/wp-includes/functions.php

Large files files are truncated, but you can click here to view the full file

<?php

/**

 * Main WordPress API

 *

 * @package WordPress

 */



require( ABSPATH . WPINC . '/option.php' );



/**

 * Convert given date string into a different format.

 *

 * $format should be either a PHP date format string, e.g. 'U' for a Unix

 * timestamp, or 'G' for a Unix timestamp assuming that $date is GMT.

 *

 * If $translate is true then the given date and format string will

 * be passed to date_i18n() for translation.

 *

 * @since 0.71

 *

 * @param string $format    Format of the date to return.

 * @param string $date      Date string to convert.

 * @param bool   $translate Whether the return date should be translated. Default true.

 * @return string|int|bool Formatted date string or Unix timestamp. False if $date is empty.

 */

function mysql2date( $format, $date, $translate = true ) {

	if ( empty( $date ) )

		return false;



	if ( 'G' == $format )

		return strtotime( $date . ' +0000' );



	$i = strtotime( $date );



	if ( 'U' == $format )

		return $i;



	if ( $translate )

		return date_i18n( $format, $i );

	else

		return date( $format, $i );

}



/**

 * Retrieve the current time based on specified type.

 *

 * The 'mysql' type will return the time in the format for MySQL DATETIME field.

 * The 'timestamp' type will return the current timestamp.

 * Other strings will be interpreted as PHP date formats (e.g. 'Y-m-d').

 *

 * If $gmt is set to either '1' or 'true', then both types will use GMT time.

 * if $gmt is false, the output is adjusted with the GMT offset in the WordPress option.

 *

 * @since 1.0.0

 *

 * @param string   $type Type of time to retrieve. Accepts 'mysql', 'timestamp', or PHP date

 *                       format string (e.g. 'Y-m-d').

 * @param int|bool $gmt  Optional. Whether to use GMT timezone. Default false.

 * @return int|string Integer if $type is 'timestamp', string otherwise.

 */

function current_time( $type, $gmt = 0 ) {

	switch ( $type ) {

		case 'mysql':

			return ( $gmt ) ? gmdate( 'Y-m-d H:i:s' ) : gmdate( 'Y-m-d H:i:s', ( time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS ) ) );

		case 'timestamp':

			return ( $gmt ) ? time() : time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );

		default:

			return ( $gmt ) ? date( $type ) : date( $type, time() + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS ) );

	}

}



/**

 * Retrieve the date in localized format, based on timestamp.

 *

 * If the locale specifies the locale month and weekday, then the locale will

 * take over the format for the date. If it isn't, then the date format string

 * will be used instead.

 *

 * @since 0.71

 *

 * @param string   $dateformatstring Format to display the date.

 * @param bool|int $unixtimestamp    Optional. Unix timestamp. Default false.

 * @param bool     $gmt              Optional. Whether to use GMT timezone. Default false.

 *

 * @return string The date, translated if locale specifies it.

 */

function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {

	global $wp_locale;

	$i = $unixtimestamp;



	if ( false === $i ) {

		if ( ! $gmt )

			$i = current_time( 'timestamp' );

		else

			$i = time();

		// we should not let date() interfere with our

		// specially computed timestamp

		$gmt = true;

	}



	/*

	 * Store original value for language with untypical grammars.

	 * See http://core.trac.wordpress.org/ticket/9396

	 */

	$req_format = $dateformatstring;



	$datefunc = $gmt? 'gmdate' : 'date';



	if ( ( !empty( $wp_locale->month ) ) && ( !empty( $wp_locale->weekday ) ) ) {

		$datemonth = $wp_locale->get_month( $datefunc( 'm', $i ) );

		$datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );

		$dateweekday = $wp_locale->get_weekday( $datefunc( 'w', $i ) );

		$dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );

		$datemeridiem = $wp_locale->get_meridiem( $datefunc( 'a', $i ) );

		$datemeridiem_capital = $wp_locale->get_meridiem( $datefunc( 'A', $i ) );

		$dateformatstring = ' '.$dateformatstring;

		$dateformatstring = preg_replace( "/([^\\\])D/", "\\1" . backslashit( $dateweekday_abbrev ), $dateformatstring );

		$dateformatstring = preg_replace( "/([^\\\])F/", "\\1" . backslashit( $datemonth ), $dateformatstring );

		$dateformatstring = preg_replace( "/([^\\\])l/", "\\1" . backslashit( $dateweekday ), $dateformatstring );

		$dateformatstring = preg_replace( "/([^\\\])M/", "\\1" . backslashit( $datemonth_abbrev ), $dateformatstring );

		$dateformatstring = preg_replace( "/([^\\\])a/", "\\1" . backslashit( $datemeridiem ), $dateformatstring );

		$dateformatstring = preg_replace( "/([^\\\])A/", "\\1" . backslashit( $datemeridiem_capital ), $dateformatstring );



		$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );

	}

	$timezone_formats = array( 'P', 'I', 'O', 'T', 'Z', 'e' );

	$timezone_formats_re = implode( '|', $timezone_formats );

	if ( preg_match( "/$timezone_formats_re/", $dateformatstring ) ) {

		$timezone_string = get_option( 'timezone_string' );

		if ( $timezone_string ) {

			$timezone_object = timezone_open( $timezone_string );

			$date_object = date_create( null, $timezone_object );

			foreach( $timezone_formats as $timezone_format ) {

				if ( false !== strpos( $dateformatstring, $timezone_format ) ) {

					$formatted = date_format( $date_object, $timezone_format );

					$dateformatstring = ' '.$dateformatstring;

					$dateformatstring = preg_replace( "/([^\\\])$timezone_format/", "\\1" . backslashit( $formatted ), $dateformatstring );

					$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );

				}

			}

		}

	}

	$j = @$datefunc( $dateformatstring, $i );



	/**

	 * Filter the date formatted based on the locale.

	 *

	 * @since 2.8.0

	 *

	 * @param string $j          Formatted date string.

	 * @param string $req_format Format to display the date.

	 * @param int    $i          Unix timestamp.

	 * @param bool   $gmt        Whether to convert to GMT for time. Default false.

	 */

	$j = apply_filters( 'date_i18n', $j, $req_format, $i, $gmt );

	return $j;

}



/**

 * Convert integer number to format based on the locale.

 *

 * @since 2.3.0

 *

 * @param int $number   The number to convert based on locale.

 * @param int $decimals Optional. Precision of the number of decimal places. Default 0.

 * @return string Converted number in string format.

