/wp-includes/formatting.php
PHP | 4007 lines | 2377 code | 331 blank | 1299 comment | 330 complexity | cf4dd72771cc0d1693822a8358294c4c MD5 | raw file
Possible License(s): GPL-2.0
- <?php
- /**
- * Main WordPress Formatting API.
- *
- * Handles many functions for formatting output.
- *
- * @package WordPress
- */
- /**
- * Replaces common plain text characters into formatted entities
- *
- * As an example,
- * <code>
- * 'cause today's effort makes it worth tomorrow's "holiday"...
- * </code>
- * Becomes:
- * <code>
- * ’cause today’s effort makes it worth tomorrow’s “holiday”…
- * </code>
- * Code within certain html blocks are skipped.
- *
- * @since 0.71
- * @uses $wp_cockneyreplace Array of formatted entities for certain common phrases
- *
- * @param string $text The text to be formatted
- * @param bool $reset Set to true for unit testing. Translated patterns will reset.
- * @return string The string replaced with html entities
- */
- function wptexturize($text, $reset = false) {
- global $wp_cockneyreplace, $shortcode_tags;
- static $static_characters, $static_replacements, $dynamic_characters, $dynamic_replacements,
- $default_no_texturize_tags, $default_no_texturize_shortcodes, $run_texturize = true;
- // If there's nothing to do, just stop.
- if ( empty( $text ) || false === $run_texturize ) {
- return $text;
- }
- // Set up static variables. Run once only.
- if ( $reset || ! isset( $static_characters ) ) {
- /**
- * Filter whether to skip running wptexturize().
- *
- * Passing false to the filter will effectively short-circuit wptexturize().
- * returning the original text passed to the function instead.
- *
- * The filter runs only once, the first time wptexturize() is called.
- *
- * @since 4.0.0
- *
- * @see wptexturize()
- *
- * @param bool $run_texturize Whether to short-circuit wptexturize().
- */
- $run_texturize = apply_filters( 'run_wptexturize', $run_texturize );
- if ( false === $run_texturize ) {
- return $text;
- }
- /* translators: opening curly double quote */
- $opening_quote = _x( '“', 'opening curly double quote' );
- /* translators: closing curly double quote */
- $closing_quote = _x( '”', 'closing curly double quote' );
- /* translators: apostrophe, for example in 'cause or can't */
- $apos = _x( '’', 'apostrophe' );
- /* translators: prime, for example in 9' (nine feet) */
- $prime = _x( '′', 'prime' );
- /* translators: double prime, for example in 9" (nine inches) */
- $double_prime = _x( '″', 'double prime' );
- /* translators: opening curly single quote */
- $opening_single_quote = _x( '‘', 'opening curly single quote' );
- /* translators: closing curly single quote */
- $closing_single_quote = _x( '’', 'closing curly single quote' );
- /* translators: en dash */
- $en_dash = _x( '–', 'en dash' );
- /* translators: em dash */
- $em_dash = _x( '—', 'em dash' );
- $default_no_texturize_tags = array('pre', 'code', 'kbd', 'style', 'script', 'tt');
- $default_no_texturize_shortcodes = array('code');
- // if a plugin has provided an autocorrect array, use it
- if ( isset($wp_cockneyreplace) ) {
- $cockney = array_keys($wp_cockneyreplace);
- $cockneyreplace = array_values($wp_cockneyreplace);
- } elseif ( "'" != $apos ) { // Only bother if we're doing a replacement.
- $cockney = array( "'tain't", "'twere", "'twas", "'tis", "'twill", "'til", "'bout", "'nuff", "'round", "'cause" );
- $cockneyreplace = array( $apos . "tain" . $apos . "t", $apos . "twere", $apos . "twas", $apos . "tis", $apos . "twill", $apos . "til", $apos . "bout", $apos . "nuff", $apos . "round", $apos . "cause" );
- } else {
- $cockney = $cockneyreplace = array();
- }
- $static_characters = array_merge( array( '...', '``', '\'\'', ' (tm)' ), $cockney );
- $static_replacements = array_merge( array( '…', $opening_quote, $closing_quote, ' ™' ), $cockneyreplace );
- // Pattern-based replacements of characters.
- // Sort the remaining patterns into several arrays for performance tuning.
- $dynamic_characters = array( 'apos' => array(), 'quote' => array(), 'dash' => array() );
- $dynamic_replacements = array( 'apos' => array(), 'quote' => array(), 'dash' => array() );
- $dynamic = array();
- $spaces = wp_spaces_regexp();
- // '99' and '99" are ambiguous among other patterns; assume it's an abbreviated year at the end of a quotation.
- if ( "'" !== $apos || "'" !== $closing_single_quote ) {
- $dynamic[ '/\'(\d\d)\'(?=\Z|[.,)}\-\]]|>|' . $spaces . ')/' ] = $apos . '$1' . $closing_single_quote;
- }
- if ( "'" !== $apos || '"' !== $closing_quote ) {
- $dynamic[ '/\'(\d\d)"(?=\Z|[.,)}\-\]]|>|' . $spaces . ')/' ] = $apos . '$1' . $closing_quote;
- }
- // '99 '99s '99's (apostrophe) But never '9 or '99% or '999 or '99.0.
- if ( "'" !== $apos ) {
- $dynamic[ '/\'(?=\d\d(?:\Z|(?![%\d]|[.,]\d)))/' ] = $apos;
- }
- // Quoted Numbers like '0.42'
- if ( "'" !== $opening_single_quote && "'" !== $closing_single_quote ) {
- $dynamic[ '/(?<=\A|' . $spaces . ')\'(\d[.,\d]*)\'/' ] = $opening_single_quote . '$1' . $closing_single_quote;
- }
- // Single quote at start, or preceded by (, {, <, [, ", -, or spaces.
- if ( "'" !== $opening_single_quote ) {
- $dynamic[ '/(?<=\A|[([{"\-]|<|' . $spaces . ')\'/' ] = $opening_single_quote;
- }
- // Apostrophe in a word. No spaces, double apostrophes, or other punctuation.
- if ( "'" !== $apos ) {
- $dynamic[ '/(?<!' . $spaces . ')\'(?!\Z|[.,:;"\'(){}[\]\-]|&[lg]t;|' . $spaces . ')/' ] = $apos;
- }
- // 9' (prime)
- if ( "'" !== $prime ) {
- $dynamic[ '/(?<=\d)\'/' ] = $prime;
- }
- // Single quotes followed by spaces or ending punctuation.
- if ( "'" !== $closing_single_quote ) {
- $dynamic[ '/\'(?=\Z|[.,)}\-\]]|>|' . $spaces . ')/' ] = $closing_single_quote;
- }
- $dynamic_characters['apos'] = array_keys( $dynamic );
- $dynamic_replacements['apos'] = array_values( $dynamic );
- $dynamic = array();
- // Quoted Numbers like "42"
- if ( '"' !== $opening_quote && '"' !== $closing_quote ) {
- $dynamic[ '/(?<=\A|' . $spaces . ')"(\d[.,\d]*)"/' ] = $opening_quote . '$1' . $closing_quote;
- }
- // 9" (double prime)
- if ( '"' !== $double_prime ) {
- $dynamic[ '/(?<=\d)"/' ] = $double_prime;
- }
- // Double quote at start, or preceded by (, {, <, [, -, or spaces, and not followed by spaces.
- if ( '"' !== $opening_quote ) {
- $dynamic[ '/(?<=\A|[([{\-]|<|' . $spaces . ')"(?!' . $spaces . ')/' ] = $opening_quote;
- }
- // Any remaining double quotes.
- if ( '"' !== $closing_quote ) {
- $dynamic[ '/"/' ] = $closing_quote;
- }
- $dynamic_characters['quote'] = array_keys( $dynamic );
- $dynamic_replacements['quote'] = array_values( $dynamic );
- $dynamic = array();
- // Dashes and spaces
- $dynamic[ '/---/' ] = $em_dash;
- $dynamic[ '/(?<=' . $spaces . ')--(?=' . $spaces . ')/' ] = $em_dash;
- $dynamic[ '/(?<!xn)--/' ] = $en_dash;
- $dynamic[ '/(?<=' . $spaces . ')-(?=' . $spaces . ')/' ] = $en_dash;
- $dynamic_characters['dash'] = array_keys( $dynamic );
- $dynamic_replacements['dash'] = array_values( $dynamic );
- }
- // Must do this every time in case plugins use these filters in a context sensitive manner
- /**
- * Filter the list of HTML elements not to texturize.
- *
- * @since 2.8.0
- *
- * @param array $default_no_texturize_tags An array of HTML element names.
- */
- $no_texturize_tags = apply_filters( 'no_texturize_tags', $default_no_texturize_tags );
- /**
- * Filter the list of shortcodes not to texturize.
- *
- * @since 2.8.0
- *
- * @param array $default_no_texturize_shortcodes An array of shortcode names.
- */
- $no_texturize_shortcodes = apply_filters( 'no_texturize_shortcodes', $default_no_texturize_shortcodes );
- $no_texturize_tags_stack = array();
- $no_texturize_shortcodes_stack = array();
- // Look for shortcodes and HTML elements.
- $tagnames = array_keys( $shortcode_tags );
- $tagregexp = join( '|', array_map( 'preg_quote', $tagnames ) );
- $tagregexp = "(?:$tagregexp)(?![\\w-])"; // Excerpt of get_shortcode_regex().
- $comment_regex =
- '!' // Start of comment, after the <.
- . '(?:' // Unroll the loop: Consume everything until --> is found.
- . '-(?!->)' // Dash not followed by end of comment.
- . '[^\-]*+' // Consume non-dashes.
- . ')*+' // Loop possessively.
- . '-->'; // End of comment.
- $regex = '/(' // Capture the entire match.
- . '<' // Find start of element.
- . '(?(?=!--)' // Is this a comment?
- . $comment_regex // Find end of comment
- . '|'
- . '[^>]+>' // Find end of element
- . ')'
- . '|'
- . '\[' // Find start of shortcode.
- . '[\/\[]?' // Shortcodes may begin with [/ or [[
- . $tagregexp // Only match registered shortcodes, because performance.
- . '(?:'
- . '[^\[\]<>]+' // Shortcodes do not contain other shortcodes. Quantifier critical.
- . '|'
- . '<[^\[\]>]*>' // HTML elements permitted. Prevents matching ] before >.
- . ')*+' // Possessive critical.
- . '\]' // Find end of shortcode.
- . '\]?' // Shortcodes may end with ]]
- . ')/s';
- $textarr = preg_split( $regex, $text, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY );
- foreach ( $textarr as &$curl ) {
- // Only call _wptexturize_pushpop_element if $curl is a delimiter.
- $first = $curl[0];
- if ( '<' === $first && '>' === substr( $curl, -1 ) ) {
- // This is an HTML delimiter.
- if ( '<!--' !== substr( $curl, 0, 4 ) ) {
- _wptexturize_pushpop_element( $curl, $no_texturize_tags_stack, $no_texturize_tags );
- }
- } elseif ( '' === trim( $curl ) ) {
- // This is a newline between delimiters. Performance improves when we check this.
- continue;
- } elseif ( '[' === $first && 1 === preg_match( '/^\[\/?' . $tagregexp . '(?:[^\[\]<>]+|<[^\[\]>]*>)*+\]$/', $curl ) ) {
- // This is a shortcode delimiter.
- _wptexturize_pushpop_element( $curl, $no_texturize_shortcodes_stack, $no_texturize_shortcodes );
- } elseif ( '[' === $first && 1 === preg_match( '/^\[[\/\[]?' . $tagregexp . '(?:[^\[\]<>]+|<[^\[\]>]*>)*+\]\]?$/', $curl ) ) {
- // This is an escaped shortcode delimiter.
- // Do not texturize.
- // Do not push to the shortcodes stack.
- continue;
- } elseif ( empty( $no_texturize_shortcodes_stack ) && empty( $no_texturize_tags_stack ) ) {
- // This is neither a delimiter, nor is this content inside of no_texturize pairs. Do texturize.
- $curl = str_replace( $static_characters, $static_replacements, $curl );
- if ( false !== strpos( $curl, "'" ) ) {
- $curl = preg_replace( $dynamic_characters['apos'], $dynamic_replacements['apos'], $curl );
- }
- if ( false !== strpos( $curl, '"' ) ) {
- $curl = preg_replace( $dynamic_characters['quote'], $dynamic_replacements['quote'], $curl );
- }
- if ( false !== strpos( $curl, '-' ) ) {
- $curl = preg_replace( $dynamic_characters['dash'], $dynamic_replacements['dash'], $curl );
- }
- // 9x9 (times), but never 0x9999
- if ( 1 === preg_match( '/(?<=\d)x-?\d/', $curl ) ) {
- // Searching for a digit is 10 times more expensive than for the x, so we avoid doing this one!
- $curl = preg_replace( '/\b(\d(?(?<=0)[\d\.,]+|[\d\.,]*))x(-?\d[\d\.,]*)\b/', '$1×$2', $curl );
- }
- }
- }
- $text = implode( '', $textarr );
- // Replace each & with & unless it already looks like an entity.
- $text = preg_replace('/&(?!#(?:\d+|x[a-f0-9]+);|[a-z1-4]{1,8};)/i', '&', $text);
- return $text;
- }
- /**
- * Search for disabled element tags. Push element to stack on tag open and pop
- * on tag close.
- *
- * Assumes first char of $text is tag opening and last char is tag closing.
- * Assumes second char of $text is optionally '/' to indicate closing as in </html>.
- *
- * @since 2.9.0
- * @access private
- *
- * @param string $text Text to check. Must be a tag like <html> or [shortcode].
- * @param array $stack List of open tag elements.
- * @param array $disabled_elements The tag names to match against. Spaces are not allowed in tag names.
- */
- function _wptexturize_pushpop_element($text, &$stack, $disabled_elements) {
- // Is it an opening tag or closing tag?
- if ( '/' !== $text[1] ) {
- $opening_tag = true;
- $name_offset = 1;
- } elseif ( 0 == count( $stack ) ) {
- // Stack is empty. Just stop.
- return;
- } else {
- $opening_tag = false;
- $name_offset = 2;
- }
- // Parse out the tag name.
- $space = strpos( $text, ' ' );
- if ( FALSE === $space ) {
- $space = -1;
- } else {
- $space -= $name_offset;
- }
- $tag = substr( $text, $name_offset, $space );
- // Handle disabled tags.
- if ( in_array( $tag, $disabled_elements ) ) {
- if ( $opening_tag ) {
- /*
- * This disables texturize until we find a closing tag of our type
- * (e.g. <pre>) even if there was invalid nesting before that
- *
- * Example: in the case <pre>sadsadasd</code>"baba"</pre>
- * "baba" won't be texturize
- */
- array_push( $stack, $tag );
- } elseif ( end( $stack ) == $tag ) {
- array_pop( $stack );
- }
- }
- }
- /**
- * Replaces double line-breaks with paragraph elements.
- *
- * A group of regex replaces used to identify text formatted with newlines and
- * replace double line-breaks with HTML paragraph tags. The remaining
- * line-breaks after conversion become <<br />> tags, unless $br is set to '0'
- * or 'false'.
- *
- * @since 0.71
- *
- * @param string $pee The text which has to be formatted.
- * @param bool $br Optional. If set, this will convert all remaining line-breaks after paragraphing. Default true.
- * @return string Text which has been converted into correct paragraph tags.
- */
- function wpautop($pee, $br = true) {
- $pre_tags = array();
- if ( trim($pee) === '' )
- return '';
- $pee = $pee . "\n"; // just to make things a little easier, pad the end
- if ( strpos($pee, '<pre') !== false ) {
- $pee_parts = explode( '</pre>', $pee );
- $last_pee = array_pop($pee_parts);
- $pee = '';
- $i = 0;
- foreach ( $pee_parts as $pee_part ) {
- $start = strpos($pee_part, '<pre');
- // Malformed html?
- if ( $start === false ) {
- $pee .= $pee_part;
- continue;
- }
- $name = "<pre wp-pre-tag-$i></pre>";
- $pre_tags[$name] = substr( $pee_part, $start ) . '</pre>';
- $pee .= substr( $pee_part, 0, $start ) . $name;
- $i++;
- }
- $pee .= $last_pee;
- }
- $pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee);
- // Space things out a little
- $allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|details|menu|summary)';
- $pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee);
- $pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee);
- $pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines
- if ( strpos( $pee, '<option' ) !== false ) {
- // no P/BR around option
- $pee = preg_replace( '|\s*<option|', '<option', $pee );
- $pee = preg_replace( '|</option>\s*|', '</option>', $pee );
- }
- if ( strpos( $pee, '</object>' ) !== false ) {
- // no P/BR around param and embed
- $pee = preg_replace( '|(<object[^>]*>)\s*|', '$1', $pee );
- $pee = preg_replace( '|\s*</object>|', '</object>', $pee );
- $pee = preg_replace( '%\s*(</?(?:param|embed)[^>]*>)\s*%', '$1', $pee );
- }
- if ( strpos( $pee, '<source' ) !== false || strpos( $pee, '<track' ) !== false ) {
- // no P/BR around source and track
- $pee = preg_replace( '%([<\[](?:audio|video)[^>\]]*[>\]])\s*%', '$1', $pee );
- $pee = preg_replace( '%\s*([<\[]/(?:audio|video)[>\]])%', '$1', $pee );
- $pee = preg_replace( '%\s*(<(?:source|track)[^>]*>)\s*%', '$1', $pee );
- }
- $pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates
- // make paragraphs, including one at the end
- $pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY);
- $pee = '';
- foreach ( $pees as $tinkle ) {
- $pee .= '<p>' . trim($tinkle, "\n") . "</p>\n";
- }
- $pee = preg_replace('|<p>\s*</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace
- $pee = preg_replace('!<p>([^<]+)</(div|address|form)>!', "<p>$1</p></$2>", $pee);
- $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag
- $pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem with nested lists
- $pee = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee);
- $pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee);
- $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee);
- $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee);
- if ( $br ) {
- $pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', '_autop_newline_preservation_helper', $pee);
- $pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee); // optionally make line breaks
- $pee = str_replace('<WPPreserveNewline />', "\n", $pee);
- }
- $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee);
- $pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee);
- $pee = preg_replace( "|\n</p>$|", '</p>', $pee );
- if ( !empty($pre_tags) )
- $pee = str_replace(array_keys($pre_tags), array_values($pre_tags), $pee);
- return $pee;
- }
- /**
- * Newline preservation help function for wpautop
- *
- * @since 3.1.0
- * @access private
- *
- * @param array $matches preg_replace_callback matches array
- * @return string
- */
- function _autop_newline_preservation_helper( $matches ) {
- return str_replace("\n", "<WPPreserveNewline />", $matches[0]);
- }
- /**
- * Don't auto-p wrap shortcodes that stand alone
- *
- * Ensures that shortcodes are not wrapped in <<p>>...<</p>>.
