/wp-includes/link-template.php
PHP | 3137 lines | 2105 code | 208 blank | 824 comment | 192 complexity | a84c1522a7ee47fee6ebbba72cd25eb9 MD5 | raw file
Possible License(s): GPL-2.0, AGPL-1.0, LGPL-2.1
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- <?php
- /**
- * WordPress Link Template Functions
- *
- * @package WordPress
- * @subpackage Template
- */
- /**
- * Display the permalink for the current post.
- *
- * @since 1.2.0
- */
- function the_permalink() {
- /**
- * Filter the display of the permalink for the current post.
- *
- * @since 1.5.0
- *
- * @param string $permalink The permalink for the current post.
- */
- echo esc_url( apply_filters( 'the_permalink', get_permalink() ) );
- }
- /**
- * Retrieve trailing slash string, if blog set for adding trailing slashes.
- *
- * Conditionally adds a trailing slash if the permalink structure has a trailing
- * slash, strips the trailing slash if not. The string is passed through the
- * 'user_trailingslashit' filter. Will remove trailing slash from string, if
- * blog is not set to have them.
- *
- * @since 2.2.0
- * @uses $wp_rewrite
- *
- * @param string $string URL with or without a trailing slash.
- * @param string $type_of_url The type of URL being considered (e.g. single, category, etc) for use in the filter.
- * @return string
- */
- function user_trailingslashit($string, $type_of_url = '') {
- global $wp_rewrite;
- if ( $wp_rewrite->use_trailing_slashes )
- $string = trailingslashit($string);
- else
- $string = untrailingslashit($string);
- /**
- * Filter the trailing slashed string, depending on whether the site is set
- * to use training slashes.
- *
- * @since 2.2.0
- *
- * @param string $string URL with or without a trailing slash.
- * @param string $type_of_url The type of URL being considered. Accepts 'single', 'single_trackback',
- * 'single_feed', 'single_paged', 'feed', 'category', 'page', 'year',
- * 'month', 'day', 'paged', 'post_type_archive'.
- */
- $string = apply_filters( 'user_trailingslashit', $string, $type_of_url );
- return $string;
- }
- /**
- * Display permalink anchor for current post.
- *
- * The permalink mode title will use the post title for the 'a' element 'id'
- * attribute. The id mode uses 'post-' with the post ID for the 'id' attribute.
- *
- * @since 0.71
- *
- * @param string $mode Permalink mode can be either 'title', 'id', or default, which is 'id'.
- */
- function permalink_anchor( $mode = 'id' ) {
- $post = get_post();
- switch ( strtolower( $mode ) ) {
- case 'title':
- $title = sanitize_title( $post->post_title ) . '-' . $post->ID;
- echo '<a id="'.$title.'"></a>';
- break;
- case 'id':
- default:
- echo '<a id="post-' . $post->ID . '"></a>';
- break;
- }
- }
- /**
- * Retrieve full permalink for current post or post ID.
- *
- * This function is an alias for get_permalink().
- *
- * @since 3.9.0
- *
- * @see get_permalink()
- *
- * @param int|WP_Post $id Optional. Post ID or post object. Default is the current post.
- * @param bool $leavename Optional. Whether to keep post name or page name. Default false.
- * @return string|bool The permalink URL or false if post does not exist.
- */
- function get_the_permalink( $id = 0, $leavename = false ) {
- return get_permalink( $id, $leavename );
- }
- /**
- * Retrieve full permalink for current post or post ID.
- *
- * @since 1.0.0
- *
- * @param int|WP_Post $id Optional. Post ID or post object. Default current post.
- * @param bool $leavename Optional. Whether to keep post name or page name. Default false.
- * @return string|bool The permalink URL or false if post does not exist.