 */

function number_format_i18n( $number, $decimals = 0 ) {

	global $wp_locale;

	$formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep'] );



	/**

	 * Filter the number formatted based on the locale.

	 *

	 * @since  2.8.0

	 *

	 * @param string $formatted Converted number in string format.

	 */

	return apply_filters( 'number_format_i18n', $formatted );

}



/**

 * Convert number of bytes largest unit bytes will fit into.

 *

 * It is easier to read 1kB than 1024 bytes and 1MB than 1048576 bytes. Converts

 * number of bytes to human readable number by taking the number of that unit

 * that the bytes will go into it. Supports TB value.

 *

 * Please note that integers in PHP are limited to 32 bits, unless they are on

 * 64 bit architecture, then they have 64 bit size. If you need to place the

 * larger size then what PHP integer type will hold, then use a string. It will

 * be converted to a double, which should always have 64 bit length.

 *

 * Technically the correct unit names for powers of 1024 are KiB, MiB etc.

 *

 * @since 2.3.0

 *

 * @param int|string $bytes    Number of bytes. Note max integer size for integers.

 * @param int        $decimals Optional. Precision of number of decimal places. Default 0.

 * @return bool|string False on failure. Number string on success.

 */

function size_format( $bytes, $decimals = 0 ) {

	$quant = array(

		// ========================= Origin ====

		'TB' => 1099511627776,  // pow( 1024, 4)

		'GB' => 1073741824,     // pow( 1024, 3)

		'MB' => 1048576,        // pow( 1024, 2)

		'kB' => 1024,           // pow( 1024, 1)

		'B ' => 1,              // pow( 1024, 0)

	);

	foreach ( $quant as $unit => $mag )

		if ( doubleval($bytes) >= $mag )

			return number_format_i18n( $bytes / $mag, $decimals ) . ' ' . $unit;



	return false;

}



/**

 * Get the week start and end from the datetime or date string from MySQL.

 *

 * @since 0.71

 *

 * @param string     $mysqlstring   Date or datetime field type from MySQL.

 * @param int|string $start_of_week Optional. Start of the week as an integer. Default empty string.

 * @return array Keys are 'start' and 'end'.

 */

function get_weekstartend( $mysqlstring, $start_of_week = '' ) {

	// MySQL string year.

	$my = substr( $mysqlstring, 0, 4 );



	// MySQL string month.

	$mm = substr( $mysqlstring, 8, 2 );



	// MySQL string day.

	$md = substr( $mysqlstring, 5, 2 );



	// The timestamp for MySQL string day.

	$day = mktime( 0, 0, 0, $md, $mm, $my );



	// The day of the week from the timestamp.

	$weekday = date( 'w', $day );



	if ( !is_numeric($start_of_week) )

		$start_of_week = get_option( 'start_of_week' );



	if ( $weekday < $start_of_week )

		$weekday += 7;



	// The most recent week start day on or before $day.

	$start = $day - DAY_IN_SECONDS * ( $weekday - $start_of_week );



	// $start + 7 days - 1 second.

	$end = $start + 7 * DAY_IN_SECONDS - 1;

	return compact( 'start', 'end' );

}



/**

 * Unserialize value only if it was serialized.

 *

 * @since 2.0.0

 *

 * @param string $original Maybe unserialized original, if is needed.

 * @return mixed Unserialized data can be any type.

 */

function maybe_unserialize( $original ) {

	if ( is_serialized( $original ) ) // don't attempt to unserialize data that wasn't serialized going in

		return @unserialize( $original );

	return $original;

}



/**

 * Check value to find if it was serialized.

 *

 * If $data is not an string, then returned value will always be false.

 * Serialized data is always a string.

 *

 * @since 2.0.5

 *

 * @param string $data   Value to check to see if was serialized.

 * @param bool   $strict Optional. Whether to be strict about the end of the string. Default true.

 * @return bool False if not serialized and true if it was.

 */

function is_serialized( $data, $strict = true ) {

	// if it isn't a string, it isn't serialized.

	if ( ! is_string( $data ) ) {

		return false;

	}

	$data = trim( $data );

 	if ( 'N;' == $data ) {

		return true;

	}

	if ( strlen( $data ) < 4 ) {

		return false;

	}

	if ( ':' !== $data[1] ) {

		return false;

	}

	if ( $strict ) {

		$lastc = substr( $data, -1 );

		if ( ';' !== $lastc && '}' !== $lastc ) {

			return false;

		}

	} else {

		$semicolon = strpos( $data, ';' );

		$brace     = strpos( $data, '}' );

		// Either ; or } must exist.

		if ( false === $semicolon && false === $brace )

			return false;

		// But neither must be in the first X characters.

		if ( false !== $semicolon && $semicolon < 3 )

			return false;

		if ( false !== $brace && $brace < 4 )

			return false;

	}

	$token = $data[0];

	switch ( $token ) {

		case 's' :

			if ( $strict ) {

				if ( '"' !== substr( $data, -2, 1 ) ) {

					return false;

				}

			} elseif ( false === strpos( $data, '"' ) ) {

				return false;

			}

			// or else fall through

		case 'a' :

		case 'O' :

			return (bool) preg_match( "/^{$token}:[0-9]+:/s", $data );

		case 'b' :

		case 'i' :

		case 'd' :

			$end = $strict ? '$' : '';

			return (bool) preg_match( "/^{$token}:[0-9.E-]+;$end/", $data );

	}

	return false;

}



/**

 * Check whether serialized data is of string type.

 *

 * @since 2.0.5

 *

 * @param string $data Serialized data.

 * @return bool False if not a serialized string, true if it is.

 */

function is_serialized_string( $data ) {

	// if it isn't a string, it isn't a serialized string.

	if ( ! is_string( $data ) ) {

		return false;

	}

	$data = trim( $data );

	if ( strlen( $data ) < 4 ) {

		return false;

	} elseif ( ':' !== $data[1] ) {

		return false;

	} elseif ( ';' !== substr( $data, -1 ) ) {

		return false;

	} elseif ( $data[0] !== 's' ) {

		return false;

	} elseif ( '"' !== substr( $data, -2, 1 ) ) {

		return false;

	} else {

		return true;

	}

}



/**

 * Serialize data, if needed.

 *

 * @since 2.0.5

 *

 * @param string|array|object $data Data that might be serialized.

 * @return mixed A scalar data

 */

function maybe_serialize( $data ) {

	if ( is_array( $data ) || is_object( $data ) )

		return serialize( $data );



	// Double serialization is required for backward compatibility.