- *
- * @since 2.9.0
- *
- * @param string $pee The content.
- * @return string The filtered content.
- */
- function shortcode_unautop( $pee ) {
- global $shortcode_tags;
- if ( empty( $shortcode_tags ) || !is_array( $shortcode_tags ) ) {
- return $pee;
- }
- $tagregexp = join( '|', array_map( 'preg_quote', array_keys( $shortcode_tags ) ) );
- $spaces = wp_spaces_regexp();
- $pattern =
- '/'
- . '<p>' // Opening paragraph
- . '(?:' . $spaces . ')*+' // Optional leading whitespace
- . '(' // 1: The shortcode
- . '\\[' // Opening bracket
- . "($tagregexp)" // 2: Shortcode name
- . '(?![\\w-])' // Not followed by word character or hyphen
- // Unroll the loop: Inside the opening shortcode tag
- . '[^\\]\\/]*' // Not a closing bracket or forward slash
- . '(?:'
- . '\\/(?!\\])' // A forward slash not followed by a closing bracket
- . '[^\\]\\/]*' // Not a closing bracket or forward slash
- . ')*?'
- . '(?:'
- . '\\/\\]' // Self closing tag and closing bracket
- . '|'
- . '\\]' // Closing bracket
- . '(?:' // Unroll the loop: Optionally, anything between the opening and closing shortcode tags
- . '[^\\[]*+' // Not an opening bracket
- . '(?:'
- . '\\[(?!\\/\\2\\])' // An opening bracket not followed by the closing shortcode tag
- . '[^\\[]*+' // Not an opening bracket
- . ')*+'
- . '\\[\\/\\2\\]' // Closing shortcode tag
- . ')?'
- . ')'
- . ')'
- . '(?:' . $spaces . ')*+' // optional trailing whitespace
- . '<\\/p>' // closing paragraph
- . '/s';
- return preg_replace( $pattern, '$1', $pee );
- }
- /**
- * Checks to see if a string is utf8 encoded.
- *
- * NOTE: This function checks for 5-Byte sequences, UTF8
- * has Bytes Sequences with a maximum length of 4.
- *
- * @author bmorel at ssi dot fr (modified)
- * @since 1.2.1
- *
- * @param string $str The string to be checked
- * @return bool True if $str fits a UTF-8 model, false otherwise.
- */
- function seems_utf8($str) {
- mbstring_binary_safe_encoding();
- $length = strlen($str);
- reset_mbstring_encoding();
- for ($i=0; $i < $length; $i++) {
- $c = ord($str[$i]);
- if ($c < 0x80) $n = 0; # 0bbbbbbb
- elseif (($c & 0xE0) == 0xC0) $n=1; # 110bbbbb
- elseif (($c & 0xF0) == 0xE0) $n=2; # 1110bbbb
- elseif (($c & 0xF8) == 0xF0) $n=3; # 11110bbb
- elseif (($c & 0xFC) == 0xF8) $n=4; # 111110bb
- elseif (($c & 0xFE) == 0xFC) $n=5; # 1111110b
- else return false; # Does not match any model
- for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?
- if ((++$i == $length) || ((ord($str[$i]) & 0xC0) != 0x80))
- return false;
- }
- }
- return true;
- }
- /**
- * Converts a number of special characters into their HTML entities.
- *
- * Specifically deals with: &, <, >, ", and '.
- *
- * $quote_style can be set to ENT_COMPAT to encode " to
- * ", or ENT_QUOTES to do both. Default is ENT_NOQUOTES where no quotes are encoded.
- *
- * @since 1.2.2
- * @access private
- *
- * @param string $string The text which is to be encoded.
- * @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES.
- * @param string $charset Optional. The character encoding of the string. Default is false.
- * @param boolean $double_encode Optional. Whether to encode existing html entities. Default is false.
- * @return string The encoded text with HTML entities.
- */
- function _wp_specialchars( $string, $quote_style = ENT_NOQUOTES, $charset = false, $double_encode = false ) {
- $string = (string) $string;
- if ( 0 === strlen( $string ) )
- return '';
- // Don't bother if there are no specialchars - saves some processing
- if ( ! preg_match( '/[&<>"\']/', $string ) )
- return $string;
- // Account for the previous behaviour of the function when the $quote_style is not an accepted value
- if ( empty( $quote_style ) )
- $quote_style = ENT_NOQUOTES;
- elseif ( ! in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) )
- $quote_style = ENT_QUOTES;
- // Store the site charset as a static to avoid multiple calls to wp_load_alloptions()
- if ( ! $charset ) {
- static $_charset;
- if ( ! isset( $_charset ) ) {
- $alloptions = wp_load_alloptions();
- $_charset = isset( $alloptions['blog_charset'] ) ? $alloptions['blog_charset'] : '';
- }
- $charset = $_charset;
- }
- if ( in_array( $charset, array( 'utf8', 'utf-8', 'UTF8' ) ) )
- $charset = 'UTF-8';
- $_quote_style = $quote_style;
- if ( $quote_style === 'double' ) {
- $quote_style = ENT_COMPAT;
- $_quote_style = ENT_COMPAT;
- } elseif ( $quote_style === 'single' ) {
- $quote_style = ENT_NOQUOTES;
- }
- // Handle double encoding ourselves
- if ( $double_encode ) {
- $string = @htmlspecialchars( $string, $quote_style, $charset );
- } else {
- // Decode & into &
- $string = wp_specialchars_decode( $string, $_quote_style );
- // Guarantee every &entity; is valid or re-encode the &
- $string = wp_kses_normalize_entities( $string );
- // Now re-encode everything except &entity;
- $string = preg_split( '/(&#?x?[0-9a-z]+;)/i', $string, -1, PREG_SPLIT_DELIM_CAPTURE );
- for ( $i = 0; $i < count( $string ); $i += 2 )
- $string[$i] = @htmlspecialchars( $string[$i], $quote_style, $charset );
- $string = implode( '', $string );
- }
- // Backwards compatibility
- if ( 'single' === $_quote_style )
- $string = str_replace( "'", ''', $string );
- return $string;
- }
- /**
- * Converts a number of HTML entities into their special characters.
- *
- * Specifically deals with: &, <, >, ", and '.
- *
- * $quote_style can be set to ENT_COMPAT to decode " entities,
- * or ENT_QUOTES to do both " and '. Default is ENT_NOQUOTES where no quotes are decoded.
- *
- * @since 2.8.0
- *
- * @param string $string The text which is to be decoded.
- * @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old _wp_specialchars() values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES.
- * @return string The decoded text without HTML entities.
- */
- function wp_specialchars_decode( $string, $quote_style = ENT_NOQUOTES ) {
- $string = (string) $string;
- if ( 0 === strlen( $string ) ) {
- return '';
- }
- // Don't bother if there are no entities - saves a lot of processing
- if ( strpos( $string, '&' ) === false ) {
- return $string;
- }
- // Match the previous behaviour of _wp_specialchars() when the $quote_style is not an accepted value
- if ( empty( $quote_style ) ) {
- $quote_style = ENT_NOQUOTES;
- } elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) {
- $quote_style = ENT_QUOTES;
- }
- // More complete than get_html_translation_table( HTML_SPECIALCHARS )
- $single = array( ''' => '\'', ''' => '\'' );
- $single_preg = array( '/�*39;/' => ''', '/�*27;/i' => ''' );
- $double = array( '"' => '"', '"' => '"', '"' => '"' );
- $double_preg = array( '/�*34;/' => '"', '/�*22;/i' => '"' );
- $others = array( '<' => '<', '<' => '<', '>' => '>', '>' => '>', '&' => '&', '&' => '&', '&' => '&' );
- $others_preg = array( '/�*60;/' => '<', '/�*62;/' => '>', '/�*38;/' => '&', '/�*26;/i' => '&' );
- if ( $quote_style === ENT_QUOTES ) {
- $translation = array_merge( $single, $double, $others );
- $translation_preg = array_merge( $single_preg, $double_preg, $others_preg );
- } elseif ( $quote_style === ENT_COMPAT || $quote_style === 'double' ) {
- $translation = array_merge( $double, $others );
- $translation_preg = array_merge( $double_preg, $others_preg );
- } elseif ( $quote_style === 'single' ) {
- $translation = array_merge( $single, $others );
- $translation_preg = array_merge( $single_preg, $others_preg );
- } elseif ( $quote_style === ENT_NOQUOTES ) {
- $translation = $others;
- $translation_preg = $others_preg;
- }
- // Remove zero padding on numeric entities
- $string = preg_replace( array_keys( $translation_preg ), array_values( $translation_preg ), $string );
- // Replace characters according to translation table
- return strtr( $string, $translation );
- }
- /**
- * Checks for invalid UTF8 in a string.
- *
- * @since 2.8.0
- *
- * @param string $string The text which is to be checked.
- * @param boolean $strip Optional. Whether to attempt to strip out invalid UTF8. Default is false.
- * @return string The checked text.
- */
- function wp_check_invalid_utf8( $string, $strip = false ) {
- $string = (string) $string;
- if ( 0 === strlen( $string ) ) {
- return '';
- }
- // Store the site charset as a static to avoid multiple calls to get_option()
- static $is_utf8;
- if ( !isset( $is_utf8 ) ) {
- $is_utf8 = in_array( get_option( 'blog_charset' ), array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) );
- }
- if ( !$is_utf8 ) {
- return $string;
- }
- // Check for support for utf8 in the installed PCRE library once and store the result in a static
- static $utf8_pcre;
- if ( !isset( $utf8_pcre ) ) {
- $utf8_pcre = @preg_match( '/^./u', 'a' );
- }
- // We can't demand utf8 in the PCRE installation, so just return the string in those cases
- if ( !$utf8_pcre ) {
- return $string;
- }
- // preg_match fails when it encounters invalid UTF8 in $string
- if ( 1 === @preg_match( '/^./us', $string ) ) {
- return $string;
- }
- // Attempt to strip the bad chars if requested (not recommended)
- if ( $strip && function_exists( 'iconv' ) ) {
- return iconv( 'utf-8', 'utf-8', $string );
- }
- return '';
- }
- /**
- * Encode the Unicode values to be used in the URI.
- *
- * @since 1.5.0
- *
- * @param string $utf8_string
- * @param int $length Max length of the string
- * @return string String with Unicode encoded for URI.
- */
- function utf8_uri_encode( $utf8_string, $length = 0 ) {
- $unicode = '';
- $values = array();
- $num_octets = 1;
- $unicode_length = 0;
- mbstring_binary_safe_encoding();
- $string_length = strlen( $utf8_string );
- reset_mbstring_encoding();
- for ($i = 0; $i < $string_length; $i++ ) {
- $value = ord( $utf8_string[ $i ] );
- if ( $value < 128 ) {
- if ( $length && ( $unicode_length >= $length ) )
- break;
- $unicode .= chr($value);
- $unicode_length++;
- } else {
- if ( count( $values ) == 0 ) $num_octets = ( $value < 224 ) ? 2 : 3;
- $values[] = $value;
- if ( $length && ( $unicode_length + ($num_octets * 3) ) > $length )
- break;
- if ( count( $values ) == $num_octets ) {
- if ($num_octets == 3) {
- $unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]) . '%' . dechex($values[2]);
- $unicode_length += 9;
- } else {
- $unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]);
- $unicode_length += 6;
- }
- $values = array();
- $num_octets = 1;
- }
- }
- }
- return $unicode;
- }
- /**
- * Converts all accent characters to ASCII characters.
- *
- * If there are no accent characters, then the string given is just returned.
- *
- * @since 1.2.1
- *
- * @param string $string Text that might have accent characters
- * @return string Filtered string with replaced "nice" characters.