- */
- function get_permalink( $id = 0, $leavename = false ) {
- $rewritecode = array(
- '%year%',
- '%monthnum%',
- '%day%',
- '%hour%',
- '%minute%',
- '%second%',
- $leavename? '' : '%postname%',
- '%post_id%',
- '%category%',
- '%author%',
- $leavename? '' : '%pagename%',
- );
- if ( is_object($id) && isset($id->filter) && 'sample' == $id->filter ) {
- $post = $id;
- $sample = true;
- } else {
- $post = get_post($id);
- $sample = false;
- }
- if ( empty($post->ID) )
- return false;
- if ( $post->post_type == 'page' )
- return get_page_link($post->ID, $leavename, $sample);
- elseif ( $post->post_type == 'attachment' )
- return get_attachment_link( $post->ID, $leavename );
- elseif ( in_array($post->post_type, get_post_types( array('_builtin' => false) ) ) )
- return get_post_permalink($post->ID, $leavename, $sample);
- $permalink = get_option('permalink_structure');
- /**
- * Filter the permalink structure for a post before token replacement occurs.
- *
- * Only applies to posts with post_type of 'post'.
- *
- * @since 3.0.0
- *
- * @param string $permalink The site's permalink structure.
- * @param WP_Post $post The post in question.
- * @param bool $leavename Whether to keep the post name.
- */
- $permalink = apply_filters( 'pre_post_link', $permalink, $post, $leavename );
- if ( '' != $permalink && !in_array($post->post_status, array('draft', 'pending', 'auto-draft')) ) {
- $unixtime = strtotime($post->post_date);
- $category = '';
- if ( strpos($permalink, '%category%') !== false ) {
- $cats = get_the_category($post->ID);
- if ( $cats ) {
- usort($cats, '_usort_terms_by_ID'); // order by ID
- /**
- * Filter the category that gets used in the %category% permalink token.
- *
- * @since 3.5.0
- *
- * @param stdClass $cat The category to use in the permalink.
- * @param array $cats Array of all categories associated with the post.
- * @param WP_Post $post The post in question.
- */
- $category_object = apply_filters( 'post_link_category', $cats[0], $cats, $post );
- $category_object = get_term( $category_object, 'category' );
- $category = $category_object->slug;
- if ( $parent = $category_object->parent )
- $category = get_category_parents($parent, false, '/', true) . $category;
- }
- // show default category in permalinks, without
- // having to assign it explicitly
- if ( empty($category) ) {
- $default_category = get_term( get_option( 'default_category' ), 'category' );
- $category = is_wp_error( $default_category ) ? '' : $default_category->slug;
- }
- }
- $author = '';
- if ( strpos($permalink, '%author%') !== false ) {
- $authordata = get_userdata($post->post_author);
- $author = $authordata->user_nicename;
- }
- $date = explode(" ",date('Y m d H i s', $unixtime));
- $rewritereplace =
- array(
- $date[0],
- $date[1],
- $date[2],
- $date[3],
- $date[4],
- $date[5],
- $post->post_name,
- $post->ID,
- $category,
- $author,
- $post->post_name,
- );
- $permalink = home_url( str_replace($rewritecode, $rewritereplace, $permalink) );
- $permalink = user_trailingslashit($permalink, 'single');
- } else { // if they're not using the fancy permalink option
- $permalink = home_url('?p=' . $post->ID);
- }
- /**
- * Filter the permalink for a post.
- *
- * Only applies to posts with post_type of 'post'.
- *
- * @since 1.5.0
- *
- * @param string $permalink The post's permalink.
- * @param WP_Post $post The post in question.
- * @param bool $leavename Whether to keep the post name.
- */
- return apply_filters( 'post_link', $permalink, $post, $leavename );
- }
- /**
- * Retrieve the permalink for a post with a custom post type.
- *
- * @since 3.0.0
- *
- * @param int $id Optional. Post ID.
- * @param bool $leavename Optional, defaults to false. Whether to keep post name.
- * @param bool $sample Optional, defaults to false. Is it a sample permalink.
- * @return string
- */
- function get_post_permalink( $id = 0, $leavename = false, $sample = false ) {
- global $wp_rewrite;
- $post = get_post($id);
- if ( is_wp_error( $post ) )
- return $post;
- $post_link = $wp_rewrite->get_extra_permastruct($post->post_type);
- $slug = $post->post_name;
- $draft_or_pending = isset($post->post_status) && in_array( $post->post_status, array( 'draft', 'pending', 'auto-draft' ) );
- $post_type = get_post_type_object($post->post_type);
- if ( !empty($post_link) && ( !$draft_or_pending || $sample ) ) {
- if ( ! $leavename ) {
- if ( $post_type->hierarchical )
- $slug = get_page_uri($id);
- $post_link = str_replace("%$post->post_type%", $slug, $post_link);
- }
- $post_link = home_url( user_trailingslashit($post_link) );
- } else {
- if ( $post_type->query_var && ( isset($post->post_status) && !$draft_or_pending ) )
- $post_link = add_query_arg($post_type->query_var, $slug, '');
- else
- $post_link = add_query_arg(array('post_type' => $post->post_type, 'p' => $post->ID), '');
- $post_link = home_url($post_link);
- }
- /**
- * Filter the permalink for a post with a custom post type.