	// See http://core.trac.wordpress.org/ticket/12930

	if ( is_serialized( $data, false ) )

		return serialize( $data );



	return $data;

}



/**

 * Retrieve post title from XMLRPC XML.

 *

 * If the title element is not part of the XML, then the default post title from

 * the $post_default_title will be used instead.

 *

 * @since 0.71

 *

 * @global string $post_default_title Default XML-RPC post title.

 *

 * @param string $content XMLRPC XML Request content

 * @return string Post title

 */

function xmlrpc_getposttitle( $content ) {

	global $post_default_title;

	if ( preg_match( '/<title>(.+?)<\/title>/is', $content, $matchtitle ) ) {

		$post_title = $matchtitle[1];

	} else {

		$post_title = $post_default_title;

	}

	return $post_title;

}



/**

 * Retrieve the post category or categories from XMLRPC XML.

 *

 * If the category element is not found, then the default post category will be

 * used. The return type then would be what $post_default_category. If the

 * category is found, then it will always be an array.

 *

 * @since 0.71

 *

 * @global string $post_default_category Default XML-RPC post category.

 *

 * @param string $content XMLRPC XML Request content

 * @return string|array List of categories or category name.

 */

function xmlrpc_getpostcategory( $content ) {

	global $post_default_category;

	if ( preg_match( '/<category>(.+?)<\/category>/is', $content, $matchcat ) ) {

		$post_category = trim( $matchcat[1], ',' );

		$post_category = explode( ',', $post_category );

	} else {

		$post_category = $post_default_category;

	}

	return $post_category;

}



/**

 * XMLRPC XML content without title and category elements.

 *

 * @since 0.71

 *

 * @param string $content XML-RPC XML Request content.

 * @return string XMLRPC XML Request content without title and category elements.

 */

function xmlrpc_removepostdata( $content ) {

	$content = preg_replace( '/<title>(.+?)<\/title>/si', '', $content );

	$content = preg_replace( '/<category>(.+?)<\/category>/si', '', $content );

	$content = trim( $content );

	return $content;

}



/**

 * Use RegEx to extract URLs from arbitrary content.

 *

 * @since 3.7.0

 *

 * @param string $content Content to extract URLs from.

 * @return array URLs found in passed string.

 */

function wp_extract_urls( $content ) {

	preg_match_all(

		"#("

			. "(?:([\w-]+:)?//?)"

			. "[^\s()<>]+"

			. "[.]"

			. "(?:"

				. "\([\w\d]+\)|"

				. "(?:"

					. "[^`!()\[\]{};:'\".,<>?«»“”‘’\s]|"

					. "(?:[:]\d+)?/?"

				. ")+"

			. ")"

		. ")#",

		$content,

		$post_links

	);



	$post_links = array_unique( array_map( 'html_entity_decode', $post_links[0] ) );



	return array_values( $post_links );

}



/**

 * Check content for video and audio links to add as enclosures.

 *

 * Will not add enclosures that have already been added and will

 * remove enclosures that are no longer in the post. This is called as

 * pingbacks and trackbacks.

 *

 * @since 1.5.0

 *

 * @see $wpdb

 *

 * @param string $content Post Content.

 * @param int $post_ID Post ID.

 */

function do_enclose( $content, $post_ID ) {

	global $wpdb;



	//TODO: Tidy this ghetto code up and make the debug code optional

	include_once( ABSPATH . WPINC . '/class-IXR.php' );



	$post_links = array();



	$pung = get_enclosed( $post_ID );



	$post_links_temp = wp_extract_urls( $content );



	foreach ( $pung as $link_test ) {

		if ( ! in_array( $link_test, $post_links_temp ) ) { // link no longer in post

			$mids = $wpdb->get_col( $wpdb->prepare("SELECT meta_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE %s", $post_ID, $wpdb->esc_like( $link_test ) . '%') );

			foreach ( $mids as $mid )

				delete_metadata_by_mid( 'post', $mid );

		}

	}



	foreach ( (array) $post_links_temp as $link_test ) {

		if ( !in_array( $link_test, $pung ) ) { // If we haven't pung it already

			$test = @parse_url( $link_test );

			if ( false === $test )

				continue;

			if ( isset( $test['query'] ) )

				$post_links[] = $link_test;

			elseif ( isset($test['path']) && ( $test['path'] != '/' ) &&  ($test['path'] != '' ) )

				$post_links[] = $link_test;

		}

	}



	foreach ( (array) $post_links as $url ) {

		if ( $url != '' && !$wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE post_id = %d AND meta_key = 'enclosure' AND meta_value LIKE %s", $post_ID, $wpdb->esc_like( $url ) . '%' ) ) ) {



			if ( $headers = wp_get_http_headers( $url) ) {

				$len = isset( $headers['content-length'] ) ? (int) $headers['content-length'] : 0;

				$type = isset( $headers['content-type'] ) ? $headers['content-type'] : '';

				$allowed_types = array( 'video', 'audio' );



				// Check to see if we can figure out the mime type from

				// the extension

				$url_parts = @parse_url( $url );

				if ( false !== $url_parts ) {

					$extension = pathinfo( $url_parts['path'], PATHINFO_EXTENSION );

					if ( !empty( $extension ) ) {

						foreach ( wp_get_mime_types() as $exts => $mime ) {

							if ( preg_match( '!^(' . $exts . ')$!i', $extension ) ) {

								$type = $mime;

								break;

							}

						}

					}

				}



				if ( in_array( substr( $type, 0, strpos( $type, "/" ) ), $allowed_types ) ) {

					add_post_meta( $post_ID, 'enclosure', "$url\n$len\n$mime\n" );

				}

			}

		}

	}

}



/**

 * Perform a HTTP HEAD or GET request.

 *

 * If $file_path is a writable filename, this will do a GET request and write

 * the file to that path.

 *

 * @since 2.5.0

 *

 * @param string      $url       URL to fetch.

 * @param string|bool $file_path Optional. File path to write request to. Default false.

 * @param int         $red       Optional. The number of Redirects followed, Upon 5 being hit,

 *                               returns false. Default 1.

 * @return bool|string False on failure and string of headers if HEAD request.