- */
- function remove_accents($string) {
- if ( !preg_match('/[\x80-\xff]/', $string) )
- return $string;
- if (seems_utf8($string)) {
- $chars = array(
- // Decompositions for Latin-1 Supplement
- chr(194).chr(170) => 'a', chr(194).chr(186) => 'o',
- chr(195).chr(128) => 'A', chr(195).chr(129) => 'A',
- chr(195).chr(130) => 'A', chr(195).chr(131) => 'A',
- chr(195).chr(132) => 'A', chr(195).chr(133) => 'A',
- chr(195).chr(134) => 'AE',chr(195).chr(135) => 'C',
- chr(195).chr(136) => 'E', chr(195).chr(137) => 'E',
- chr(195).chr(138) => 'E', chr(195).chr(139) => 'E',
- chr(195).chr(140) => 'I', chr(195).chr(141) => 'I',
- chr(195).chr(142) => 'I', chr(195).chr(143) => 'I',
- chr(195).chr(144) => 'D', chr(195).chr(145) => 'N',
- chr(195).chr(146) => 'O', chr(195).chr(147) => 'O',
- chr(195).chr(148) => 'O', chr(195).chr(149) => 'O',
- chr(195).chr(150) => 'O', chr(195).chr(153) => 'U',
- chr(195).chr(154) => 'U', chr(195).chr(155) => 'U',
- chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y',
- chr(195).chr(158) => 'TH',chr(195).chr(159) => 's',
- chr(195).chr(160) => 'a', chr(195).chr(161) => 'a',
- chr(195).chr(162) => 'a', chr(195).chr(163) => 'a',
- chr(195).chr(164) => 'a', chr(195).chr(165) => 'a',
- chr(195).chr(166) => 'ae',chr(195).chr(167) => 'c',
- chr(195).chr(168) => 'e', chr(195).chr(169) => 'e',
- chr(195).chr(170) => 'e', chr(195).chr(171) => 'e',
- chr(195).chr(172) => 'i', chr(195).chr(173) => 'i',
- chr(195).chr(174) => 'i', chr(195).chr(175) => 'i',
- chr(195).chr(176) => 'd', chr(195).chr(177) => 'n',
- chr(195).chr(178) => 'o', chr(195).chr(179) => 'o',
- chr(195).chr(180) => 'o', chr(195).chr(181) => 'o',
- chr(195).chr(182) => 'o', chr(195).chr(184) => 'o',
- chr(195).chr(185) => 'u', chr(195).chr(186) => 'u',
- chr(195).chr(187) => 'u', chr(195).chr(188) => 'u',
- chr(195).chr(189) => 'y', chr(195).chr(190) => 'th',
- chr(195).chr(191) => 'y', chr(195).chr(152) => 'O',
- // Decompositions for Latin Extended-A
- chr(196).chr(128) => 'A', chr(196).chr(129) => 'a',
- chr(196).chr(130) => 'A', chr(196).chr(131) => 'a',
- chr(196).chr(132) => 'A', chr(196).chr(133) => 'a',
- chr(196).chr(134) => 'C', chr(196).chr(135) => 'c',
- chr(196).chr(136) => 'C', chr(196).chr(137) => 'c',
- chr(196).chr(138) => 'C', chr(196).chr(139) => 'c',
- chr(196).chr(140) => 'C', chr(196).chr(141) => 'c',
- chr(196).chr(142) => 'D', chr(196).chr(143) => 'd',
- chr(196).chr(144) => 'D', chr(196).chr(145) => 'd',
- chr(196).chr(146) => 'E', chr(196).chr(147) => 'e',
- chr(196).chr(148) => 'E', chr(196).chr(149) => 'e',
- chr(196).chr(150) => 'E', chr(196).chr(151) => 'e',
- chr(196).chr(152) => 'E', chr(196).chr(153) => 'e',
- chr(196).chr(154) => 'E', chr(196).chr(155) => 'e',
- chr(196).chr(156) => 'G', chr(196).chr(157) => 'g',
- chr(196).chr(158) => 'G', chr(196).chr(159) => 'g',
- chr(196).chr(160) => 'G', chr(196).chr(161) => 'g',
- chr(196).chr(162) => 'G', chr(196).chr(163) => 'g',
- chr(196).chr(164) => 'H', chr(196).chr(165) => 'h',
- chr(196).chr(166) => 'H', chr(196).chr(167) => 'h',
- chr(196).chr(168) => 'I', chr(196).chr(169) => 'i',
- chr(196).chr(170) => 'I', chr(196).chr(171) => 'i',
- chr(196).chr(172) => 'I', chr(196).chr(173) => 'i',
- chr(196).chr(174) => 'I', chr(196).chr(175) => 'i',
- chr(196).chr(176) => 'I', chr(196).chr(177) => 'i',
- chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij',
- chr(196).chr(180) => 'J', chr(196).chr(181) => 'j',
- chr(196).chr(182) => 'K', chr(196).chr(183) => 'k',
- chr(196).chr(184) => 'k', chr(196).chr(185) => 'L',
- chr(196).chr(186) => 'l', chr(196).chr(187) => 'L',
- chr(196).chr(188) => 'l', chr(196).chr(189) => 'L',
- chr(196).chr(190) => 'l', chr(196).chr(191) => 'L',
- chr(197).chr(128) => 'l', chr(197).chr(129) => 'L',
- chr(197).chr(130) => 'l', chr(197).chr(131) => 'N',
- chr(197).chr(132) => 'n', chr(197).chr(133) => 'N',
- chr(197).chr(134) => 'n', chr(197).chr(135) => 'N',
- chr(197).chr(136) => 'n', chr(197).chr(137) => 'N',
- chr(197).chr(138) => 'n', chr(197).chr(139) => 'N',
- chr(197).chr(140) => 'O', chr(197).chr(141) => 'o',
- chr(197).chr(142) => 'O', chr(197).chr(143) => 'o',
- chr(197).chr(144) => 'O', chr(197).chr(145) => 'o',
- chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe',
- chr(197).chr(148) => 'R',chr(197).chr(149) => 'r',
- chr(197).chr(150) => 'R',chr(197).chr(151) => 'r',
- chr(197).chr(152) => 'R',chr(197).chr(153) => 'r',
- chr(197).chr(154) => 'S',chr(197).chr(155) => 's',
- chr(197).chr(156) => 'S',chr(197).chr(157) => 's',
- chr(197).chr(158) => 'S',chr(197).chr(159) => 's',
- chr(197).chr(160) => 'S', chr(197).chr(161) => 's',
- chr(197).chr(162) => 'T', chr(197).chr(163) => 't',
- chr(197).chr(164) => 'T', chr(197).chr(165) => 't',
- chr(197).chr(166) => 'T', chr(197).chr(167) => 't',
- chr(197).chr(168) => 'U', chr(197).chr(169) => 'u',
- chr(197).chr(170) => 'U', chr(197).chr(171) => 'u',
- chr(197).chr(172) => 'U', chr(197).chr(173) => 'u',
- chr(197).chr(174) => 'U', chr(197).chr(175) => 'u',
- chr(197).chr(176) => 'U', chr(197).chr(177) => 'u',
- chr(197).chr(178) => 'U', chr(197).chr(179) => 'u',
- chr(197).chr(180) => 'W', chr(197).chr(181) => 'w',
- chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y',
- chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z',
- chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z',
- chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z',
- chr(197).chr(190) => 'z', chr(197).chr(191) => 's',
- // Decompositions for Latin Extended-B
- chr(200).chr(152) => 'S', chr(200).chr(153) => 's',
- chr(200).chr(154) => 'T', chr(200).chr(155) => 't',
- // Euro Sign
- chr(226).chr(130).chr(172) => 'E',
- // GBP (Pound) Sign
- chr(194).chr(163) => '',
- // Vowels with diacritic (Vietnamese)
- // unmarked
- chr(198).chr(160) => 'O', chr(198).chr(161) => 'o',
- chr(198).chr(175) => 'U', chr(198).chr(176) => 'u',
- // grave accent
- chr(225).chr(186).chr(166) => 'A', chr(225).chr(186).chr(167) => 'a',
- chr(225).chr(186).chr(176) => 'A', chr(225).chr(186).chr(177) => 'a',
- chr(225).chr(187).chr(128) => 'E', chr(225).chr(187).chr(129) => 'e',
- chr(225).chr(187).chr(146) => 'O', chr(225).chr(187).chr(147) => 'o',
- chr(225).chr(187).chr(156) => 'O', chr(225).chr(187).chr(157) => 'o',
- chr(225).chr(187).chr(170) => 'U', chr(225).chr(187).chr(171) => 'u',
- chr(225).chr(187).chr(178) => 'Y', chr(225).chr(187).chr(179) => 'y',
- // hook
- chr(225).chr(186).chr(162) => 'A', chr(225).chr(186).chr(163) => 'a',
- chr(225).chr(186).chr(168) => 'A', chr(225).chr(186).chr(169) => 'a',
- chr(225).chr(186).chr(178) => 'A', chr(225).chr(186).chr(179) => 'a',
- chr(225).chr(186).chr(186) => 'E', chr(225).chr(186).chr(187) => 'e',
- chr(225).chr(187).chr(130) => 'E', chr(225).chr(187).chr(131) => 'e',
- chr(225).chr(187).chr(136) => 'I', chr(225).chr(187).chr(137) => 'i',
- chr(225).chr(187).chr(142) => 'O', chr(225).chr(187).chr(143) => 'o',
- chr(225).chr(187).chr(148) => 'O', chr(225).chr(187).chr(149) => 'o',
- chr(225).chr(187).chr(158) => 'O', chr(225).chr(187).chr(159) => 'o',
- chr(225).chr(187).chr(166) => 'U', chr(225).chr(187).chr(167) => 'u',
- chr(225).chr(187).chr(172) => 'U', chr(225).chr(187).chr(173) => 'u',
- chr(225).chr(187).chr(182) => 'Y', chr(225).chr(187).chr(183) => 'y',
- // tilde
- chr(225).chr(186).chr(170) => 'A', chr(225).chr(186).chr(171) => 'a',
- chr(225).chr(186).chr(180) => 'A', chr(225).chr(186).chr(181) => 'a',
- chr(225).chr(186).chr(188) => 'E', chr(225).chr(186).chr(189) => 'e',
- chr(225).chr(187).chr(132) => 'E', chr(225).chr(187).chr(133) => 'e',
- chr(225).chr(187).chr(150) => 'O', chr(225).chr(187).chr(151) => 'o',
- chr(225).chr(187).chr(160) => 'O', chr(225).chr(187).chr(161) => 'o',
- chr(225).chr(187).chr(174) => 'U', chr(225).chr(187).chr(175) => 'u',
- chr(225).chr(187).chr(184) => 'Y', chr(225).chr(187).chr(185) => 'y',
- // acute accent
- chr(225).chr(186).chr(164) => 'A', chr(225).chr(186).chr(165) => 'a',
- chr(225).chr(186).chr(174) => 'A', chr(225).chr(186).chr(175) => 'a',
- chr(225).chr(186).chr(190) => 'E', chr(225).chr(186).chr(191) => 'e',
- chr(225).chr(187).chr(144) => 'O', chr(225).chr(187).chr(145) => 'o',
- chr(225).chr(187).chr(154) => 'O', chr(225).chr(187).chr(155) => 'o',
- chr(225).chr(187).chr(168) => 'U', chr(225).chr(187).chr(169) => 'u',
- // dot below
- chr(225).chr(186).chr(160) => 'A', chr(225).chr(186).chr(161) => 'a',
- chr(225).chr(186).chr(172) => 'A', chr(225).chr(186).chr(173) => 'a',
- chr(225).chr(186).chr(182) => 'A', chr(225).chr(186).chr(183) => 'a',
- chr(225).chr(186).chr(184) => 'E', chr(225).chr(186).chr(185) => 'e',
- chr(225).chr(187).chr(134) => 'E', chr(225).chr(187).chr(135) => 'e',
- chr(225).chr(187).chr(138) => 'I', chr(225).chr(187).chr(139) => 'i',
- chr(225).chr(187).chr(140) => 'O', chr(225).chr(187).chr(141) => 'o',
- chr(225).chr(187).chr(152) => 'O', chr(225).chr(187).chr(153) => 'o',
- chr(225).chr(187).chr(162) => 'O', chr(225).chr(187).chr(163) => 'o',
- chr(225).chr(187).chr(164) => 'U', chr(225).chr(187).chr(165) => 'u',
- chr(225).chr(187).chr(176) => 'U', chr(225).chr(187).chr(177) => 'u',
- chr(225).chr(187).chr(180) => 'Y', chr(225).chr(187).chr(181) => 'y',
- // Vowels with diacritic (Chinese, Hanyu Pinyin)
- chr(201).chr(145) => 'a',
- // macron
- chr(199).chr(149) => 'U', chr(199).chr(150) => 'u',
- // acute accent
- chr(199).chr(151) => 'U', chr(199).chr(152) => 'u',
- // caron
- chr(199).chr(141) => 'A', chr(199).chr(142) => 'a',
- chr(199).chr(143) => 'I', chr(199).chr(144) => 'i',
- chr(199).chr(145) => 'O', chr(199).chr(146) => 'o',
- chr(199).chr(147) => 'U', chr(199).chr(148) => 'u',
- chr(199).chr(153) => 'U', chr(199).chr(154) => 'u',
- // grave accent
- chr(199).chr(155) => 'U', chr(199).chr(156) => 'u',
- );
- // Used for locale-specific rules
- $locale = get_locale();
- if ( 'de_DE' == $locale ) {
- $chars[ chr(195).chr(132) ] = 'Ae';
- $chars[ chr(195).chr(164) ] = 'ae';
- $chars[ chr(195).chr(150) ] = 'Oe';
- $chars[ chr(195).chr(182) ] = 'oe';
- $chars[ chr(195).chr(156) ] = 'Ue';
- $chars[ chr(195).chr(188) ] = 'ue';
- $chars[ chr(195).chr(159) ] = 'ss';
- } elseif ( 'da_DK' === $locale ) {
- $chars[ chr(195).chr(134) ] = 'Ae';
- $chars[ chr(195).chr(166) ] = 'ae';
- $chars[ chr(195).chr(152) ] = 'Oe';
- $chars[ chr(195).chr(184) ] = 'oe';
- $chars[ chr(195).chr(133) ] = 'Aa';
- $chars[ chr(195).chr(165) ] = 'aa';
- }
- $string = strtr($string, $chars);
- } else {
- // Assume ISO-8859-1 if not UTF-8
- $chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158)
- .chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194)
- .chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202)
- .chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210)
- .chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218)
- .chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227)
- .chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235)
- .chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243)
- .chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251)
- .chr(252).chr(253).chr(255);
- $chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy";
- $string = strtr($string, $chars['in'], $chars['out']);
- $double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254));
- $double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th');
- $string = str_replace($double_chars['in'], $double_chars['out'], $string);
- }
- return $string;
- }
- /**
- * Sanitizes a filename, replacing whitespace with dashes.
- *
- * Removes special characters that are illegal in filenames on certain
- * operating systems and special characters requiring special escaping
- * to manipulate at the command line. Replaces spaces and consecutive
- * dashes with a single dash. Trims period, dash and underscore from beginning
- * and end of filename.
- *
- * @since 2.1.0
- *
- * @param string $filename The filename to be sanitized
- * @return string The sanitized filename
- */
- function sanitize_file_name( $filename ) {
- $filename_raw = $filename;
- $special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", chr(0));
- /**
- * Filter the list of characters to remove from a filename.
- *
- * @since 2.8.0
- *
- * @param array $special_chars Characters to remove.
- * @param string $filename_raw Filename as it was passed into sanitize_file_name().
- */
- $special_chars = apply_filters( 'sanitize_file_name_chars', $special_chars, $filename_raw );
- $filename = preg_replace( "#\x{00a0}#siu", ' ', $filename );
- $filename = str_replace($special_chars, '', $filename);
- $filename = str_replace( array( '%20', '+' ), '-', $filename );
- $filename = preg_replace('/[\s-]+/', '-', $filename);
- $filename = trim($filename, '.-_');
- // Split the filename into a base and extension[s]
- $parts = explode('.', $filename);
- // Return if only one extension
- if ( count( $parts ) <= 2 ) {
- /**
- * Filter a sanitized filename string.
- *
- * @since 2.8.0
- *
- * @param string $filename Sanitized filename.
- * @param string $filename_raw The filename prior to sanitization.
- */
- return apply_filters( 'sanitize_file_name', $filename, $filename_raw );
- }
- // Process multiple extensions
- $filename = array_shift($parts);
- $extension = array_pop($parts);
- $mimes = get_allowed_mime_types();
- /*
- * Loop over any intermediate extensions. Postfix them with a trailing underscore
- * if they are a 2 - 5 character long alpha string not in the extension whitelist.
- */
- foreach ( (array) $parts as $part) {
- $filename .= '.' . $part;
- if ( preg_match("/^[a-zA-Z]{2,5}\d?$/", $part) ) {
- $allowed = false;
- foreach ( $mimes as $ext_preg => $mime_match ) {
- $ext_preg = '!^(' . $ext_preg . ')$!i';
- if ( preg_match( $ext_preg, $part ) ) {
- $allowed = true;
- break;
- }
- }
- if ( !$allowed )
- $filename .= '_';
- }
- }
- $filename .= '.' . $extension;
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters('sanitize_file_name', $filename, $filename_raw);
- }
- /**
- * Sanitizes a username, stripping out unsafe characters.
- *
- * Removes tags, octets, entities, and if strict is enabled, will only keep
- * alphanumeric, _, space, ., -, @. After sanitizing, it passes the username,
- * raw username (the username in the parameter), and the value of $strict as
- * parameters for the 'sanitize_user' filter.
- *
- * @since 2.0.0
- *
- * @param string $username The username to be sanitized.
- * @param bool $strict If set limits $username to specific characters. Default false.
- * @return string The sanitized username, after passing through filters.
- */
- function sanitize_user( $username, $strict = false ) {
- $raw_username = $username;
- $username = wp_strip_all_tags( $username );
- $username = remove_accents( $username );
- // Kill octets
- $username = preg_replace( '|%([a-fA-F0-9][a-fA-F0-9])|', '', $username );
- $username = preg_replace( '/&.+?;/', '', $username ); // Kill entities
- // If strict, reduce to ASCII for max portability.
- if ( $strict )
- $username = preg_replace( '|[^a-z0-9 _.\-@]|i', '', $username );
- $username = trim( $username );
- // Consolidate contiguous whitespace
- $username = preg_replace( '|\s+|', ' ', $username );
- /**
- * Filter a sanitized username string.
- *
- * @since 2.0.1
- *
- * @param string $username Sanitized username.
- * @param string $raw_username The username prior to sanitization.
- * @param bool $strict Whether to limit the sanitization to specific characters. Default false.
- */
- return apply_filters( 'sanitize_user', $username, $raw_username, $strict );
- }
- /**
- * Sanitizes a string key.
- *
- * Keys are used as internal identifiers. Lowercase alphanumeric characters, dashes and underscores are allowed.
- *
- * @since 3.0.0
- *
- * @param string $key String key
- * @return string Sanitized key
- */
- function sanitize_key( $key ) {
- $raw_key = $key;
- $key = strtolower( $key );
- $key = preg_replace( '/[^a-z0-9_\-]/', '', $key );
- /**
- * Filter a sanitized key string.
- *
- * @since 3.0.0
- *
- * @param string $key Sanitized key.
- * @param string $raw_key The key prior to sanitization.
- */
- return apply_filters( 'sanitize_key', $key, $raw_key );
- }
- /**
- * Sanitizes a title, or returns a fallback title.
- *
- * Specifically, HTML and PHP tags are stripped. Further actions can be added
- * via the plugin API. If $title is empty and $fallback_title is set, the latter
- * will be used.
- *
- * @since 1.0.0
- *
- * @param string $title The string to be sanitized.
- * @param string $fallback_title Optional. A title to use if $title is empty.
- * @param string $context Optional. The operation for which the string is sanitized
- * @return string The sanitized string.
- */
- function sanitize_title( $title, $fallback_title = '', $context = 'save' ) {
- $raw_title = $title;
- if ( 'save' == $context )
- $title = remove_accents($title);
- /**
- * Filter a sanitized title string.
- *
- * @since 1.2.0
- *
- * @param string $title Sanitized title.
- * @param string $raw_title The title prior to sanitization.
- * @param string $context The context for which the title is being sanitized.
- */
- $title = apply_filters( 'sanitize_title', $title, $raw_title, $context );
- if ( '' === $title || false === $title )
- $title = $fallback_title;
- return $title;
- }
- /**
- * Sanitizes a title with the 'query' context.
- *
- * Used for querying the database for a value from URL.
- *
- * @since 3.1.0
- * @uses sanitize_title()
- *
- * @param string $title The string to be sanitized.
- * @return string The sanitized string.
- */
- function sanitize_title_for_query( $title ) {
- return sanitize_title( $title, '', 'query' );
- }
- /**
- * Sanitizes a title, replacing whitespace and a few other characters with dashes.
- *
- * Limits the output to alphanumeric characters, underscore (_) and dash (-).
- * Whitespace becomes a dash.
- *
- * @since 1.2.0
- *
- * @param string $title The title to be sanitized.
- * @param string $raw_title Optional. Not used.
- * @param string $context Optional. The operation for which the string is sanitized.
- * @return string The sanitized title.
- */
- function sanitize_title_with_dashes( $title, $raw_title = '', $context = 'display' ) {
- $title = strip_tags($title);
- // Preserve escaped octets.
- $title = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '---$1---', $title);
- // Remove percent signs that are not part of an octet.
- $title = str_replace('%', '', $title);
- // Restore octets.