 */

function wp_get_http( $url, $file_path = false, $red = 1 ) {

	@set_time_limit( 60 );



	if ( $red > 5 )

		return false;



	$options = array();

	$options['redirection'] = 5;



	if ( false == $file_path )

		$options['method'] = 'HEAD';

	else

		$options['method'] = 'GET';



	$response = wp_safe_remote_request( $url, $options );



	if ( is_wp_error( $response ) )

		return false;



	$headers = wp_remote_retrieve_headers( $response );

	$headers['response'] = wp_remote_retrieve_response_code( $response );



	// WP_HTTP no longer follows redirects for HEAD requests.

	if ( 'HEAD' == $options['method'] && in_array($headers['response'], array(301, 302)) && isset( $headers['location'] ) ) {

		return wp_get_http( $headers['location'], $file_path, ++$red );

	}



	if ( false == $file_path )

		return $headers;



	// GET request - write it to the supplied filename

	$out_fp = fopen($file_path, 'w');

	if ( !$out_fp )

		return $headers;



	fwrite( $out_fp,  wp_remote_retrieve_body( $response ) );

	fclose($out_fp);

	clearstatcache();



	return $headers;

}



/**

 * Retrieve HTTP Headers from URL.

 *

 * @since 1.5.1

 *

 * @param string $url        URL to retrieve HTTP headers from.

 * @param bool   $deprecated Not Used.

 * @return bool|string False on failure, headers on success.

 */

function wp_get_http_headers( $url, $deprecated = false ) {

	if ( !empty( $deprecated ) )

		_deprecated_argument( __FUNCTION__, '2.7' );



	$response = wp_safe_remote_head( $url );



	if ( is_wp_error( $response ) )

		return false;



	return wp_remote_retrieve_headers( $response );

}



/**

 * Whether the publish date of the current post in the loop is different from the

 * publish date of the previous post in the loop.

 *

 * @since 0.71

 *

 * @global string $currentday  The day of the current post in the loop.

 * @global string $previousday The day of the previous post in the loop.

 *

 * @return int|bool 1|true when new day, 0|false if not a new day.

 */

function is_new_day() {

	global $currentday, $previousday;

	if ( $currentday != $previousday )

		return 1;

	else

		return 0;

}



/**

 * Build URL query based on an associative and, or indexed array.

 *

 * This is a convenient function for easily building url queries. It sets the

 * separator to '&' and uses _http_build_query() function.

 *

 * @since 2.3.0

 *

 * @see _http_build_query() Used to build the query

 * @see http://us2.php.net/manual/en/function.http-build-query.php for more on what

 *		http_build_query() does.

 *

 * @param array $data URL-encode key/value pairs.

 * @return string URL-encoded string.

 */

function build_query( $data ) {

	return _http_build_query( $data, null, '&', '', false );

}



/**

 * From php.net (modified by Mark Jaquith to behave like the native PHP5 function).

 *

 * @since 3.2.0

 * @access private

 *

 * @see http://us1.php.net/manual/en/function.http-build-query.php

 *

 * @param array|object  $data       An array or object of data. Converted to array.

 * @param string        $prefix     Optional. Numeric index. If set, start parameter numbering with it.

 *                                  Default null.

 * @param string        $sep        Optional. Argument separator; defaults to 'arg_separator.output'.

 *                                  Default null.

 * @param string        $key        Optional. Used to prefix key name. Default empty.

 * @param bool          $urlencode  Optional. Whether to use urlencode() in the result. Default true.

 *

 * @return string The query string.

 */

function _http_build_query( $data, $prefix = null, $sep = null, $key = '', $urlencode = true ) {

	$ret = array();



	foreach ( (array) $data as $k => $v ) {

		if ( $urlencode)

			$k = urlencode($k);

		if ( is_int($k) && $prefix != null )

			$k = $prefix.$k;

		if ( !empty($key) )

			$k = $key . '%5B' . $k . '%5D';

		if ( $v === null )

			continue;

		elseif ( $v === FALSE )

			$v = '0';



		if ( is_array($v) || is_object($v) )

			array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));

		elseif ( $urlencode )

			array_push($ret, $k.'='.urlencode($v));

		else

			array_push($ret, $k.'='.$v);

	}



	if ( null === $sep )

		$sep = ini_get('arg_separator.output');



	return implode($sep, $ret);

}



/**

 * Retrieve a modified URL query string.

 *

 * You can rebuild the URL and append a new query variable to the URL query by

 * using this function. You can also retrieve the full URL with query data.

 *

 * Adding a single key & value or an associative array. Setting a key value to

 * an empty string removes the key. Omitting oldquery_or_uri uses the $_SERVER

 * value. Additional values provided are expected to be encoded appropriately

 * with urlencode() or rawurlencode().

 *

 * @since 1.5.0

 *

 * @param string|array $param1 Either newkey or an associative_array.

 * @param string       $param2 Either newvalue or oldquery or URI.

 * @param string       $param3 Optional. Old query or URI.

 * @return string New URL query string.

 */

function add_query_arg() {

	$args = func_get_args();

	if ( is_array( $args[0] ) ) {

		if ( count( $args ) < 2 || false === $args[1] )

			$uri = $_SERVER['REQUEST_URI'];

		else

			$uri = $args[1];

	} else {

		if ( count( $args ) < 3 || false === $args[2] )

			$uri = $_SERVER['REQUEST_URI'];

		else

			$uri = $args[2];

	}



	if ( $frag = strstr( $uri, '#' ) )

		$uri = substr( $uri, 0, -strlen( $frag ) );

	else

		$frag = '';



	if ( 0 === stripos( $uri, 'http://' ) ) {

		$protocol = 'http://';

		$uri = substr( $uri, 7 );

	} elseif ( 0 === stripos( $uri, 'https://' ) ) {

		$protocol = 'https://';

		$uri = substr( $uri, 8 );

	} else {

		$protocol = '';

	}



	if ( strpos( $uri, '?' ) !== false ) {

		list( $base, $query ) = explode( '?', $uri, 2 );

		$base .= '?';

	} elseif ( $protocol || strpos( $uri, '=' ) === false ) {

		$base = $uri . '?';

		$query = '';

	} else {

		$base = '';

		$query = $uri;

	}



	wp_parse_str( $query, $qs );

	$qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string

	if ( is_array( $args[0] ) ) {

		$kayvees = $args[0];

		$qs = array_merge( $qs, $kayvees );

	} else {

		$qs[ $args[0] ] = $args[1];

	}



	foreach ( $qs as $k => $v ) {

		if ( $v === false )

			unset( $qs[$k] );

	}



	$ret = build_query( $qs );

	$ret = trim( $ret, '?' );

	$ret = preg_replace( '#=(&|$)#', '$1', $ret );

	$ret = $protocol . $base . $ret . $frag;

	$ret = rtrim( $ret, '?' );

	return $ret;

}



/**

 * Removes an item or list from the query string.