- $title = preg_replace('|---([a-fA-F0-9][a-fA-F0-9])---|', '%$1', $title);
- if (seems_utf8($title)) {
- if (function_exists('mb_strtolower')) {
- $title = mb_strtolower($title, 'UTF-8');
- }
- $title = utf8_uri_encode($title, 200);
- }
- $title = strtolower($title);
- $title = preg_replace('/&.+?;/', '', $title); // kill entities
- $title = str_replace('.', '-', $title);
- if ( 'save' == $context ) {
- // Convert nbsp, ndash and mdash to hyphens
- $title = str_replace( array( '%c2%a0', '%e2%80%93', '%e2%80%94' ), '-', $title );
- // Strip these characters entirely
- $title = str_replace( array(
- // iexcl and iquest
- '%c2%a1', '%c2%bf',
- // angle quotes
- '%c2%ab', '%c2%bb', '%e2%80%b9', '%e2%80%ba',
- // curly quotes
- '%e2%80%98', '%e2%80%99', '%e2%80%9c', '%e2%80%9d',
- '%e2%80%9a', '%e2%80%9b', '%e2%80%9e', '%e2%80%9f',
- // copy, reg, deg, hellip and trade
- '%c2%a9', '%c2%ae', '%c2%b0', '%e2%80%a6', '%e2%84%a2',
- // acute accents
- '%c2%b4', '%cb%8a', '%cc%81', '%cd%81',
- // grave accent, macron, caron
- '%cc%80', '%cc%84', '%cc%8c',
- ), '', $title );
- // Convert times to x
- $title = str_replace( '%c3%97', 'x', $title );
- }
- $title = preg_replace('/[^%a-z0-9 _-]/', '', $title);
- $title = preg_replace('/\s+/', '-', $title);
- $title = preg_replace('|-+|', '-', $title);
- $title = trim($title, '-');
- return $title;
- }
- /**
- * Ensures a string is a valid SQL order by clause.
- *
- * Accepts one or more columns, with or without ASC/DESC, and also accepts
- * RAND().
- *
- * @since 2.5.1
- *
- * @param string $orderby Order by string to be checked.
- * @return string|bool Returns the order by clause if it is a match, false otherwise.
- */
- function sanitize_sql_orderby( $orderby ){
- preg_match('/^\s*([a-z0-9_]+(\s+(ASC|DESC))?(\s*,\s*|\s*$))+|^\s*RAND\(\s*\)\s*$/i', $orderby, $obmatches);
- if ( !$obmatches )
- return false;
- return $orderby;
- }
- /**
- * Sanitizes an HTML classname to ensure it only contains valid characters.
- *
- * Strips the string down to A-Z,a-z,0-9,_,-. If this results in an empty
- * string then it will return the alternative value supplied.
- *
- * @todo Expand to support the full range of CDATA that a class attribute can contain.
- *
- * @since 2.8.0
- *
- * @param string $class The classname to be sanitized
- * @param string $fallback Optional. The value to return if the sanitization ends up as an empty string.
- * Defaults to an empty string.
- * @return string The sanitized value
- */
- function sanitize_html_class( $class, $fallback = '' ) {
- //Strip out any % encoded octets
- $sanitized = preg_replace( '|%[a-fA-F0-9][a-fA-F0-9]|', '', $class );
- //Limit to A-Z,a-z,0-9,_,-
- $sanitized = preg_replace( '/[^A-Za-z0-9_-]/', '', $sanitized );
- if ( '' == $sanitized )
- $sanitized = $fallback;
- /**
- * Filter a sanitized HTML class string.
- *
- * @since 2.8.0
- *
- * @param string $sanitized The sanitized HTML class.
- * @param string $class HTML class before sanitization.
- * @param string $fallback The fallback string.
- */
- return apply_filters( 'sanitize_html_class', $sanitized, $class, $fallback );
- }
- /**
- * Converts a number of characters from a string.
- *
- * Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are
- * converted into correct XHTML and Unicode characters are converted to the
- * valid range.
- *
- * @since 0.71
- *
- * @param string $content String of characters to be converted.
- * @param string $deprecated Not used.
- * @return string Converted string.
- */
- function convert_chars($content, $deprecated = '') {
- if ( !empty( $deprecated ) )
- _deprecated_argument( __FUNCTION__, '0.71' );
- // Translation of invalid Unicode references range to valid range
- $wp_htmltranswinuni = array(
- '€' => '€', // the Euro sign
- '' => '',
- '‚' => '‚', // these are Windows CP1252 specific characters
- 'ƒ' => 'ƒ', // they would look weird on non-Windows browsers
- '„' => '„',
- '…' => '…',
- '†' => '†',
- '‡' => '‡',
- 'ˆ' => 'ˆ',
- '‰' => '‰',
- 'Š' => 'Š',
- '‹' => '‹',
- 'Œ' => 'Œ',
- '' => '',
- 'Ž' => 'Ž',
- '' => '',
- '' => '',
- '‘' => '‘',
- '’' => '’',
- '“' => '“',
- '”' => '”',
- '•' => '•',
- '–' => '–',
- '—' => '—',
- '˜' => '˜',
- '™' => '™',
- 'š' => 'š',
- '›' => '›',
- 'œ' => 'œ',
- '' => '',
- 'ž' => 'ž',
- 'Ÿ' => 'Ÿ'
- );
- // Remove metadata tags
- $content = preg_replace('/<title>(.+?)<\/title>/','',$content);
- $content = preg_replace('/<category>(.+?)<\/category>/','',$content);
- // Converts lone & characters into & (a.k.a. &)
- $content = preg_replace('/&([^#])(?![a-z1-4]{1,8};)/i', '&$1', $content);
- // Fix Word pasting
- $content = strtr($content, $wp_htmltranswinuni);
- // Just a little XHTML help
- $content = str_replace('<br>', '<br />', $content);
- $content = str_replace('<hr>', '<hr />', $content);
- return $content;
- }
- /**
- * Balances tags if forced to, or if the 'use_balanceTags' option is set to true.
- *
- * @since 0.71
- *
- * @param string $text Text to be balanced
- * @param bool $force If true, forces balancing, ignoring the value of the option. Default false.
- * @return string Balanced text
- */
- function balanceTags( $text, $force = false ) {
- if ( $force || get_option('use_balanceTags') == 1 ) {
- return force_balance_tags( $text );
- } else {
- return $text;
- }
- }
- /**
- * Balances tags of string using a modified stack.
- *
- * @since 2.0.4
- *
- * @author Leonard Lin <leonard@acm.org>
- * @license GPL
- * @copyright November 4, 2001
- * @version 1.1
- * @todo Make better - change loop condition to $text in 1.2
- * @internal Modified by Scott Reilly (coffee2code) 02 Aug 2004
- * 1.1 Fixed handling of append/stack pop order of end text
- * Added Cleaning Hooks
- * 1.0 First Version
- *
- * @param string $text Text to be balanced.
- * @return string Balanced text.
- */
- function force_balance_tags( $text ) {
- $tagstack = array();
- $stacksize = 0;
- $tagqueue = '';
- $newtext = '';
- // Known single-entity/self-closing tags
- $single_tags = array( 'area', 'base', 'basefont', 'br', 'col', 'command', 'embed', 'frame', 'hr', 'img', 'input', 'isindex', 'link', 'meta', 'param', 'source' );
- // Tags that can be immediately nested within themselves
- $nestable_tags = array( 'blockquote', 'div', 'object', 'q', 'span' );
- // WP bug fix for comments - in case you REALLY meant to type '< !--'
- $text = str_replace('< !--', '< !--', $text);
- // WP bug fix for LOVE <3 (and other situations with '<' before a number)
- $text = preg_replace('#<([0-9]{1})#', '<$1', $text);
- while ( preg_match("/<(\/?[\w:]*)\s*([^>]*)>/", $text, $regex) ) {
- $newtext .= $tagqueue;
- $i = strpos($text, $regex[0]);
- $l = strlen($regex[0]);
- // clear the shifter
- $tagqueue = '';
- // Pop or Push
- if ( isset($regex[1][0]) && '/' == $regex[1][0] ) { // End Tag
- $tag = strtolower(substr($regex[1],1));
- // if too many closing tags
- if( $stacksize <= 0 ) {
- $tag = '';
- // or close to be safe $tag = '/' . $tag;
- }
- // if stacktop value = tag close value then pop
- else if ( $tagstack[$stacksize - 1] == $tag ) { // found closing tag
- $tag = '</' . $tag . '>'; // Close Tag
- // Pop
- array_pop( $tagstack );
- $stacksize--;
- } else { // closing tag not at top, search for it
- for ( $j = $stacksize-1; $j >= 0; $j-- ) {
- if ( $tagstack[$j] == $tag ) {
- // add tag to tagqueue
- for ( $k = $stacksize-1; $k >= $j; $k--) {
- $tagqueue .= '</' . array_pop( $tagstack ) . '>';
- $stacksize--;
- }
- break;
- }
- }
- $tag = '';
- }
- } else { // Begin Tag
- $tag = strtolower($regex[1]);
- // Tag Cleaning
- // If it's an empty tag "< >", do nothing
- if ( '' == $tag ) {
- // do nothing
- }
- // ElseIf it presents itself as a self-closing tag...
- elseif ( substr( $regex[2], -1 ) == '/' ) {
- // ...but it isn't a known single-entity self-closing tag, then don't let it be treated as such and
- // immediately close it with a closing tag (the tag will encapsulate no text as a result)
- if ( ! in_array( $tag, $single_tags ) )
- $regex[2] = trim( substr( $regex[2], 0, -1 ) ) . "></$tag";
- }
- // ElseIf it's a known single-entity tag but it doesn't close itself, do so
- elseif ( in_array($tag, $single_tags) ) {
- $regex[2] .= '/';
- }
- // Else it's not a single-entity tag
- else {
- // If the top of the stack is the same as the tag we want to push, close previous tag
- if ( $stacksize > 0 && !in_array($tag, $nestable_tags) && $tagstack[$stacksize - 1] == $tag ) {
- $tagqueue = '</' . array_pop( $tagstack ) . '>';
- $stacksize--;
- }
- $stacksize = array_push( $tagstack, $tag );
- }
- // Attributes
- $attributes = $regex[2];
- if( ! empty( $attributes ) && $attributes[0] != '>' )
- $attributes = ' ' . $attributes;
- $tag = '<' . $tag . $attributes . '>';
- //If already queuing a close tag, then put this tag on, too
- if ( !empty($tagqueue) ) {
- $tagqueue .= $tag;
- $tag = '';
- }
- }
- $newtext .= substr($text, 0, $i) . $tag;
- $text = substr($text, $i + $l);
- }
- // Clear Tag Queue
- $newtext .= $tagqueue;
- // Add Remaining text
- $newtext .= $text;
- // Empty Stack
- while( $x = array_pop($tagstack) )
- $newtext .= '</' . $x . '>'; // Add remaining tags to close
- // WP fix for the bug with HTML comments
- $newtext = str_replace("< !--","<!--",$newtext);
- $newtext = str_replace("< !--","< !--",$newtext);
- return $newtext;
- }
- /**
- * Acts on text which is about to be edited.
- *
- * The $content is run through esc_textarea(), which uses htmlspecialchars()
- * to convert special characters to HTML entities. If $richedit is set to true,
- * it is simply a holder for the 'format_to_edit' filter.
- *
- * @since 0.71
- *
- * @param string $content The text about to be edited.
- * @param bool $richedit Whether the $content should not pass through htmlspecialchars(). Default false (meaning it will be passed).
- * @return string The text after the filter (and possibly htmlspecialchars()) has been run.
- */
- function format_to_edit( $content, $richedit = false ) {
- /**
- * Filter the text to be formatted for editing.
- *
- * @since 1.2.0
- *
- * @param string $content The text, prior to formatting for editing.
- */
- $content = apply_filters( 'format_to_edit', $content );
- if ( ! $richedit )
- $content = esc_textarea( $content );
- return $content;
- }
- /**
- * Add leading zeros when necessary.
- *
- * If you set the threshold to '4' and the number is '10', then you will get
- * back '0010'. If you set the threshold to '4' and the number is '5000', then you
- * will get back '5000'.
- *
- * Uses sprintf to append the amount of zeros based on the $threshold parameter
- * and the size of the number. If the number is large enough, then no zeros will
- * be appended.
- *
- * @since 0.71
- *
- * @param mixed $number Number to append zeros to if not greater than threshold.
- * @param int $threshold Digit places number needs to be to not have zeros added.
- * @return string Adds leading zeros to number if needed.
- */
- function zeroise($number, $threshold) {
- return sprintf('%0'.$threshold.'s', $number);
- }
- /**
- * Adds backslashes before letters and before a number at the start of a string.
- *
- * @since 0.71
- *
- * @param string $string Value to which backslashes will be added.
- * @return string String with backslashes inserted.
- */
- function backslashit($string) {
- if ( isset( $string[0] ) && $string[0] >= '0' && $string[0] <= '9' )
- $string = '\\\\' . $string;
- return addcslashes( $string, 'A..Za..z' );
- }
- /**
- * Appends a trailing slash.
- *
- * Will remove trailing forward and backslashes if it exists already before adding
- * a trailing forward slash. This prevents double slashing a string or path.
- *
- * The primary use of this is for paths and thus should be used for paths. It is
- * not restricted to paths and offers no specific path support.
- *
- * @since 1.2.0
- *
- * @param string $string What to add the trailing slash to.
- * @return string String with trailing slash added.
- */
- function trailingslashit( $string ) {
- return untrailingslashit( $string ) . '/';
- }
- /**
- * Removes trailing forward slashes and backslashes if they exist.
- *
- * The primary use of this is for paths and thus should be used for paths. It is
- * not restricted to paths and offers no specific path support.
- *
- * @since 2.2.0
- *
- * @param string $string What to remove the trailing slashes from.
- * @return string String without the trailing slashes.
- */
- function untrailingslashit( $string ) {
- return rtrim( $string, '/\\' );
- }
- /**
- * Adds slashes to escape strings.
- *
- * Slashes will first be removed if magic_quotes_gpc is set, see {@link
- * http://www.php.net/magic_quotes} for more details.
- *
- * @since 0.71
- *
- * @param string $gpc The string returned from HTTP request data.
- * @return string Returns a string escaped with slashes.
- */
- function addslashes_gpc($gpc) {
- if ( get_magic_quotes_gpc() )
- $gpc = stripslashes($gpc);
- return wp_slash($gpc);
- }
- /**
- * Navigates through an array and removes slashes from the values.
- *
- * If an array is passed, the array_map() function causes a callback to pass the
- * value back to the function. The slashes from this value will removed.
- *
- * @since 2.0.0
- *
- * @param mixed $value The value to be stripped.
- * @return mixed Stripped value.
- */
- function stripslashes_deep($value) {
- if ( is_array($value) ) {
- $value = array_map('stripslashes_deep', $value);
- } elseif ( is_object($value) ) {
- $vars = get_object_vars( $value );
- foreach ($vars as $key=>$data) {
- $value->{$key} = stripslashes_deep( $data );
- }
- } elseif ( is_string( $value ) ) {
- $value = stripslashes($value);
- }
- return $value;
- }
- /**
- * Navigates through an array and encodes the values to be used in a URL.
- *
- *
- * @since 2.2.0
- *
- * @param array|string $value The array or string to be encoded.
- * @return array|string $value The encoded array (or string from the callback).
- */
- function urlencode_deep($value) {
- $value = is_array($value) ? array_map('urlencode_deep', $value) : urlencode($value);
- return $value;
- }
- /**
- * Navigates through an array and raw encodes the values to be used in a URL.
- *
- * @since 3.4.0
- *
- * @param array|string $value The array or string to be encoded.
- * @return array|string $value The encoded array (or string from the callback).
- */
- function rawurlencode_deep( $value ) {
- return is_array( $value ) ? array_map( 'rawurlencode_deep', $value ) : rawurlencode( $value );
- }
- /**
- * Converts email addresses characters to HTML entities to block spam bots.
- *
- * @since 0.71
- *
- * @param string $email_address Email address.
- * @param int $hex_encoding Optional. Set to 1 to enable hex encoding.
- * @return string Converted email address.
- */
- function antispambot( $email_address, $hex_encoding = 0 ) {
- $email_no_spam_address = '';
- for ( $i = 0; $i < strlen( $email_address ); $i++ ) {
- $j = rand( 0, 1 + $hex_encoding );
- if ( $j == 0 ) {
- $email_no_spam_address .= '&#' . ord( $email_address[$i] ) . ';';
- } elseif ( $j == 1 ) {
- $email_no_spam_address .= $email_address[$i];
- } elseif ( $j == 2 ) {
- $email_no_spam_address .= '%' . zeroise( dechex( ord( $email_address[$i] ) ), 2 );
- }
- }
- $email_no_spam_address = str_replace( '@', '@', $email_no_spam_address );
- return $email_no_spam_address;
- }
- /**
- * Callback to convert URI match to HTML A element.
- *
- * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
- * make_clickable()}.
- *
- * @since 2.3.2
- * @access private
- *
- * @param array $matches Single Regex Match.
- * @return string HTML A element with URI address.
- */
- function _make_url_clickable_cb($matches) {
- $url = $matches[2];
- if ( ')' == $matches[3] && strpos( $url, '(' ) ) {
- // If the trailing character is a closing parethesis, and the URL has an opening parenthesis in it, add the closing parenthesis to the URL.
- // Then we can let the parenthesis balancer do its thing below.
- $url .= $matches[3];
- $suffix = '';
- } else {
- $suffix = $matches[3];
- }
- // Include parentheses in the URL only if paired
- while ( substr_count( $url, '(' ) < substr_count( $url, ')' ) ) {
- $suffix = strrchr( $url, ')' ) . $suffix;
- $url = substr( $url, 0, strrpos( $url, ')' ) );
- }
- $url = esc_url($url);
- if ( empty($url) )
- return $matches[0];
- return $matches[1] . "<a href=\"$url\" rel=\"nofollow\">$url</a>" . $suffix;
- }
- /**
- * Callback to convert URL match to HTML A element.
- *
- * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
- * make_clickable()}.
- *
- * @since 2.3.2
- * @access private
- *
- * @param array $matches Single Regex Match.
- * @return string HTML A element with URL address.