 *

 * @since 1.5.0

 *

 * @param string|array $key   Query key or keys to remove.

 * @param bool         $query Optional. When false uses the $_SERVER value. Default false.

 * @return string New URL query string.

 */

function remove_query_arg( $key, $query = false ) {

	if ( is_array( $key ) ) { // removing multiple keys

		foreach ( $key as $k )

			$query = add_query_arg( $k, false, $query );

		return $query;

	}

	return add_query_arg( $key, false, $query );

}



/**

 * Walks the array while sanitizing the contents.

 *

 * @since 0.71

 *

 * @param array $array Array to walk while sanitizing contents.

 * @return array Sanitized $array.

 */

function add_magic_quotes( $array ) {

	foreach ( (array) $array as $k => $v ) {

		if ( is_array( $v ) ) {

			$array[$k] = add_magic_quotes( $v );

		} else {

			$array[$k] = addslashes( $v );

		}

	}

	return $array;

}



/**

 * HTTP request for URI to retrieve content.

 *

 * @since 1.5.1

 *

 * @see wp_safe_remote_get()

 *

 * @param string $uri URI/URL of web page to retrieve.

 * @return bool|string HTTP content. False on failure.

 */

function wp_remote_fopen( $uri ) {

	$parsed_url = @parse_url( $uri );



	if ( !$parsed_url || !is_array( $parsed_url ) )

		return false;



	$options = array();

	$options['timeout'] = 10;



	$response = wp_safe_remote_get( $uri, $options );



	if ( is_wp_error( $response ) )

		return false;



	return wp_remote_retrieve_body( $response );

}



/**

 * Set up the WordPress query.

 *

 * @since 2.0.0

 *

 * @param string $query_vars Default WP_Query arguments.

 */

function wp( $query_vars = '' ) {

	global $wp, $wp_query, $wp_the_query;

	$wp->main( $query_vars );



	if ( !isset($wp_the_query) )

		$wp_the_query = $wp_query;

}



/**

 * Retrieve the description for the HTTP status.

 *

 * @since 2.3.0

 *

 * @param int $code HTTP status code.

 * @return string Empty string if not found, or description if found.

 */

function get_status_header_desc( $code ) {

	global $wp_header_to_desc;



	$code = absint( $code );



	if ( !isset( $wp_header_to_desc ) ) {

		$wp_header_to_desc = array(

			100 => 'Continue',

			101 => 'Switching Protocols',

			102 => 'Processing',



			200 => 'OK',

			201 => 'Created',

			202 => 'Accepted',

			203 => 'Non-Authoritative Information',

			204 => 'No Content',

			205 => 'Reset Content',

			206 => 'Partial Content',

			207 => 'Multi-Status',

			226 => 'IM Used',



			300 => 'Multiple Choices',

			301 => 'Moved Permanently',

			302 => 'Found',

			303 => 'See Other',

			304 => 'Not Modified',

			305 => 'Use Proxy',

			306 => 'Reserved',

			307 => 'Temporary Redirect',



			400 => 'Bad Request',

			401 => 'Unauthorized',

			402 => 'Payment Required',

			403 => 'Forbidden',

			404 => 'Not Found',

			405 => 'Method Not Allowed',

			406 => 'Not Acceptable',

			407 => 'Proxy Authentication Required',

			408 => 'Request Timeout',

			409 => 'Conflict',

			410 => 'Gone',

			411 => 'Length Required',

			412 => 'Precondition Failed',

			413 => 'Request Entity Too Large',

			414 => 'Request-URI Too Long',

			415 => 'Unsupported Media Type',

			416 => 'Requested Range Not Satisfiable',

			417 => 'Expectation Failed',

			418 => 'I\'m a teapot',

			422 => 'Unprocessable Entity',

			423 => 'Locked',

			424 => 'Failed Dependency',

			426 => 'Upgrade Required',

			428 => 'Precondition Required',

			429 => 'Too Many Requests',

			431 => 'Request Header Fields Too Large',



			500 => 'Internal Server Error',

			501 => 'Not Implemented',

			502 => 'Bad Gateway',

			503 => 'Service Unavailable',

			504 => 'Gateway Timeout',

			505 => 'HTTP Version Not Supported',

			506 => 'Variant Also Negotiates',

			507 => 'Insufficient Storage',

			510 => 'Not Extended',

			511 => 'Network Authentication Required',

		);

	}



	if ( isset( $wp_header_to_desc[$code] ) )

		return $wp_header_to_desc[$code];

	else

		return '';

}



/**

 * Set HTTP status header.

 *

 * @since 2.0.0

 *

 * @see get_status_header_desc()

 *

 * @param int $code HTTP status code.

 */

function status_header( $code ) {

	$description = get_status_header_desc( $code );



	if ( empty( $description ) )

		return;



	$protocol = $_SERVER['SERVER_PROTOCOL'];

	if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol )

		$protocol = 'HTTP/1.0';

	$status_header = "$protocol $code $description";

	if ( function_exists( 'apply_filters' ) )



		/**

		 * Filter an HTTP status header.

		 *

		 * @since 2.2.0

		 *

		 * @param string $status_header HTTP status header.

		 * @param int    $code          HTTP status code.

		 * @param string $description   Description for the status code.

		 * @param string $protocol      Server protocol.

		 */

		$status_header = apply_filters( 'status_header', $status_header, $code, $description, $protocol );



	@header( $status_header, true, $code );

}



/**

 * Get the header information to prevent caching.

 *

 * The several different headers cover the different ways cache prevention

 * is handled by different browsers

 *

 * @since 2.8.0

 *

 * @return array The associative array of header names and field values.

 */

function wp_get_nocache_headers() {

	$headers = array(

		'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',

		'Cache-Control' => 'no-cache, must-revalidate, max-age=0',

		'Pragma' => 'no-cache',

	);



	if ( function_exists('apply_filters') ) {

		/**

		 * Filter the cache-controlling headers.

		 *

		 * @since 2.8.0

		 *

		 * @see wp_get_nocache_headers()

		 *

		 * @param array $headers {

		 *     Header names and field values.

		 *

		 *     @type string $Expires       Expires header.

		 *     @type string $Cache-Control Cache-Control header.

		 *     @type string $Pragma        Pragma header.

		 * }

		 */

		$headers = (array) apply_filters( 'nocache_headers', $headers );

	}

	$headers['Last-Modified'] = false;

	return $headers;

}



/**

 * Set the headers to prevent caching for the different browsers.