- */
- function _make_web_ftp_clickable_cb($matches) {
- $ret = '';
- $dest = $matches[2];
- $dest = 'http://' . $dest;
- $dest = esc_url($dest);
- if ( empty($dest) )
- return $matches[0];
- // removed trailing [.,;:)] from URL
- if ( in_array( substr($dest, -1), array('.', ',', ';', ':', ')') ) === true ) {
- $ret = substr($dest, -1);
- $dest = substr($dest, 0, strlen($dest)-1);
- }
- return $matches[1] . "<a href=\"$dest\" rel=\"nofollow\">$dest</a>$ret";
- }
- /**
- * Callback to convert email address match to HTML A element.
- *
- * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
- * make_clickable()}.
- *
- * @since 2.3.2
- * @access private
- *
- * @param array $matches Single Regex Match.
- * @return string HTML A element with email address.
- */
- function _make_email_clickable_cb($matches) {
- $email = $matches[2] . '@' . $matches[3];
- return $matches[1] . "<a href=\"mailto:$email\">$email</a>";
- }
- /**
- * Convert plaintext URI to HTML links.
- *
- * Converts URI, www and ftp, and email addresses. Finishes by fixing links
- * within links.
- *
- * @since 0.71
- *
- * @param string $text Content to convert URIs.
- * @return string Content with converted URIs.
- */
- function make_clickable( $text ) {
- $r = '';
- $textarr = preg_split( '/(<[^<>]+>)/', $text, -1, PREG_SPLIT_DELIM_CAPTURE ); // split out HTML tags
- $nested_code_pre = 0; // Keep track of how many levels link is nested inside <pre> or <code>
- foreach ( $textarr as $piece ) {
- if ( preg_match( '|^<code[\s>]|i', $piece ) || preg_match( '|^<pre[\s>]|i', $piece ) )
- $nested_code_pre++;
- elseif ( ( '</code>' === strtolower( $piece ) || '</pre>' === strtolower( $piece ) ) && $nested_code_pre )
- $nested_code_pre--;
- if ( $nested_code_pre || empty( $piece ) || ( $piece[0] === '<' && ! preg_match( '|^<\s*[\w]{1,20}+://|', $piece ) ) ) {
- $r .= $piece;
- continue;
- }
- // Long strings might contain expensive edge cases ...
- if ( 10000 < strlen( $piece ) ) {
- // ... break it up
- foreach ( _split_str_by_whitespace( $piece, 2100 ) as $chunk ) { // 2100: Extra room for scheme and leading and trailing paretheses
- if ( 2101 < strlen( $chunk ) ) {
- $r .= $chunk; // Too big, no whitespace: bail.
- } else {
- $r .= make_clickable( $chunk );
- }
- }
- } else {
- $ret = " $piece "; // Pad with whitespace to simplify the regexes
- $url_clickable = '~
- ([\\s(<.,;:!?]) # 1: Leading whitespace, or punctuation
- ( # 2: URL
- [\\w]{1,20}+:// # Scheme and hier-part prefix
- (?=\S{1,2000}\s) # Limit to URLs less than about 2000 characters long
- [\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]*+ # Non-punctuation URL character
- (?: # Unroll the Loop: Only allow puctuation URL character if followed by a non-punctuation URL character
- [\'.,;:!?)] # Punctuation URL character
- [\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]++ # Non-punctuation URL character
- )*
- )
- (\)?) # 3: Trailing closing parenthesis (for parethesis balancing post processing)
- ~xS'; // The regex is a non-anchored pattern and does not have a single fixed starting character.
- // Tell PCRE to spend more time optimizing since, when used on a page load, it will probably be used several times.
- $ret = preg_replace_callback( $url_clickable, '_make_url_clickable_cb', $ret );
- $ret = preg_replace_callback( '#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is', '_make_web_ftp_clickable_cb', $ret );
- $ret = preg_replace_callback( '#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret );
- $ret = substr( $ret, 1, -1 ); // Remove our whitespace padding.
- $r .= $ret;
- }
- }
- // Cleanup of accidental links within links
- $r = preg_replace( '#(<a([ \r\n\t]+[^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i', "$1$3</a>", $r );
- return $r;
- }
- /**
- * Breaks a string into chunks by splitting at whitespace characters.
- * The length of each returned chunk is as close to the specified length goal as possible,
- * with the caveat that each chunk includes its trailing delimiter.
- * Chunks longer than the goal are guaranteed to not have any inner whitespace.
- *
- * Joining the returned chunks with empty delimiters reconstructs the input string losslessly.
- *
- * Input string must have no null characters (or eventual transformations on output chunks must not care about null characters)
- *
- * <code>
- * _split_str_by_whitespace( "1234 67890 1234 67890a cd 1234 890 123456789 1234567890a 45678 1 3 5 7 90 ", 10 ) ==
- * array (
- * 0 => '1234 67890 ', // 11 characters: Perfect split
- * 1 => '1234 ', // 5 characters: '1234 67890a' was too long
- * 2 => '67890a cd ', // 10 characters: '67890a cd 1234' was too long
- * 3 => '1234 890 ', // 11 characters: Perfect split
- * 4 => '123456789 ', // 10 characters: '123456789 1234567890a' was too long
- * 5 => '1234567890a ', // 12 characters: Too long, but no inner whitespace on which to split
- * 6 => ' 45678 ', // 11 characters: Perfect split
- * 7 => '1 3 5 7 9', // 9 characters: End of $string
- * );
- * </code>
- *
- * @since 3.4.0
- * @access private
- *
- * @param string $string The string to split.
- * @param int $goal The desired chunk length.
- * @return array Numeric array of chunks.
- */
- function _split_str_by_whitespace( $string, $goal ) {
- $chunks = array();
- $string_nullspace = strtr( $string, "\r\n\t\v\f ", "\000\000\000\000\000\000" );
- while ( $goal < strlen( $string_nullspace ) ) {
- $pos = strrpos( substr( $string_nullspace, 0, $goal + 1 ), "\000" );
- if ( false === $pos ) {
- $pos = strpos( $string_nullspace, "\000", $goal + 1 );
- if ( false === $pos ) {
- break;
- }
- }
- $chunks[] = substr( $string, 0, $pos + 1 );
- $string = substr( $string, $pos + 1 );
- $string_nullspace = substr( $string_nullspace, $pos + 1 );
- }
- if ( $string ) {
- $chunks[] = $string;
- }
- return $chunks;
- }
- /**
- * Adds rel nofollow string to all HTML A elements in content.
- *
- * @since 1.5.0
- *
- * @param string $text Content that may contain HTML A elements.
- * @return string Converted content.
- */
- function wp_rel_nofollow( $text ) {
- // This is a pre save filter, so text is already escaped.
- $text = stripslashes($text);
- $text = preg_replace_callback('|<a (.+?)>|i', 'wp_rel_nofollow_callback', $text);
- $text = wp_slash($text);
- return $text;
- }
- /**
- * Callback to add rel=nofollow string to HTML A element.
- *
- * Will remove already existing rel="nofollow" and rel='nofollow' from the
- * string to prevent from invalidating (X)HTML.
- *
- * @since 2.3.0
- *
- * @param array $matches Single Match
- * @return string HTML A Element with rel nofollow.
- */
- function wp_rel_nofollow_callback( $matches ) {
- $text = $matches[1];
- $text = str_replace(array(' rel="nofollow"', " rel='nofollow'"), '', $text);
- return "<a $text rel=\"nofollow\">";
- }
- /**
- * Convert one smiley code to the icon graphic file equivalent.
- *
- * Callback handler for {@link convert_smilies()}.
- * Looks up one smiley code in the $wpsmiliestrans global array and returns an
- * <img> string for that smiley.
- *
- * @global array $wpsmiliestrans
- * @since 2.8.0
- *
- * @param array $matches Single match. Smiley code to convert to image.
- * @return string Image string for smiley.
- */
- function translate_smiley( $matches ) {
- global $wpsmiliestrans;
- if ( count( $matches ) == 0 )
- return '';
- $smiley = trim( reset( $matches ) );
- $img = $wpsmiliestrans[ $smiley ];
- /**
- * Filter the Smiley image URL before it's used in the image element.
- *
- * @since 2.9.0
- *
- * @param string $smiley_url URL for the smiley image.
- * @param string $img Filename for the smiley image.
- * @param string $site_url Site URL, as returned by site_url().
- */
- $src_url = apply_filters( 'smilies_src', includes_url( "images/smilies/$img" ), $img, site_url() );
- return sprintf( '<img src="%s" alt="%s" class="wp-smiley" />', esc_url( $src_url ), esc_attr( $smiley ) );
- }
- /**
- * Convert text equivalent of smilies to images.
- *
- * Will only convert smilies if the option 'use_smilies' is true and the global
- * used in the function isn't empty.
- *
- * @since 0.71
- * @uses $wp_smiliessearch
- *
- * @param string $text Content to convert smilies from text.
- * @return string Converted content with text smilies replaced with images.
- */
- function convert_smilies( $text ) {
- global $wp_smiliessearch;
- $output = '';
- if ( get_option( 'use_smilies' ) && ! empty( $wp_smiliessearch ) ) {
- // HTML loop taken from texturize function, could possible be consolidated
- $textarr = preg_split( '/(<.*>)/U', $text, -1, PREG_SPLIT_DELIM_CAPTURE ); // capture the tags as well as in between
- $stop = count( $textarr );// loop stuff
- // Ignore proessing of specific tags
- $tags_to_ignore = 'code|pre|style|script|textarea';
- $ignore_block_element = '';
- for ( $i = 0; $i < $stop; $i++ ) {
- $content = $textarr[$i];
- // If we're in an ignore block, wait until we find its closing tag
- if ( '' == $ignore_block_element && preg_match( '/^<(' . $tags_to_ignore . ')>/', $content, $matches ) ) {
- $ignore_block_element = $matches[1];
- }
- // If it's not a tag and not in ignore block
- if ( '' == $ignore_block_element && strlen( $content ) > 0 && '<' != $content[0] ) {
- $content = preg_replace_callback( $wp_smiliessearch, 'translate_smiley', $content );
- }
- // did we exit ignore block
- if ( '' != $ignore_block_element && '</' . $ignore_block_element . '>' == $content ) {
- $ignore_block_element = '';
- }
- $output .= $content;
- }
- } else {
- // return default text.
- $output = $text;
- }
- return $output;
- }
- /**
- * Verifies that an email is valid.
- *
- * Does not grok i18n domains. Not RFC compliant.
- *
- * @since 0.71
- *
- * @param string $email Email address to verify.
- * @param boolean $deprecated Deprecated.
- * @return string|bool Either false or the valid email address.
- */
- function is_email( $email, $deprecated = false ) {
- if ( ! empty( $deprecated ) )
- _deprecated_argument( __FUNCTION__, '3.0' );
- // Test for the minimum length the email can be
- if ( strlen( $email ) < 3 ) {
- /**
- * Filter whether an email address is valid.
- *
- * This filter is evaluated under several different contexts, such as 'email_too_short',
- * 'email_no_at', 'local_invalid_chars', 'domain_period_sequence', 'domain_period_limits',
- * 'domain_no_periods', 'sub_hyphen_limits', 'sub_invalid_chars', or no specific context.
- *
- * @since 2.8.0
- *
- * @param bool $is_email Whether the email address has passed the is_email() checks. Default false.
- * @param string $email The email address being checked.
- * @param string $message An explanatory message to the user.
- * @param string $context Context under which the email was tested.
- */
- return apply_filters( 'is_email', false, $email, 'email_too_short' );
- }
- // Test for an @ character after the first position
- if ( strpos( $email, '@', 1 ) === false ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'is_email', false, $email, 'email_no_at' );
- }
- // Split out the local and domain parts
- list( $local, $domain ) = explode( '@', $email, 2 );
- // LOCAL PART
- // Test for invalid characters
- if ( !preg_match( '/^[a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]+$/', $local ) ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'is_email', false, $email, 'local_invalid_chars' );
- }
- // DOMAIN PART
- // Test for sequences of periods
- if ( preg_match( '/\.{2,}/', $domain ) ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'is_email', false, $email, 'domain_period_sequence' );
- }
- // Test for leading and trailing periods and whitespace
- if ( trim( $domain, " \t\n\r\0\x0B." ) !== $domain ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'is_email', false, $email, 'domain_period_limits' );
- }
- // Split the domain into subs
- $subs = explode( '.', $domain );
- // Assume the domain will have at least two subs
- if ( 2 > count( $subs ) ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'is_email', false, $email, 'domain_no_periods' );
- }
- // Loop through each sub
- foreach ( $subs as $sub ) {
- // Test for leading and trailing hyphens and whitespace
- if ( trim( $sub, " \t\n\r\0\x0B-" ) !== $sub ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'is_email', false, $email, 'sub_hyphen_limits' );
- }
- // Test for invalid characters
- if ( !preg_match('/^[a-z0-9-]+$/i', $sub ) ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'is_email', false, $email, 'sub_invalid_chars' );
- }
- }
- // Congratulations your email made it!
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'is_email', $email, $email, null );
- }
- /**
- * Convert to ASCII from email subjects.
- *
- * @since 1.2.0
- *
- * @param string $string Subject line
- * @return string Converted string to ASCII
- */
- function wp_iso_descrambler($string) {
- /* this may only work with iso-8859-1, I'm afraid */
- if (!preg_match('#\=\?(.+)\?Q\?(.+)\?\=#i', $string, $matches)) {
- return $string;
- } else {
- $subject = str_replace('_', ' ', $matches[2]);
- $subject = preg_replace_callback('#\=([0-9a-f]{2})#i', '_wp_iso_convert', $subject);
- return $subject;
- }
- }
- /**
- * Helper function to convert hex encoded chars to ASCII
- *
- * @since 3.1.0
- * @access private
- *
- * @param array $match The preg_replace_callback matches array
- * @return array Converted chars
- */
- function _wp_iso_convert( $match ) {
- return chr( hexdec( strtolower( $match[1] ) ) );
- }
- /**
- * Returns a date in the GMT equivalent.
- *
- * Requires and returns a date in the Y-m-d H:i:s format. If there is a
- * timezone_string available, the date is assumed to be in that timezone,
- * otherwise it simply subtracts the value of the 'gmt_offset' option. Return
- * format can be overridden using the $format parameter.
- *
- * @since 1.2.0
- *
- * @uses get_option() to retrieve the value of 'gmt_offset'.
- * @param string $string The date to be converted.
- * @param string $format The format string for the returned date (default is Y-m-d H:i:s)
- * @return string GMT version of the date provided.
- */
- function get_gmt_from_date( $string, $format = 'Y-m-d H:i:s' ) {
- $tz = get_option( 'timezone_string' );
- if ( $tz ) {
- $datetime = date_create( $string, new DateTimeZone( $tz ) );
- if ( ! $datetime )
- return gmdate( $format, 0 );
- $datetime->setTimezone( new DateTimeZone( 'UTC' ) );
- $string_gmt = $datetime->format( $format );
- } else {
- if ( ! preg_match( '#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches ) )
- return gmdate( $format, 0 );
- $string_time = gmmktime( $matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1] );
- $string_gmt = gmdate( $format, $string_time - get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );
- }
- return $string_gmt;
- }
- /**
- * Converts a GMT date into the correct format for the blog.
- *
- * Requires and returns a date in the Y-m-d H:i:s format. If there is a
- * timezone_string available, the returned date is in that timezone, otherwise
- * it simply adds the value of gmt_offset. Return format can be overridden
- * using the $format parameter
- *
- * @since 1.2.0
- *
- * @param string $string The date to be converted.
- * @param string $format The format string for the returned date (default is Y-m-d H:i:s)
- * @return string Formatted date relative to the timezone / GMT offset.
- */
- function get_date_from_gmt( $string, $format = 'Y-m-d H:i:s' ) {
- $tz = get_option( 'timezone_string' );
- if ( $tz ) {
- $datetime = date_create( $string, new DateTimeZone( 'UTC' ) );
- if ( ! $datetime )
- return date( $format, 0 );
- $datetime->setTimezone( new DateTimeZone( $tz ) );
- $string_localtime = $datetime->format( $format );
- } else {
- if ( ! preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches) )
- return date( $format, 0 );
- $string_time = gmmktime( $matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1] );
- $string_localtime = gmdate( $format, $string_time + get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );
- }
- return $string_localtime;
- }
- /**
- * Computes an offset in seconds from an iso8601 timezone.
- *
- * @since 1.5.0
- *
- * @param string $timezone Either 'Z' for 0 offset or '±hhmm'.
- * @return int|float The offset in seconds.
- */
- function iso8601_timezone_to_offset($timezone) {
- // $timezone is either 'Z' or '[+|-]hhmm'
- if ($timezone == 'Z') {
- $offset = 0;
- } else {
- $sign = (substr($timezone, 0, 1) == '+') ? 1 : -1;
- $hours = intval(substr($timezone, 1, 2));
- $minutes = intval(substr($timezone, 3, 4)) / 60;
- $offset = $sign * HOUR_IN_SECONDS * ($hours + $minutes);
- }
- return $offset;
- }
- /**
- * Converts an iso8601 date to MySQL DateTime format used by post_date[_gmt].
- *
- * @since 1.5.0
- *
- * @param string $date_string Date and time in ISO 8601 format {@link http://en.wikipedia.org/wiki/ISO_8601}.
- * @param string $timezone Optional. If set to GMT returns the time minus gmt_offset. Default is 'user'.
- * @return string The date and time in MySQL DateTime format - Y-m-d H:i:s.
- */
- function iso8601_to_datetime($date_string, $timezone = 'user') {
- $timezone = strtolower($timezone);
- if ($timezone == 'gmt') {
- preg_match('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', $date_string, $date_bits);
- if (!empty($date_bits[7])) { // we have a timezone, so let's compute an offset
- $offset = iso8601_timezone_to_offset($date_bits[7]);
- } else { // we don't have a timezone, so we assume user local timezone (not server's!)
- $offset = HOUR_IN_SECONDS * get_option('gmt_offset');
- }
- $timestamp = gmmktime($date_bits[4], $date_bits[5], $date_bits[6], $date_bits[2], $date_bits[3], $date_bits[1]);
- $timestamp -= $offset;
- return gmdate('Y-m-d H:i:s', $timestamp);
- } else if ($timezone == 'user') {
- return preg_replace('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', '$1-$2-$3 $4:$5:$6', $date_string);
- }
- }
- /**
- * Adds a element attributes to open links in new windows.
- *
- * Comment text in popup windows should be filtered through this. Right now it's
- * a moderately dumb function, ideally it would detect whether a target or rel
- * attribute was already there and adjust its actions accordingly.
- *
- * @since 0.71
- *
- * @param string $text Content to replace links to open in a new window.
- * @return string Content that has filtered links.
- */
- function popuplinks($text) {
- $text = preg_replace('/<a (.+?)>/i', "<a $1 target='_blank' rel='external'>", $text);
- return $text;
- }
- /**
- * Strips out all characters that are not allowable in an email.
- *
- * @since 1.5.0
- *
- * @param string $email Email address to filter.
- * @return string Filtered email address.
- */
- function sanitize_email( $email ) {
- // Test for the minimum length the email can be
- if ( strlen( $email ) < 3 ) {
- /**
- * Filter a sanitized email address.
- *
- * This filter is evaluated under several contexts, including 'email_too_short',
- * 'email_no_at', 'local_invalid_chars', 'domain_period_sequence', 'domain_period_limits',
- * 'domain_no_periods', 'domain_no_valid_subs', or no context.
- *
- * @since 2.8.0
- *
- * @param string $email The sanitized email address.
- * @param string $email The email address, as provided to sanitize_email().
- * @param string $message A message to pass to the user.
- */
- return apply_filters( 'sanitize_email', '', $email, 'email_too_short' );
- }
- // Test for an @ character after the first position
- if ( strpos( $email, '@', 1 ) === false ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'sanitize_email', '', $email, 'email_no_at' );
- }
- // Split out the local and domain parts
- list( $local, $domain ) = explode( '@', $email, 2 );
- // LOCAL PART
- // Test for invalid characters
- $local = preg_replace( '/[^a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]/', '', $local );
- if ( '' === $local ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'sanitize_email', '', $email, 'local_invalid_chars' );
- }
- // DOMAIN PART
- // Test for sequences of periods
- $domain = preg_replace( '/\.{2,}/', '', $domain );
- if ( '' === $domain ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'sanitize_email', '', $email, 'domain_period_sequence' );
- }
- // Test for leading and trailing periods and whitespace
- $domain = trim( $domain, " \t\n\r\0\x0B." );
- if ( '' === $domain ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'sanitize_email', '', $email, 'domain_period_limits' );
- }
- // Split the domain into subs
- $subs = explode( '.', $domain );
- // Assume the domain will have at least two subs
- if ( 2 > count( $subs ) ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'sanitize_email', '', $email, 'domain_no_periods' );
- }
- // Create an array that will contain valid subs
- $new_subs = array();
- // Loop through each sub
- foreach ( $subs as $sub ) {
- // Test for leading and trailing hyphens
- $sub = trim( $sub, " \t\n\r\0\x0B-" );
- // Test for invalid characters
- $sub = preg_replace( '/[^a-z0-9-]+/i', '', $sub );
- // If there's anything left, add it to the valid subs
- if ( '' !== $sub ) {
- $new_subs[] = $sub;
- }
- }
- // If there aren't 2 or more valid subs
- if ( 2 > count( $new_subs ) ) {
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'sanitize_email', '', $email, 'domain_no_valid_subs' );
- }
- // Join valid subs into the new domain
- $domain = join( '.', $new_subs );
- // Put the email back together
- $email = $local . '@' . $domain;
- // Congratulations your email made it!
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'sanitize_email', $email, $email, null );
- }
- /**
- * Determines the difference between two timestamps.
- *
- * The difference is returned in a human readable format such as "1 hour",
- * "5 mins", "2 days".
- *
- * @since 1.5.0
- *
- * @param int $from Unix timestamp from which the difference begins.
- * @param int $to Optional. Unix timestamp to end the time difference. Default becomes time() if not set.
- * @return string Human readable time difference.
- */
- function human_time_diff( $from, $to = '' ) {
- if ( empty( $to ) ) {
- $to = time();
- }
- $diff = (int) abs( $to - $from );
- if ( $diff < HOUR_IN_SECONDS ) {
- $mins = round( $diff / MINUTE_IN_SECONDS );
- if ( $mins <= 1 )
- $mins = 1;
- /* translators: min=minute */
- $since = sprintf( _n( '%s min', '%s mins', $mins ), $mins );
- } elseif ( $diff < DAY_IN_SECONDS && $diff >= HOUR_IN_SECONDS ) {
- $hours = round( $diff / HOUR_IN_SECONDS );
- if ( $hours <= 1 )
- $hours = 1;
- $since = sprintf( _n( '%s hour', '%s hours', $hours ), $hours );
- } elseif ( $diff < WEEK_IN_SECONDS && $diff >= DAY_IN_SECONDS ) {
- $days = round( $diff / DAY_IN_SECONDS );
- if ( $days <= 1 )
- $days = 1;
- $since = sprintf( _n( '%s day', '%s days', $days ), $days );
- } elseif ( $diff < 30 * DAY_IN_SECONDS && $diff >= WEEK_IN_SECONDS ) {
- $weeks = round( $diff / WEEK_IN_SECONDS );
- if ( $weeks <= 1 )
- $weeks = 1;
- $since = sprintf( _n( '%s week', '%s weeks', $weeks ), $weeks );
- } elseif ( $diff < YEAR_IN_SECONDS && $diff >= 30 * DAY_IN_SECONDS ) {
- $months = round( $diff / ( 30 * DAY_IN_SECONDS ) );
- if ( $months <= 1 )
- $months = 1;
- $since = sprintf( _n( '%s month', '%s months', $months ), $months );
- } elseif ( $diff >= YEAR_IN_SECONDS ) {
- $years = round( $diff / YEAR_IN_SECONDS );
- if ( $years <= 1 )
- $years = 1;
- $since = sprintf( _n( '%s year', '%s years', $years ), $years );
- }
- /**
- * Filter the human readable difference between two timestamps.
- *
- * @since 4.0.0
- *
- * @param string $since The difference in human readable text.
- * @param int $diff The difference in seconds.
- * @param int $from Unix timestamp from which the difference begins.
- * @param int $to Unix timestamp to end the time difference.
- */
- return apply_filters( 'human_time_diff', $since, $diff, $from, $to );
- }
- /**
- * Generates an excerpt from the content, if needed.
- *
- * The excerpt word amount will be 55 words and if the amount is greater than
- * that, then the string ' […]' will be appended to the excerpt. If the string
- * is less than 55 words, then the content will be returned as is.
- *
- * The 55 word limit can be modified by plugins/themes using the excerpt_length filter
- * The ' […]' string can be modified by plugins/themes using the excerpt_more filter
- *
- * @since 1.5.0
- *
- * @param string $text Optional. The excerpt. If set to empty, an excerpt is generated.
- * @return string The excerpt.
- */
- function wp_trim_excerpt($text = '') {
- $raw_excerpt = $text;
- if ( '' == $text ) {
- $text = get_the_content('');
- $text = strip_shortcodes( $text );
- /** This filter is documented in wp-includes/post-template.php */
- $text = apply_filters( 'the_content', $text );
- $text = str_replace(']]>', ']]>', $text);
- /**
- * Filter the number of words in an excerpt.
- *
- * @since 2.7.0
- *
- * @param int $number The number of words. Default 55.
- */
- $excerpt_length = apply_filters( 'excerpt_length', 55 );
- /**
- * Filter the string in the "more" link displayed after a trimmed excerpt.
- *
- * @since 2.9.0
- *
- * @param string $more_string The string shown within the more link.
- */
- $excerpt_more = apply_filters( 'excerpt_more', ' ' . '[…]' );
- $text = wp_trim_words( $text, $excerpt_length, $excerpt_more );
- }
- /**
- * Filter the trimmed excerpt string.
- *
- * @since 2.8.0
- *
- * @param string $text The trimmed text.
- * @param string $raw_excerpt The text prior to trimming.
- */
- return apply_filters( 'wp_trim_excerpt', $text, $raw_excerpt );
- }
- /**
- * Trims text to a certain number of words.
- *
- * This function is localized. For languages that count 'words' by the individual
- * character (such as East Asian languages), the $num_words argument will apply
- * to the number of individual characters.
- *
- * @since 3.3.0
- *
- * @param string $text Text to trim.
- * @param int $num_words Number of words. Default 55.
- * @param string $more Optional. What to append if $text needs to be trimmed. Default '…'.
- * @return string Trimmed text.
- */
- function wp_trim_words( $text, $num_words = 55, $more = null ) {
- if ( null === $more )
- $more = __( '…' );
- $original_text = $text;
- $text = wp_strip_all_tags( $text );
- /* translators: If your word count is based on single characters (East Asian characters),
- enter 'characters'. Otherwise, enter 'words'. Do not translate into your own language. */
- if ( 'characters' == _x( 'words', 'word count: words or characters?' ) && preg_match( '/^utf\-?8$/i', get_option( 'blog_charset' ) ) ) {
- $text = trim( preg_replace( "/[\n\r\t ]+/", ' ', $text ), ' ' );
- preg_match_all( '/./u', $text, $words_array );
- $words_array = array_slice( $words_array[0], 0, $num_words + 1 );
- $sep = '';
- } else {
- $words_array = preg_split( "/[\n\r\t ]+/", $text, $num_words + 1, PREG_SPLIT_NO_EMPTY );
- $sep = ' ';
- }
- if ( count( $words_array ) > $num_words ) {
- array_pop( $words_array );
- $text = implode( $sep, $words_array );
- $text = $text . $more;
- } else {
- $text = implode( $sep, $words_array );
- }
- /**
- * Filter the text content after words have been trimmed.
- *
- * @since 3.3.0
- *
- * @param string $text The trimmed text.
- * @param int $num_words The number of words to trim the text to. Default 5.
- * @param string $more An optional string to append to the end of the trimmed text, e.g. ….
- * @param string $original_text The text before it was trimmed.
- */
- return apply_filters( 'wp_trim_words', $text, $num_words, $more, $original_text );
- }
- /**
- * Converts named entities into numbered entities.
- *
- * @since 1.5.1
- *
- * @param string $text The text within which entities will be converted.
- * @return string Text with converted entities.
- */
- function ent2ncr($text) {
- /**
- * Filter text before named entities are converted into numbered entities.
- *
- * A non-null string must be returned for the filter to be evaluated.
- *
- * @since 3.3.0
- *
- * @param null $converted_text The text to be converted. Default null.
- * @param string $text The text prior to entity conversion.
- */
- $filtered = apply_filters( 'pre_ent2ncr', null, $text );
- if( null !== $filtered )
- return $filtered;
- $to_ncr = array(
- '"' => '"',
- '&' => '&',
- '<' => '<',
- '>' => '>',
- '|' => '|',
- ' ' => ' ',
- '¡' => '¡',
- '¢' => '¢',
- '£' => '£',
- '¤' => '¤',
- '¥' => '¥',
- '¦' => '¦',
- '&brkbar;' => '¦',
- '§' => '§',
- '¨' => '¨',
- '¨' => '¨',
- '©' => '©',
- 'ª' => 'ª',
- '«' => '«',
- '¬' => '¬',
- '­' => '­',
- '®' => '®',
- '¯' => '¯',
- '&hibar;' => '¯',
- '°' => '°',
- '±' => '±',
- '²' => '²',
- '³' => '³',
- '´' => '´',
- 'µ' => 'µ',
- '¶' => '¶',
- '·' => '·',
- '¸' => '¸',
- '¹' => '¹',
- 'º' => 'º',
- '»' => '»',
- '¼' => '¼',
- '½' => '½',
- '¾' => '¾',
- '¿' => '¿',
- 'À' => 'À',
- 'Á' => 'Á',
- 'Â' => 'Â',
- 'Ã' => 'Ã',
- 'Ä' => 'Ä',
- 'Å' => 'Å',
- 'Æ' => 'Æ',
- 'Ç' => 'Ç',
- 'È' => 'È',
- 'É' => 'É',
- 'Ê' => 'Ê',
- 'Ë' => 'Ë',
- 'Ì' => 'Ì',
- 'Í' => 'Í',
- 'Î' => 'Î',
- 'Ï' => 'Ï',
- 'Ð' => 'Ð',
- 'Ñ' => 'Ñ',
- 'Ò' => 'Ò',
- 'Ó' => 'Ó',
- 'Ô' => 'Ô',
- 'Õ' => 'Õ',
- 'Ö' => 'Ö',
- '×' => '×',
- 'Ø' => 'Ø',
- 'Ù' => 'Ù',
- 'Ú' => 'Ú',
- 'Û' => 'Û',
- 'Ü' => 'Ü',
- 'Ý' => 'Ý',
- 'Þ' => 'Þ',
- 'ß' => 'ß',
- 'à' => 'à',
- 'á' => 'á',
- 'â' => 'â',
- 'ã' => 'ã',
- 'ä' => 'ä',
- 'å' => 'å',
- 'æ' => 'æ',
- 'ç' => 'ç',
- 'è' => 'è',
- 'é' => 'é',
- 'ê' => 'ê',
- 'ë' => 'ë',
- 'ì' => 'ì',
- 'í' => 'í',
- 'î' => 'î',
- 'ï' => 'ï',
- 'ð' => 'ð',
- 'ñ' => 'ñ',
- 'ò' => 'ò',
- 'ó' => 'ó',
- 'ô' => 'ô',
- 'õ' => 'õ',
- 'ö' => 'ö',
- '÷' => '÷',
- 'ø' => 'ø',
- 'ù' => 'ù',
- 'ú' => 'ú',
- 'û' => 'û',
- 'ü' => 'ü',
- 'ý' => 'ý',
- 'þ' => 'þ',
- 'ÿ' => 'ÿ',
- 'Œ' => 'Œ',
- 'œ' => 'œ',
- 'Š' => 'Š',
- 'š' => 'š',
- 'Ÿ' => 'Ÿ',
- 'ƒ' => 'ƒ',
- 'ˆ' => 'ˆ',
- '˜' => '˜',
- 'Α' => 'Α',
- 'Β' => 'Β',
- 'Γ' => 'Γ',
- 'Δ' => 'Δ',
- 'Ε' => 'Ε',
- 'Ζ' => 'Ζ',
- 'Η' => 'Η',
- 'Θ' => 'Θ',
- 'Ι' => 'Ι',
- 'Κ' => 'Κ',
- 'Λ' => 'Λ',
- 'Μ' => 'Μ',
- 'Ν' => 'Ν',
- 'Ξ' => 'Ξ',
- 'Ο' => 'Ο',
- 'Π' => 'Π',
- 'Ρ' => 'Ρ',
- 'Σ' => 'Σ',
- 'Τ' => 'Τ',
- 'Υ' => 'Υ',
- 'Φ' => 'Φ',
- 'Χ' => 'Χ',
- 'Ψ' => 'Ψ',
- 'Ω' => 'Ω',
- 'α' => 'α',
- 'β' => 'β',
- 'γ' => 'γ',
- 'δ' => 'δ',
- 'ε' => 'ε',
- 'ζ' => 'ζ',
- 'η' => 'η',
- 'θ' => 'θ',
- 'ι' => 'ι',
- 'κ' => 'κ',
- 'λ' => 'λ',
- 'μ' => 'μ',
- 'ν' => 'ν',
- 'ξ' => 'ξ',
- 'ο' => 'ο',
- 'π' => 'π',
- 'ρ' => 'ρ',
- 'ς' => 'ς',
- 'σ' => 'σ',
- 'τ' => 'τ',
- 'υ' => 'υ',
- 'φ' => 'φ',
- 'χ' => 'χ',
- 'ψ' => 'ψ',
- 'ω' => 'ω',
- 'ϑ' => 'ϑ',
- 'ϒ' => 'ϒ',
- 'ϖ' => 'ϖ',
- ' ' => ' ',
- ' ' => ' ',
- ' ' => ' ',
- '‌' => '‌',
- '‍' => '‍',
- '‎' => '‎',
- '‏' => '‏',
- '–' => '–',
- '—' => '—',
- '‘' => '‘',
- '’' => '’',
- '‚' => '‚',
- '“' => '“',
- '”' => '”',
- '„' => '„',
- '†' => '†',
- '‡' => '‡',
- '•' => '•',
- '…' => '…',
- '‰' => '‰',
- '′' => '′',
- '″' => '″',
- '‹' => '‹',
- '›' => '›',
- '‾' => '‾',
- '⁄' => '⁄',
- '€' => '€',
- 'ℑ' => 'ℑ',
- '℘' => '℘',
- 'ℜ' => 'ℜ',
- '™' => '™',
- 'ℵ' => 'ℵ',
- '↵' => '↵',
- '⇐' => '⇐',
- '⇑' => '⇑',
- '⇒' => '⇒',
- '⇓' => '⇓',
- '⇔' => '⇔',
- '∀' => '∀',
- '∂' => '∂',
- '∃' => '∃',
- '∅' => '∅',
- '∇' => '∇',
- '∈' => '∈',
- '∉' => '∉',
- '∋' => '∋',
- '∏' => '∏',
- '∑' => '∑',
- '−' => '−',
- '∗' => '∗',
- '√' => '√',
- '∝' => '∝',
- '∞' => '∞',
- '∠' => '∠',
- '∧' => '∧',
- '∨' => '∨',
- '∩' => '∩',
- '∪' => '∪',
- '∫' => '∫',
- '∴' => '∴',
- '∼' => '∼',
- '≅' => '≅',
- '≈' => '≈',
- '≠' => '≠',
- '≡' => '≡',
- '≤' => '≤',
- '≥' => '≥',
- '⊂' => '⊂',
- '⊃' => '⊃',
- '⊄' => '⊄',
- '⊆' => '⊆',
- '⊇' => '⊇',
- '⊕' => '⊕',
- '⊗' => '⊗',
- '⊥' => '⊥',
- '⋅' => '⋅',
- '⌈' => '⌈',
- '⌉' => '⌉',
- '⌊' => '⌊',
- '⌋' => '⌋',
- '⟨' => '〈',
- '⟩' => '〉',
- '←' => '←',
- '↑' => '↑',
- '→' => '→',
- '↓' => '↓',
- '↔' => '↔',
- '◊' => '◊',
- '♠' => '♠',
- '♣' => '♣',
- '♥' => '♥',
- '♦' => '♦'
- );
- return str_replace( array_keys($to_ncr), array_values($to_ncr), $text );
- }
- /**
- * Formats text for the rich text editor.