 *

 * Different browsers support different nocache headers, so several

 * headers must be sent so that all of them get the point that no

 * caching should occur.

 *

 * @since 2.0.0

 *

 * @see wp_get_nocache_headers()

 */

function nocache_headers() {

	$headers = wp_get_nocache_headers();



	unset( $headers['Last-Modified'] );



	// In PHP 5.3+, make sure we are not sending a Last-Modified header.

	if ( function_exists( 'header_remove' ) ) {

		@header_remove( 'Last-Modified' );

	} else {

		// In PHP 5.2, send an empty Last-Modified header, but only as a

		// last resort to override a header already sent. #WP23021

		foreach ( headers_list() as $header ) {

			if ( 0 === stripos( $header, 'Last-Modified' ) ) {

				$headers['Last-Modified'] = '';

				break;

			}

		}

	}



	foreach( $headers as $name => $field_value )

		@header("{$name}: {$field_value}");

}



/**

 * Set the headers for caching for 10 days with JavaScript content type.

 *

 * @since 2.1.0

 */

function cache_javascript_headers() {

	$expiresOffset = 10 * DAY_IN_SECONDS;



	header( "Content-Type: text/javascript; charset=" . get_bloginfo( 'charset' ) );

	header( "Vary: Accept-Encoding" ); // Handle proxies

	header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $expiresOffset ) . " GMT" );

}



/**

 * Retrieve the number of database queries during the WordPress execution.

 *

 * @since 2.0.0

 *

 * @global wpdb $wpdb WordPress database access abstraction object.

 *

 * @return int Number of database queries.

 */

function get_num_queries() {

	global $wpdb;

	return $wpdb->num_queries;

}



/**

 * Whether input is yes or no.

 *

 * Must be 'y' to be true.

 *

 * @since 1.0.0

 *

 * @param string $yn Character string containing either 'y' (yes) or 'n' (no).

 * @return bool True if yes, false on anything else.

 */

function bool_from_yn( $yn ) {

	return ( strtolower( $yn ) == 'y' );

}



/**

 * Load the feed template from the use of an action hook.

 *

 * If the feed action does not have a hook, then the function will die with a

 * message telling the visitor that the feed is not valid.

 *

 * It is better to only have one hook for each feed.

 *

 * @since 2.1.0

 *

 * @uses $wp_query Used to tell if the use a comment feed.

 */

function do_feed() {

	global $wp_query;



	$feed = get_query_var( 'feed' );



	// Remove the pad, if present.

	$feed = preg_replace( '/^_+/', '', $feed );



	if ( $feed == '' || $feed == 'feed' )

		$feed = get_default_feed();



	$hook = 'do_feed_' . $feed;

	if ( ! has_action( $hook ) )

		wp_die( __( 'ERROR: This is not a valid feed template.' ), '', array( 'response' => 404 ) );



	/**

	 * Fires once the given feed is loaded.

	 *

	 * The dynamic hook name, $hook, refers to the feed name.

	 *

	 * @since 2.1.0

	 *

	 * @param bool $is_comment_feed Whether the feed is a comment feed.

	 */

	do_action( $hook, $wp_query->is_comment_feed );

}



/**

 * Load the RDF RSS 0.91 Feed template.

 *

 * @since 2.1.0

 *

 * @see load_template()

 */

function do_feed_rdf() {

	load_template( ABSPATH . WPINC . '/feed-rdf.php' );

}



/**

 * Load the RSS 1.0 Feed Template.

 *

 * @since 2.1.0

 *

 * @see load_template()

 */

function do_feed_rss() {

	load_template( ABSPATH . WPINC . '/feed-rss.php' );

}



/**

 * Load either the RSS2 comment feed or the RSS2 posts feed.

 *

 * @since 2.1.0

 *

 * @see load_template()

 *

 * @param bool $for_comments True for the comment feed, false for normal feed.

 */

function do_feed_rss2( $for_comments ) {

	if ( $for_comments )

		load_template( ABSPATH . WPINC . '/feed-rss2-comments.php' );

	else

		load_template( ABSPATH . WPINC . '/feed-rss2.php' );

}



/**

 * Load either Atom comment feed or Atom posts feed.

 *

 * @since 2.1.0

 *

 * @see load_template()

 *

 * @param bool $for_comments True for the comment feed, false for normal feed.

 */

function do_feed_atom( $for_comments ) {

	if ($for_comments)

		load_template( ABSPATH . WPINC . '/feed-atom-comments.php');

	else

		load_template( ABSPATH . WPINC . '/feed-atom.php' );

}



/**

 * Display the robots.txt file content.

 *

 * The echo content should be with usage of the permalinks or for creating the

 * robots.txt file.

 *

 * @since 2.1.0

 */

function do_robots() {

	header( 'Content-Type: text/plain; charset=utf-8' );



	/**

	 * Fires when displaying the robots.txt file.

	 *

	 * @since 2.1.0

	 */

	do_action( 'do_robotstxt' );



	$output = "User-agent: *\n";

	$public = get_option( 'blog_public' );

	if ( '0' == $public ) {

		$output .= "Disallow: /\n";

	} else {

		$site_url = parse_url( site_url() );

		$path = ( !empty( $site_url['path'] ) ) ? $site_url['path'] : '';

		$output .= "Disallow: $path/wp-admin/\n";

	}



	/**

	 * Filter the robots.txt output.

	 *

	 * @since 3.0.0

	 *

	 * @param string $output Robots.txt output.

	 * @param bool   $public Whether the site is considered "public".

	 */

	echo apply_filters( 'robots_txt', $output, $public );

}



/**

 * Test whether blog is already installed.

 *

 * The cache will be checked first. If you have a cache plugin, which saves

 * the cache values, then this will work. If you use the default WordPress

 * cache, and the database goes away, then you might have problems.

 *

 * Checks for the 'siteurl' option for whether WordPress is installed.

 *

 * @since 2.1.0

 *

 * @global wpdb $wpdb WordPress database access abstraction object.

 *

 * @return bool Whether the blog is already installed.

 */

function is_blog_installed() {

	global $wpdb;



	/*

	 * Check cache first. If options table goes away and we have true

	 * cached, oh well.