- *
- * The filter 'richedit_pre' is applied here. If $text is empty the filter will
- * be applied to an empty string.
- *
- * @since 2.0.0
- *
- * @param string $text The text to be formatted.
- * @return string The formatted text after filter is applied.
- */
- function wp_richedit_pre($text) {
- if ( empty( $text ) ) {
- /**
- * Filter text returned for the rich text editor.
- *
- * This filter is first evaluated, and the value returned, if an empty string
- * is passed to wp_richedit_pre(). If an empty string is passed, it results
- * in a break tag and line feed.
- *
- * If a non-empty string is passed, the filter is evaluated on the wp_richedit_pre()
- * return after being formatted.
- *
- * @since 2.0.0
- *
- * @param string $output Text for the rich text editor.
- */
- return apply_filters( 'richedit_pre', '' );
- }
- $output = convert_chars($text);
- $output = wpautop($output);
- $output = htmlspecialchars($output, ENT_NOQUOTES, get_option( 'blog_charset' ) );
- /** This filter is documented in wp-includes/formatting.php */
- return apply_filters( 'richedit_pre', $output );
- }
- /**
- * Formats text for the HTML editor.
- *
- * Unless $output is empty it will pass through htmlspecialchars before the
- * 'htmledit_pre' filter is applied.
- *
- * @since 2.5.0
- *
- * @param string $output The text to be formatted.
- * @return string Formatted text after filter applied.
- */
- function wp_htmledit_pre($output) {
- if ( !empty($output) )
- $output = htmlspecialchars($output, ENT_NOQUOTES, get_option( 'blog_charset' ) ); // convert only < > &
- /**
- * Filter the text before it is formatted for the HTML editor.
- *
- * @since 2.5.0
- *
- * @param string $output The HTML-formatted text.
- */
- return apply_filters( 'htmledit_pre', $output );
- }
- /**
- * Perform a deep string replace operation to ensure the values in $search are no longer present
- *
- * Repeats the replacement operation until it no longer replaces anything so as to remove "nested" values
- * e.g. $subject = '%0%0%0DDD', $search ='%0D', $result ='' rather than the '%0%0DD' that
- * str_replace would return
- *
- * @since 2.8.1
- * @access private
- *
- * @param string|array $search The value being searched for, otherwise known as the needle. An array may be used to designate multiple needles.
- * @param string $subject The string being searched and replaced on, otherwise known as the haystack.
- * @return string The string with the replaced svalues.
- */
- function _deep_replace( $search, $subject ) {
- $subject = (string) $subject;
- $count = 1;
- while ( $count ) {
- $subject = str_replace( $search, '', $subject, $count );
- }
- return $subject;
- }
- /**
- * Escapes data for use in a MySQL query.
- *
- * Usually you should prepare queries using wpdb::prepare().
- * Sometimes, spot-escaping is required or useful. One example
- * is preparing an array for use in an IN clause.
- *
- * @since 2.8.0
- * @param string|array $data Unescaped data
- * @return string|array Escaped data
- */
- function esc_sql( $data ) {
- global $wpdb;
- return $wpdb->_escape( $data );
- }
- /**
- * Checks and cleans a URL.
- *
- * A number of characters are removed from the URL. If the URL is for displaying
- * (the default behaviour) ampersands are also replaced. The 'clean_url' filter
- * is applied to the returned cleaned URL.
- *
- * @since 2.8.0
- * @uses wp_kses_bad_protocol() To only permit protocols in the URL set
- * via $protocols or the common ones set in the function.
- *
- * @param string $url The URL to be cleaned.
- * @param array $protocols Optional. An array of acceptable protocols.
- * Defaults to 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn' if not set.
- * @param string $_context Private. Use esc_url_raw() for database usage.
- * @return string The cleaned $url after the 'clean_url' filter is applied.
- */
- function esc_url( $url, $protocols = null, $_context = 'display' ) {
- $original_url = $url;
- if ( '' == $url )
- return $url;
- $url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%@$\|*\'()\\x80-\\xff]|i', '', $url);
- $strip = array('%0d', '%0a', '%0D', '%0A');
- $url = _deep_replace($strip, $url);
- $url = str_replace(';//', '://', $url);
- /* If the URL doesn't appear to contain a scheme, we
- * presume it needs http:// appended (unless a relative
- * link starting with /, # or ? or a php file).
- */
- if ( strpos($url, ':') === false && ! in_array( $url[0], array( '/', '#', '?' ) ) &&
- ! preg_match('/^[a-z0-9-]+?\.php/i', $url) )
- $url = 'http://' . $url;
- // Replace ampersands and single quotes only when displaying.
- if ( 'display' == $_context ) {
- $url = wp_kses_normalize_entities( $url );
- $url = str_replace( '&', '&', $url );
- $url = str_replace( "'", ''', $url );
- }
- if ( '/' === $url[0] ) {
- $good_protocol_url = $url;
- } else {
- if ( ! is_array( $protocols ) )
- $protocols = wp_allowed_protocols();
- $good_protocol_url = wp_kses_bad_protocol( $url, $protocols );
- if ( strtolower( $good_protocol_url ) != strtolower( $url ) )
- return '';
- }
- /**
- * Filter a string cleaned and escaped for output as a URL.
- *
- * @since 2.3.0
- *
- * @param string $good_protocol_url The cleaned URL to be returned.
- * @param string $original_url The URL prior to cleaning.
- * @param string $_context If 'display', replace ampersands and single quotes only.
- */
- return apply_filters( 'clean_url', $good_protocol_url, $original_url, $_context );
- }
- /**
- * Performs esc_url() for database usage.
- *
- * @since 2.8.0
- * @uses esc_url()
- *
- * @param string $url The URL to be cleaned.
- * @param array $protocols An array of acceptable protocols.
- * @return string The cleaned URL.
- */
- function esc_url_raw( $url, $protocols = null ) {
- return esc_url( $url, $protocols, 'db' );
- }
- /**
- * Convert entities, while preserving already-encoded entities.
- *
- * @link http://www.php.net/htmlentities Borrowed from the PHP Manual user notes.
- *
- * @since 1.2.2
- *
- * @param string $myHTML The text to be converted.
- * @return string Converted text.
- */
- function htmlentities2($myHTML) {
- $translation_table = get_html_translation_table( HTML_ENTITIES, ENT_QUOTES );
- $translation_table[chr(38)] = '&';
- return preg_replace( "/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,3};)/", "&", strtr($myHTML, $translation_table) );
- }
- /**
- * Escape single quotes, htmlspecialchar " < > &, and fix line endings.
- *
- * Escapes text strings for echoing in JS. It is intended to be used for inline JS
- * (in a tag attribute, for example onclick="..."). Note that the strings have to
- * be in single quotes. The filter 'js_escape' is also applied here.
- *
- * @since 2.8.0
- *
- * @param string $text The text to be escaped.
- * @return string Escaped text.
- */
- function esc_js( $text ) {
- $safe_text = wp_check_invalid_utf8( $text );
- $safe_text = _wp_specialchars( $safe_text, ENT_COMPAT );
- $safe_text = preg_replace( '/&#(x)?0*(?(1)27|39);?/i', "'", stripslashes( $safe_text ) );
- $safe_text = str_replace( "\r", '', $safe_text );
- $safe_text = str_replace( "\n", '\\n', addslashes( $safe_text ) );
- /**
- * Filter a string cleaned and escaped for output in JavaScript.
- *
- * Text passed to esc_js() is stripped of invalid or special characters,
- * and properly slashed for output.
- *
- * @since 2.0.6
- *
- * @param string $safe_text The text after it has been escaped.
- * @param string $text The text prior to being escaped.
- */
- return apply_filters( 'js_escape', $safe_text, $text );
- }
- /**
- * Escaping for HTML blocks.
- *
- * @since 2.8.0
- *
- * @param string $text
- * @return string
- */
- function esc_html( $text ) {
- $safe_text = wp_check_invalid_utf8( $text );
- $safe_text = _wp_specialchars( $safe_text, ENT_QUOTES );
- /**
- * Filter a string cleaned and escaped for output in HTML.
- *
- * Text passed to esc_html() is stripped of invalid or special characters
- * before output.
- *
- * @since 2.8.0
- *
- * @param string $safe_text The text after it has been escaped.
- * @param string $text The text prior to being escaped.
- */
- return apply_filters( 'esc_html', $safe_text, $text );
- }
- /**
- * Escaping for HTML attributes.
- *
- * @since 2.8.0
- *
- * @param string $text
- * @return string
- */
- function esc_attr( $text ) {
- $safe_text = wp_check_invalid_utf8( $text );
- $safe_text = _wp_specialchars( $safe_text, ENT_QUOTES );
- /**
- * Filter a string cleaned and escaped for output in an HTML attribute.
- *
- * Text passed to esc_attr() is stripped of invalid or special characters
- * before output.
- *
- * @since 2.0.6
- *
- * @param string $safe_text The text after it has been escaped.
- * @param string $text The text prior to being escaped.
- */
- return apply_filters( 'attribute_escape', $safe_text, $text );
- }
- /**
- * Escaping for textarea values.
- *
- * @since 3.1.0
- *
- * @param string $text
- * @return string
- */
- function esc_textarea( $text ) {
- $safe_text = htmlspecialchars( $text, ENT_QUOTES, get_option( 'blog_charset' ) );
- /**
- * Filter a string cleaned and escaped for output in a textarea element.
- *
- * @since 3.1.0
- *
- * @param string $safe_text The text after it has been escaped.
- * @param string $text The text prior to being escaped.
- */
- return apply_filters( 'esc_textarea', $safe_text, $text );
- }
- /**
- * Escape an HTML tag name.
- *
- * @since 2.5.0
- *
- * @param string $tag_name
- * @return string
- */
- function tag_escape($tag_name) {
- $safe_tag = strtolower( preg_replace('/[^a-zA-Z0-9_:]/', '', $tag_name) );
- /**
- * Filter a string cleaned and escaped for output as an HTML tag.
- *
- * @since 2.8.0
- *
- * @param string $safe_tag The tag name after it has been escaped.
- * @param string $tag_name The text before it was escaped.
- */
- return apply_filters( 'tag_escape', $safe_tag, $tag_name );
- }
- /**
- * Convert full URL paths to absolute paths.
- *
- * Removes the http or https protocols and the domain. Keeps the path '/' at the
- * beginning, so it isn't a true relative link, but from the web root base.
- *
- * @since 2.1.0
- *
- * @param string $link Full URL path.
- * @return string Absolute path.
- */
- function wp_make_link_relative( $link ) {
- return preg_replace( '|https?://[^/]+(/.*)|i', '$1', $link );
- }
- /**
- * Sanitises various option values based on the nature of the option.
- *
- * This is basically a switch statement which will pass $value through a number
- * of functions depending on the $option.
- *
- * @since 2.0.5
- *
- * @param string $option The name of the option.
- * @param string $value The unsanitised value.
- * @return string Sanitized value.
- */
- function sanitize_option($option, $value) {
- switch ( $option ) {
- case 'admin_email' :
- case 'new_admin_email' :
- $value = sanitize_email( $value );
- if ( ! is_email( $value ) ) {
- $value = get_option( $option ); // Resets option to stored value in the case of failed sanitization
- if ( function_exists( 'add_settings_error' ) )
- add_settings_error( $option, 'invalid_admin_email', __( 'The email address entered did not appear to be a valid email address. Please enter a valid email address.' ) );
- }
- break;
- case 'thumbnail_size_w':
- case 'thumbnail_size_h':
- case 'medium_size_w':
- case 'medium_size_h':
- case 'large_size_w':
- case 'large_size_h':
- case 'mailserver_port':
- case 'comment_max_links':
- case 'page_on_front':
- case 'page_for_posts':
- case 'rss_excerpt_length':
- case 'default_category':
- case 'default_email_category':
- case 'default_link_category':
- case 'close_comments_days_old':
- case 'comments_per_page':
- case 'thread_comments_depth':
- case 'users_can_register':
- case 'start_of_week':
- $value = absint( $value );
- break;
- case 'posts_per_page':
- case 'posts_per_rss':
- $value = (int) $value;
- if ( empty($value) )
- $value = 1;
- if ( $value < -1 )
- $value = abs($value);
- break;
- case 'default_ping_status':
- case 'default_comment_status':
- // Options that if not there have 0 value but need to be something like "closed"
- if ( $value == '0' || $value == '')
- $value = 'closed';
- break;
- case 'blogdescription':
- case 'blogname':
- $value = wp_kses_post( $value );
- $value = esc_html( $value );
- break;
- case 'blog_charset':
- $value = preg_replace('/[^a-zA-Z0-9_-]/', '', $value); // strips slashes
- break;
- case 'blog_public':
- // This is the value if the settings checkbox is not checked on POST. Don't rely on this.
- if ( null === $value )
- $value = 1;
- else
- $value = intval( $value );
- break;
- case 'date_format':
- case 'time_format':
- case 'mailserver_url':
- case 'mailserver_login':
- case 'mailserver_pass':
- case 'upload_path':
- $value = strip_tags( $value );
- $value = wp_kses_data( $value );
- break;
- case 'ping_sites':
- $value = explode( "\n", $value );
- $value = array_filter( array_map( 'trim', $value ) );
- $value = array_filter( array_map( 'esc_url_raw', $value ) );
- $value = implode( "\n", $value );
- break;
- case 'gmt_offset':
- $value = preg_replace('/[^0-9:.-]/', '', $value); // strips slashes
- break;
- case 'siteurl':
- if ( (bool)preg_match( '#http(s?)://(.+)#i', $value) ) {
- $value = esc_url_raw($value);
- } else {
- $value = get_option( $option ); // Resets option to stored value in the case of failed sanitization
- if ( function_exists('add_settings_error') )
- add_settings_error('siteurl', 'invalid_siteurl', __('The WordPress address you entered did not appear to be a valid URL. Please enter a valid URL.'));
- }
- break;
- case 'home':
- if ( (bool)preg_match( '#http(s?)://(.+)#i', $value) ) {
- $value = esc_url_raw($value);
- } else {
- $value = get_option( $option ); // Resets option to stored value in the case of failed sanitization
- if ( function_exists('add_settings_error') )
- add_settings_error('home', 'invalid_home', __('The Site address you entered did not appear to be a valid URL. Please enter a valid URL.'));
- }
- break;
- case 'WPLANG':
- $allowed = get_available_languages();
- if ( ! is_multisite() && defined( 'WPLANG' ) && '' !== WPLANG && 'en_US' !== WPLANG ) {
- $allowed[] = WPLANG;
- }
- if ( ! in_array( $value, $allowed ) && ! empty( $value ) ) {
- $value = get_option( $option );
- }
- break;
- case 'illegal_names':
- if ( ! is_array( $value ) )
- $value = explode( ' ', $value );
- $value = array_values( array_filter( array_map( 'trim', $value ) ) );
- if ( ! $value )
- $value = '';
- break;
- case 'limited_email_domains':
- case 'banned_email_domains':
- if ( ! is_array( $value ) )
- $value = explode( "\n", $value );
- $domains = array_values( array_filter( array_map( 'trim', $value ) ) );
- $value = array();
- foreach ( $domains as $domain ) {
- if ( ! preg_match( '/(--|\.\.)/', $domain ) && preg_match( '|^([a-zA-Z0-9-\.])+$|', $domain ) )
- $value[] = $domain;
- }
- if ( ! $value )
- $value = '';
- break;
- case 'timezone_string':
- $allowed_zones = timezone_identifiers_list();
- if ( ! in_array( $value, $allowed_zones ) && ! empty( $value ) ) {
- $value = get_option( $option ); // Resets option to stored value in the case of failed sanitization
- if ( function_exists('add_settings_error') )
- add_settings_error('timezone_string', 'invalid_timezone_string', __('The timezone you have entered is not valid. Please select a valid timezone.') );
- }
- break;
- case 'permalink_structure':
- case 'category_base':
- case 'tag_base':
- $value = esc_url_raw( $value );
- $value = str_replace( 'http://', '', $value );
- break;
- case 'default_role' :
- if ( ! get_role( $value ) && get_role( 'subscriber' ) )
- $value = 'subscriber';
- break;
- case 'moderation_keys':
- case 'blacklist_keys':
- $value = explode( "\n", $value );
- $value = array_filter( array_map( 'trim', $value ) );
- $value = array_unique( $value );
- $value = implode( "\n", $value );
- break;
- }
- /**
- * Filter an option value following sanitization.