	 */

	if ( wp_cache_get( 'is_blog_installed' ) )

		return true;



	$suppress = $wpdb->suppress_errors();

	if ( ! defined( 'WP_INSTALLING' ) ) {

		$alloptions = wp_load_alloptions();

	}

	// If siteurl is not set to autoload, check it specifically

	if ( !isset( $alloptions['siteurl'] ) )

		$installed = $wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = 'siteurl'" );

	else

		$installed = $alloptions['siteurl'];

	$wpdb->suppress_errors( $suppress );



	$installed = !empty( $installed );

	wp_cache_set( 'is_blog_installed', $installed );



	if ( $installed )

		return true;



	// If visiting repair.php, return true and let it take over.

	if ( defined( 'WP_REPAIRING' ) )

		return true;



	$suppress = $wpdb->suppress_errors();



	/*

	 * Loop over the WP tables. If none exist, then scratch install is allowed.

	 * If one or more exist, suggest table repair since we got here because the

	 * options table could not be accessed.

	 */

	$wp_tables = $wpdb->tables();

	foreach ( $wp_tables as $table ) {

		// The existence of custom user tables shouldn't suggest an insane state or prevent a clean install.

		if ( defined( 'CUSTOM_USER_TABLE' ) && CUSTOM_USER_TABLE == $table )

			continue;

		if ( defined( 'CUSTOM_USER_META_TABLE' ) && CUSTOM_USER_META_TABLE == $table )

			continue;



		if ( ! $wpdb->get_results( "DESCRIBE $table;" ) )

			continue;



		// One or more tables exist. We are insane.



		wp_load_translations_early();



		// Die with a DB error.

		$wpdb->error = sprintf( __( 'One or more database tables are unavailable. The database may need to be <a href="%s">repaired</a>.' ), 'maint/repair.php?referrer=is_blog_installed' );

		dead_db();

	}



	$wpdb->suppress_errors( $suppress );



	wp_cache_set( 'is_blog_installed', false );



	return false;

}



/**

 * Retrieve URL with nonce added to URL query.

 *

 * @since 2.0.4

 *

 * @param string $actionurl URL to add nonce action.

 * @param string $action    Optional. Nonce action name. Default -1.

 * @param string $name      Optional. Nonce name. Default '_wpnonce'.

 * @return string Escaped URL with nonce action added.

 */

function wp_nonce_url( $actionurl, $action = -1, $name = '_wpnonce' ) {

	$actionurl = str_replace( '&amp;', '&', $actionurl );

	return esc_html( add_query_arg( $name, wp_create_nonce( $action ), $actionurl ) );

}



/**

 * Retrieve or display nonce hidden field for forms.

 *

 * The nonce field is used to validate that the contents of the form came from

 * the location on the current site and not somewhere else. The nonce does not

 * offer absolute protection, but should protect against most cases. It is very

 * important to use nonce field in forms.

 *

 * The $action and $name are optional, but if you want to have better security,

 * it is strongly suggested to set those two parameters. It is easier to just

 * call the function without any parameters, because validation of the nonce

 * doesn't require any parameters, but since crackers know what the default is

 * it won't be difficult for them to find a way around your nonce and cause

 * damage.

 *

 * The input name will be whatever $name value you gave. The input value will be

 * the nonce creation value.

 *

 * @since 2.0.4

 *

 * @param string $action  Optional. Action name. Default -1.

 * @param string $name    Optional. Nonce name. Default '_wpnonce'.

 * @param bool   $referer Optional. Whether to set the referer field for validation. Default true.

 * @param bool   $echo    Optional. Whether to display or return hidden form field. Default true.

 * @return string Nonce field HTML markup.

 */

function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {

	$name = esc_attr( $name );

	$nonce_field = '<input type="hidden" id="' . $name . '" name="' . $name . '" value="' . wp_create_nonce( $action ) . '" />';



	if ( $referer )

		$nonce_field .= wp_referer_field( false );



	if ( $echo )

		echo $nonce_field;



	return $nonce_field;

}



/**

 * Retrieve or display referer hidden field for forms.

 *

 * The referer link is the current Request URI from the server super global. The

 * input name is '_wp_http_referer', in case you wanted to check manually.

 *

 * @since 2.0.4

 *

 * @param bool $echo Optional. Whether to echo or return the referer field. Default true.

 * @return string Referer field HTML markup.

 */

function wp_referer_field( $echo = true ) {

	$referer_field = '<input type="hidden" name="_wp_http_referer" value="'. esc_attr( wp_unslash( $_SERVER['REQUEST_URI'] ) ) . '" />';



	if ( $echo )

		echo $referer_field;

	return $referer_field;

}



/**

 * Retrieve or display original referer hidden field for forms.

 *

 * The input name is '_wp_original_http_referer' and will be either the same

 * value of wp_referer_field(), if that was posted already or it will be the

 * current page, if it doesn't exist.

 *

 * @since 2.0.4

 *

 * @param bool   $echo         Optional. Whether to echo the original http referer. Default true.

 * @param string $jump_back_to Optional. Can be 'previous' or page you want to jump back to.

 *                             Default 'current'.

 * @return string Original referer field.

 */

function wp_original_referer_field( $echo = true, $jump_back_to = 'current' ) {

	if ( ! $ref = wp_get_original_referer() ) {

		$ref = 'previous' == $jump_back_to ? wp_get_referer() : wp_unslash( $_SERVER['REQUEST_URI'] );

	}

	$orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr( $ref ) . '" />';

	if ( $echo )

		echo $orig_referer_field;

	return $orig_referer_field;

}



/**

 * Retrieve referer from '_wp_http_referer' or HTTP referer.

 *

 * If it's the same as the current request URL, will return false.

 *

 * @since 2.0.4

 *

 * @return string|bool False on failure. Referer URL on success.

 */

function wp_get_referer() {

	if ( ! function_exists( 'wp_validate_redirect' ) )

		return false;

	$ref = false;

	if ( ! empty( $_REQUEST['_wp_http_referer'] ) )

		$ref = wp_unslash( $_REQUEST['_wp_http_referer'] );

	else if ( ! empty( $_SERVER['HTTP_REFERER'] ) )

		$ref = wp_unslash( $_SERVER['HTTP_REFERER'] );



	if ( $ref && $ref !== wp_unslash( $_SERVER['REQUEST_URI'] ) )

		return wp_validate_redirect( $ref, false );

	return false;

}



/**

 * Retrieve original referer that was posted, if it exists.

 *

 * @since 2.0.4

 *

 * @return string|bool False if no original referer or original referer if set.

 */

function wp_get_original_referer() {

	if ( ! empty( $_REQUEST['_wp_original_http_referer'] ) && function_exists( 'wp_validate_redirect' ) )

		return wp_validate_redirect( wp_unslash( $_REQUEST['_wp_original_http_referer'] ), false );

	return false;

}



/**

 * Recursive directory creation based on full path.

 *

 * Will attempt to set permissions on folders.

 *

 * @since 2.0.1

 *

 * @param string $target Full path to attempt to create.

 * @return bool Whether the path was created. True if path already exists.

 */

function wp_mkdir_p( $target ) {

	$wrapper = null;



	// Strip the protocol.

	if( wp_is_stream( $target ) ) {

		list( $wrapper, $target ) = explode( '://', $target, 2 );

	}



	// From php.net/mkdir user contributed notes.

	$target = str_replace( '//', '/', $target );



	// Put the wrapper back on the target.

	if( $wrapper !== null ) {

		$target = $wrapper . '://' . $target;

	}



	/*

	 * Safe mode fails with a trailing slash under certain PHP versions.

	 * Use rtrim() instead of untrailingslashit to avoid formatting.php dependency.

	 */

	$target = rtrim($target, '/');

	if ( empty($target) )

		$target = '/';



	if ( file_exists( $target ) )

		return @is_dir( $target );



	// We need to find the permissions of the parent folder that exists and inherit that.

	$target_parent = dirname( $target );

	while ( '.' != $target_parent && ! is_dir( $target_parent ) ) {

		$target_parent = dirname( $target_parent );

	}



	// Get the permission bits.

	if ( $stat = @stat( $target_parent ) ) {

		$dir_perms = $stat['mode'] & 0007777;

	} else {

		$dir_perms = 0777;

	}



	if ( @mkdir( $target, $dir_perms, true ) ) {



		/*

		 * If a umask is set that modifies $dir_perms, we'll have to re-set

		 * the $dir_perms correctly with chmod()

		 */

		if ( $dir_perms != ( $dir_perms & ~umask() ) ) {

			$folder_parts = explode( '/', substr( $target, strlen( $target_parent ) + 1 ) );

			for ( $i = 1; $i <= count( $folder_parts ); $i++ ) {

				@chmod( $target_parent . '/' . implode( '/', array_slice( $folder_parts, 0, $i ) ), $dir_perms );

			}

		}



		return true;

	}



	return false;

}



/**

 * Test if a give filesystem path is absolute.

 *

 * For example, '/foo/bar', or 'c:\windows'.

 *

 * @since 2.5.0

 *

 * @param string $path File path.

 * @return bool True if path is absolute, false is not absolute.

 */

function path_is_absolute( $path ) {

	/*

	 * This is definitive if true but fails if $path does not exist or contains

	 * a symbolic link.

	 */

	if ( realpath($path) == $path )

		return true;



	if ( strlen($path) == 0 || $path[0] == '.' )

		return false;



	// Windows allows absolute paths like this.

	if ( preg_match('#^[a-zA-Z]:\\\\#', $path) )

		return true;



	// A path starting with / or \ is absolute; anything else is relative.

	return ( $path[0] == '/' || $path[0] == '\\' );

}



/**

 * Join two filesystem paths together.

 *

 * For example, 'give me $path relative to $base'. If the $path is absolute,

 * then it the full path is returned.

 *

 * @since 2.5.0

 *

 * @param string $base Base path.

 * @param string $path Path relative to $base.

 * @return string The path with the base or absolute path.

 */

function path_join( $base, $path ) {

	if ( path_is_absolute($path) )

		return $path;



	return rtrim($base, '/') . '/' . ltrim($path, '/');

}



/**

 * Normalize a filesystem path.

 *

 * Replaces backslashes with forward slashes for Windows systems, and ensures

 * no duplicate slashes exist.

 *

 * @since 3.9.0

 *

 * @param string $path Path to normalize.

 * @return string Normalized path.

 */

function wp_normalize_path( $path ) {

	$path = str_replace( '\\', '/', $path );

	$path = preg_replace( '|/+|','/', $path );

	return $path;

}



/**

 * Determine a writable directory for temporary files.

 *

 * Function's preference is the return value of sys_get_temp_dir(),

 * followed by your PHP temporary upload directory, followed by WP_CONTENT_DIR,

 * before finally defaulting to /tmp/

 *

 * In the event that this function does not find a writable location,

 * It may be overridden by the WP_TEMP_DIR constant in your wp-config.php file.

 *

 * @since 2.5.0

 *

 * @return string Writable temporary directory.

 */

function get_temp_dir() {

	static $temp;

	if ( defined('WP_TEMP_DIR') )

		return trailingslashit(WP_TEMP_DIR);



	if ( $temp )

		return trailingslashit( $temp );



	if ( function_exists('sys_get_temp_dir') ) {

		$temp = sys_get_temp_dir();

		if ( @is_dir( $temp ) && wp_is_writable( $temp ) )

			return trailingslashit( $temp );

	}



	$temp = ini_get('upload_tmp_dir');

	if ( @is_dir( $temp ) && wp_is_writable( $temp ) )

		return trailingslashit( $temp );



	$temp = WP_CONTENT_DIR . '/';

	if ( is_dir( $temp ) && wp_is_writable( $temp ) )

		return $temp;



	$temp = '/tmp/';

	return $temp;

}



/**

 * Determine if a directory is writable.

 *

 * This function is used to work around certain ACL issues in PHP primarily

 * affecting Windows Servers.

 *

 * @since 3.6.0

 *

 * @see win_is_writable()

 *

 * @param string $path Path to check for write-ability.

 * @return bool Whether the path is writable.

 */

function wp_is_writable( $path ) {

	if ( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) )

		return win_is_writable( $path );

	else

		return @is_writable( $path );

}



/**

 * Workaround for Windows bug in is_writable() function

 *

 * PHP has issues with Windows ACL's for determine if a

 * directory is writable or not, this works around them by

 * checking the ability to open files rather than relying

 * upon PHP to interprate the OS ACL.

 *

 * @since 2.8.0

 *

 * @see http://bugs.php.net/bug.php?id=27609

 * @see http://bugs.php.net/bug.php?id=30931

 *

 * @param string $path Windows path to check for write-ability.

 * @return bool Whether the path is writable.

 */

function win_is_writable( $path ) {



	if ( $path[strlen( $path ) - 1] == '/' ) // if it looks like a directory, check a random file within the directory

		return win_is_writable( $path . uniqid( mt_rand() ) . '.tmp');

	else if ( is_dir( $path ) ) // If it's a directory (and not a file) check a random file within the directory

		return win_is_writable( $path . '/' . uniqid( mt_rand() ) . '.tmp' );



	// check tmp file for read/write capabilities

	$should_delete_tmp_file = !file…