- *
- * @since 2.3.0
- *
- * @param string $value The sanitized option value.
- * @param string $option The option name.
- */
- $value = apply_filters( "sanitize_option_{$option}", $value, $option );
- return $value;
- }
- /**
- * Parses a string into variables to be stored in an array.
- *
- * Uses {@link http://www.php.net/parse_str parse_str()} and stripslashes if
- * {@link http://www.php.net/magic_quotes magic_quotes_gpc} is on.
- *
- * @since 2.2.1
- *
- * @param string $string The string to be parsed.
- * @param array $array Variables will be stored in this array.
- */
- function wp_parse_str( $string, &$array ) {
- parse_str( $string, $array );
- if ( get_magic_quotes_gpc() )
- $array = stripslashes_deep( $array );
- /**
- * Filter the array of variables derived from a parsed string.
- *
- * @since 2.3.0
- *
- * @param array $array The array populated with variables.
- */
- $array = apply_filters( 'wp_parse_str', $array );
- }
- /**
- * Convert lone less than signs.
- *
- * KSES already converts lone greater than signs.
- *
- * @uses wp_pre_kses_less_than_callback in the callback function.
- * @since 2.3.0
- *
- * @param string $text Text to be converted.
- * @return string Converted text.
- */
- function wp_pre_kses_less_than( $text ) {
- return preg_replace_callback('%<[^>]*?((?=<)|>|$)%', 'wp_pre_kses_less_than_callback', $text);
- }
- /**
- * Callback function used by preg_replace.
- *
- * @uses esc_html to format the $matches text.
- * @since 2.3.0
- *
- * @param array $matches Populated by matches to preg_replace.
- * @return string The text returned after esc_html if needed.
- */
- function wp_pre_kses_less_than_callback( $matches ) {
- if ( false === strpos($matches[0], '>') )
- return esc_html($matches[0]);
- return $matches[0];
- }
- /**
- * WordPress implementation of PHP sprintf() with filters.
- *
- * @since 2.5.0
- * @link http://www.php.net/sprintf
- *
- * @param string $pattern The string which formatted args are inserted.
- * @param mixed $args,... Arguments to be formatted into the $pattern string.
- * @return string The formatted string.
- */
- function wp_sprintf( $pattern ) {
- $args = func_get_args();
- $len = strlen($pattern);
- $start = 0;
- $result = '';
- $arg_index = 0;
- while ( $len > $start ) {
- // Last character: append and break
- if ( strlen($pattern) - 1 == $start ) {
- $result .= substr($pattern, -1);
- break;
- }
- // Literal %: append and continue
- if ( substr($pattern, $start, 2) == '%%' ) {
- $start += 2;
- $result .= '%';
- continue;
- }
- // Get fragment before next %
- $end = strpos($pattern, '%', $start + 1);
- if ( false === $end )
- $end = $len;
- $fragment = substr($pattern, $start, $end - $start);
- // Fragment has a specifier
- if ( $pattern[$start] == '%' ) {
- // Find numbered arguments or take the next one in order
- if ( preg_match('/^%(\d+)\$/', $fragment, $matches) ) {
- $arg = isset($args[$matches[1]]) ? $args[$matches[1]] : '';
- $fragment = str_replace("%{$matches[1]}$", '%', $fragment);
- } else {
- ++$arg_index;
- $arg = isset($args[$arg_index]) ? $args[$arg_index] : '';
- }
- /**
- * Filter a fragment from the pattern passed to wp_sprintf().
- *
- * If the fragment is unchanged, then sprintf() will be run on the fragment.
- *
- * @since 2.5.0
- *
- * @param string $fragment A fragment from the pattern.
- * @param string $arg The argument.
- */
- $_fragment = apply_filters( 'wp_sprintf', $fragment, $arg );
- if ( $_fragment != $fragment )
- $fragment = $_fragment;
- else
- $fragment = sprintf($fragment, strval($arg) );
- }
- // Append to result and move to next fragment
- $result .= $fragment;
- $start = $end;
- }
- return $result;
- }
- /**
- * Localize list items before the rest of the content.
- *
- * The '%l' must be at the first characters can then contain the rest of the
- * content. The list items will have ', ', ', and', and ' and ' added depending
- * on the amount of list items in the $args parameter.
- *
- * @since 2.5.0
- *
- * @param string $pattern Content containing '%l' at the beginning.
- * @param array $args List items to prepend to the content and replace '%l'.
- * @return string Localized list items and rest of the content.
- */
- function wp_sprintf_l($pattern, $args) {
- // Not a match
- if ( substr($pattern, 0, 2) != '%l' )
- return $pattern;
- // Nothing to work with
- if ( empty($args) )
- return '';
- /**
- * Filter the translated delimiters used by wp_sprintf_l().
- * Placeholders (%s) are included to assist translators and then
- * removed before the array of strings reaches the filter.
- *
- * Please note: Ampersands and entities should be avoided here.
- *
- * @since 2.5.0
- *
- * @param array $delimiters An array of translated delimiters.
- */
- $l = apply_filters( 'wp_sprintf_l', array(
- /* translators: used to join items in a list with more than 2 items */
- 'between' => sprintf( __('%s, %s'), '', '' ),
- /* translators: used to join last two items in a list with more than 2 times */
- 'between_last_two' => sprintf( __('%s, and %s'), '', '' ),
- /* translators: used to join items in a list with only 2 items */
- 'between_only_two' => sprintf( __('%s and %s'), '', '' ),
- ) );
- $args = (array) $args;
- $result = array_shift($args);
- if ( count($args) == 1 )
- $result .= $l['between_only_two'] . array_shift($args);
- // Loop when more than two args
- $i = count($args);
- while ( $i ) {
- $arg = array_shift($args);
- $i--;
- if ( 0 == $i )
- $result .= $l['between_last_two'] . $arg;
- else
- $result .= $l['between'] . $arg;
- }
- return $result . substr($pattern, 2);
- }
- /**
- * Safely extracts not more than the first $count characters from html string.
- *
- * UTF-8, tags and entities safe prefix extraction. Entities inside will *NOT*
- * be counted as one character. For example & will be counted as 4, < as
- * 3, etc.
- *
- * @since 2.5.0
- *
- * @param string $str String to get the excerpt from.
- * @param integer $count Maximum number of characters to take.
- * @param string $more Optional. What to append if $str needs to be trimmed. Defaults to empty string.
- * @return string The excerpt.
- */
- function wp_html_excerpt( $str, $count, $more = null ) {
- if ( null === $more )
- $more = '';
- $str = wp_strip_all_tags( $str, true );
- $excerpt = mb_substr( $str, 0, $count );
- // remove part of an entity at the end
- $excerpt = preg_replace( '/&[^;\s]{0,6}$/', '', $excerpt );
- if ( $str != $excerpt )
- $excerpt = trim( $excerpt ) . $more;
- return $excerpt;
- }
- /**
- * Add a Base url to relative links in passed content.
- *
- * By default it supports the 'src' and 'href' attributes. However this can be
- * changed via the 3rd param.
- *
- * @since 2.7.0
- *
- * @param string $content String to search for links in.
- * @param string $base The base URL to prefix to links.
- * @param array $attrs The attributes which should be processed.
- * @return string The processed content.
- */
- function links_add_base_url( $content, $base, $attrs = array('src', 'href') ) {
- global $_links_add_base;
- $_links_add_base = $base;
- $attrs = implode('|', (array)$attrs);
- return preg_replace_callback( "!($attrs)=(['\"])(.+?)\\2!i", '_links_add_base', $content );
- }
- /**
- * Callback to add a base url to relative links in passed content.
- *
- * @since 2.7.0
- * @access private
- *
- * @param string $m The matched link.
- * @return string The processed link.
- */
- function _links_add_base($m) {
- global $_links_add_base;
- //1 = attribute name 2 = quotation mark 3 = URL
- return $m[1] . '=' . $m[2] .
- ( preg_match( '#^(\w{1,20}):#', $m[3], $protocol ) && in_array( $protocol[1], wp_allowed_protocols() ) ?
- $m[3] :
- path_join( $_links_add_base, $m[3] ) )
- . $m[2];
- }
- /**
- * Adds a Target attribute to all links in passed content.
- *
- * This function by default only applies to <a> tags, however this can be
- * modified by the 3rd param.
- *
- * <b>NOTE:</b> Any current target attributed will be stripped and replaced.
- *
- * @since 2.7.0
- *
- * @param string $content String to search for links in.
- * @param string $target The Target to add to the links.
- * @param array $tags An array of tags to apply to.
- * @return string The processed content.
- */
- function links_add_target( $content, $target = '_blank', $tags = array('a') ) {
- global $_links_add_target;
- $_links_add_target = $target;
- $tags = implode('|', (array)$tags);
- return preg_replace_callback( "!<($tags)([^>]*)>!i", '_links_add_target', $content );
- }
- /**
- * Callback to add a target attribute to all links in passed content.
- *
- * @since 2.7.0
- * @access private
- *
- * @param string $m The matched link.
- * @return string The processed link.
- */
- function _links_add_target( $m ) {
- global $_links_add_target;
- $tag = $m[1];
- $link = preg_replace('|( target=([\'"])(.*?)\2)|i', '', $m[2]);
- return '<' . $tag . $link . ' target="' . esc_attr( $_links_add_target ) . '">';
- }
- /**
- * Normalize EOL characters and strip duplicate whitespace.
- *
- * @since 2.7.0
- *
- * @param string $str The string to normalize.
- * @return string The normalized string.
- */
- function normalize_whitespace( $str ) {
- $str = trim( $str );
- $str = str_replace( "\r", "\n", $str );
- $str = preg_replace( array( '/\n+/', '/[ \t]+/' ), array( "\n", ' ' ), $str );
- return $str;
- }
- /**
- * Properly strip all HTML tags including script and style
- *
- * This differs from strip_tags() because it removes the contents of
- * the <script> and <style> tags. E.g. strip_tags( '<script>something</script>' )
- * will return 'something'. wp_strip_all_tags will return ''
- *
- * @since 2.9.0
- *
- * @param string $string String containing HTML tags
- * @param bool $remove_breaks optional Whether to remove left over line breaks and white space chars
- * @return string The processed string.
- */
- function wp_strip_all_tags($string, $remove_breaks = false) {
- $string = preg_replace( '@<(script|style)[^>]*?>.*?</\\1>@si', '', $string );
- $string = strip_tags($string);
- if ( $remove_breaks )
- $string = preg_replace('/[\r\n\t ]+/', ' ', $string);
- return trim( $string );
- }
- /**
- * Sanitize a string from user input or from the db
- *
- * check for invalid UTF-8,
- * Convert single < characters to entity,
- * strip all tags,
- * remove line breaks, tabs and extra white space,
- * strip octets.
- *
- * @since 2.9.0
- *
- * @param string $str
- * @return string
- */
- function sanitize_text_field($str) {
- $filtered = wp_check_invalid_utf8( $str );
- if ( strpos($filtered, '<') !== false ) {
- $filtered = wp_pre_kses_less_than( $filtered );
- // This will strip extra whitespace for us.
- $filtered = wp_strip_all_tags( $filtered, true );
- } else {
- $filtered = trim( preg_replace('/[\r\n\t ]+/', ' ', $filtered) );
- }
- $found = false;
- while ( preg_match('/%[a-f0-9]{2}/i', $filtered, $match) ) {
- $filtered = str_replace($match[0], '', $filtered);
- $found = true;
- }
- if ( $found ) {
- // Strip out the whitespace that may now exist after removing the octets.
- $filtered = trim( preg_replace('/ +/', ' ', $filtered) );
- }
- /**
- * Filter a sanitized text field string.
- *
- * @since 2.9.0
- *
- * @param string $filtered The sanitized string.
- * @param string $str The string prior to being sanitized.
- */
- return apply_filters( 'sanitize_text_field', $filtered, $str );
- }
- /**
- * i18n friendly version of basename()
- *
- * @since 3.1.0
- *
- * @param string $path A path.
- * @param string $suffix If the filename ends in suffix this will also be cut off.
- * @return string
- */
- function wp_basename( $path, $suffix = '' ) {
- return urldecode( basename( str_replace( array( '%2F', '%5C' ), '/', urlencode( $path ) ), $suffix ) );
- }
- /**
- * Forever eliminate "Wordpress" from the planet (or at least the little bit we can influence).
- *
- * Violating our coding standards for a good function name.
- *
- * @since 3.0.0
- */
- function capital_P_dangit( $text ) {
- // Simple replacement for titles
- $current_filter = current_filter();
- if ( 'the_title' === $current_filter || 'wp_title' === $current_filter )
- return str_replace( 'Wordpress', 'WordPress', $text );
- // Still here? Use the more judicious replacement
- static $dblq = false;
- if ( false === $dblq )
- $dblq = _x( '“', 'opening curly double quote' );
- return str_replace(
- array( ' Wordpress', '‘Wordpress', $dblq . 'Wordpress', '>Wordpress', '(Wordpress' ),
- array( ' WordPress', '‘WordPress', $dblq . 'WordPress', '>WordPress', '(WordPress' ),
- $text );
- }
- /**
- * Sanitize a mime type
- *
- * @since 3.1.3
- *
- * @param string $mime_type Mime type
- * @return string Sanitized mime type
- */
- function sanitize_mime_type( $mime_type ) {
- $sani_mime_type = preg_replace( '/[^-+*.a-zA-Z0-9\/]/', '', $mime_type );
- /**
- * Filter a mime type following sanitization.
- *
- * @since 3.1.3
- *
- * @param string $sani_mime_type The sanitized mime type.
- * @param string $mime_type The mime type prior to sanitization.
- */
- return apply_filters( 'sanitize_mime_type', $sani_mime_type, $mime_type );
- }
- /**
- * Sanitize space or carriage return separated URLs that are used to send trackbacks.
- *
- * @since 3.4.0
- *
- * @param string $to_ping Space or carriage return separated URLs
- * @return string URLs starting with the http or https protocol, separated by a carriage return.
- */
- function sanitize_trackback_urls( $to_ping ) {
- $urls_to_ping = preg_split( '/[\r\n\t ]/', trim( $to_ping ), -1, PREG_SPLIT_NO_EMPTY );
- foreach ( $urls_to_ping as $k => $url ) {
- if ( !preg_match( '#^https?://.#i', $url ) )
- unset( $urls_to_ping[$k] );
- }
- $urls_to_ping = array_map( 'esc_url_raw', $urls_to_ping );
- $urls_to_ping = implode( "\n", $urls_to_ping );
- /**
- * Filter a list of trackback URLs following sanitization.
- *
- * The string returned here consists of a space or carriage return-delimited list
- * of trackback URLs.
- *
- * @since 3.4.0
- *
- * @param string $urls_to_ping Sanitized space or carriage return separated URLs.
- * @param string $to_ping Space or carriage return separated URLs before sanitization.
- */
- return apply_filters( 'sanitize_trackback_urls', $urls_to_ping, $to_ping );
- }
- /**
- * Add slashes to a string or array of strings.
- *
- * This should be used when preparing data for core API that expects slashed data.
- * This should not be used to escape data going directly into an SQL query.
- *
- * @since 3.6.0
- *
- * @param string|array $value String or array of strings to slash.
- * @return string|array Slashed $value
- */
- function wp_slash( $value ) {
- if ( is_array( $value ) ) {
- foreach ( $value as $k => $v ) {
- if ( is_array( $v ) ) {
- $value[$k] = wp_slash( $v );
- } else {
- $value[$k] = addslashes( $v );
- }
- }
- } else {
- $value = addslashes( $value );
- }
- return $value;
- }
- /**
- * Remove slashes from a string or array of strings.
- *
- * This should be used to remove slashes from data passed to core API that
- * expects data to be unslashed.
- *
- * @since 3.6.0
- *
- * @param string|array $value String or array of strings to unslash.
- * @return string|array Unslashed $value
- */
- function wp_unslash( $value ) {
- return stripslashes_deep( $value );
- }
- /**
- * Extract and return the first URL from passed content.
- *
- * @since 3.6.0
- *
- * @param string $content A string which might contain a URL.
- * @return string The found URL.
- */
- function get_url_in_content( $content ) {
- if ( empty( $content ) ) {
- return false;
- }
- if ( preg_match( '/<a\s[^>]*?href=([\'"])(.+?)\1/is', $content, $matches ) ) {
- return esc_url_raw( $matches[2] );
- }
- return false;
- }
- /**
- * Returns the regexp for common whitespace characters.
- *
- * By default, spaces include new lines, tabs, nbsp entities, and the UTF-8 nbsp.
- * This is designed to replace the PCRE \s sequence. In ticket #22692, that
- * sequence was found to be unreliable due to random inclusion of the A0 byte.
- *
- * @since 4.0.0
- *
- * @return string The spaces regexp.
- */
- function wp_spaces_regexp() {
- static $spaces;
- if ( empty( $spaces ) ) {
- /**
- * Filter the regexp for common whitespace characters.
- *
- * This string is substituted for the \s sequence as needed in regular
- * expressions. For websites not written in English, different characters
- * may represent whitespace. For websites not encoded in UTF-8, the 0xC2 0xA0
- * sequence may not be in use.
- *
- * @since 4.0.0
- *
- * @param string $spaces Regexp pattern for matching common whitespace characters.
- */
- $spaces = apply_filters( 'wp_spaces_regexp', '[\r\n\t ]|\xC2\xA0| ' );
- }
- return $spaces;
- }