- *
- * @since 3.0.0
- *
- * @param string $post_link The post's permalink.
- * @param WP_Post $post The post in question.
- * @param bool $leavename Whether to keep the post name.
- * @param bool $sample Is it a sample permalink.
- */
- return apply_filters( 'post_type_link', $post_link, $post, $leavename, $sample );
- }
- /**
- * Retrieve permalink from post ID.
- *
- * @since 1.0.0
- *
- * @param int|WP_Post $post_id Optional. Post ID or WP_Post object. Default is global `$post`.
- * @param mixed $deprecated Not used.
- * @return string
- */
- function post_permalink( $post_id = 0, $deprecated = '' ) {
- if ( !empty( $deprecated ) )
- _deprecated_argument( __FUNCTION__, '1.3' );
- return get_permalink($post_id);
- }
- /**
- * Retrieve the permalink for current page or page ID.
- *
- * Respects page_on_front. Use this one.
- *
- * @since 1.5.0
- *
- * @param int|object $post Optional. Post ID or object.
- * @param bool $leavename Optional, defaults to false. Whether to keep page name.
- * @param bool $sample Optional, defaults to false. Is it a sample permalink.
- * @return string
- */
- function get_page_link( $post = false, $leavename = false, $sample = false ) {
- $post = get_post( $post );
- if ( 'page' == get_option( 'show_on_front' ) && $post->ID == get_option( 'page_on_front' ) )
- $link = home_url('/');
- else
- $link = _get_page_link( $post, $leavename, $sample );
- /**
- * Filter the permalink for a page.
- *
- * @since 1.5.0
- *
- * @param string $link The page's permalink.
- * @param int $post_id The ID of the page.
- * @param bool $sample Is it a sample permalink.
- */
- return apply_filters( 'page_link', $link, $post->ID, $sample );
- }
- /**
- * Retrieve the page permalink.
- *
- * Ignores page_on_front. Internal use only.
- *
- * @since 2.1.0
- * @access private
- *
- * @param int|object $post Optional. Post ID or object.
- * @param bool $leavename Optional. Leave name.
- * @param bool $sample Optional. Sample permalink.
- * @return string
- */
- function _get_page_link( $post = false, $leavename = false, $sample = false ) {
- global $wp_rewrite;
- $post = get_post( $post );
- $draft_or_pending = in_array( $post->post_status, array( 'draft', 'pending', 'auto-draft' ) );
- $link = $wp_rewrite->get_page_permastruct();
- if ( !empty($link) && ( ( isset($post->post_status) && !$draft_or_pending ) || $sample ) ) {
- if ( ! $leavename ) {
- $link = str_replace('%pagename%', get_page_uri( $post ), $link);
- }
- $link = home_url($link);
- $link = user_trailingslashit($link, 'page');
- } else {
- $link = home_url( '?page_id=' . $post->ID );
- }
- /**
- * Filter the permalink for a non-page_on_front page.
- *
- * @since 2.1.0
- *
- * @param string $link The page's permalink.
- * @param int $post_id The ID of the page.
- */
- return apply_filters( '_get_page_link', $link, $post->ID );
- }
- /**
- * Retrieve permalink for attachment.
- *
- * This can be used in the WordPress Loop or outside of it.
- *
- * @since 2.0.0
- *
- * @param int|object $post Optional. Post ID or object.
- * @param bool $leavename Optional. Leave name.
- * @return string
- */
- function get_attachment_link( $post = null, $leavename = false ) {
- global $wp_rewrite;
- $link = false;
- $post = get_post( $post );
- $parent = ( $post->post_parent > 0 && $post->post_parent != $post->ID ) ? get_post( $post->post_parent ) : false;
- if ( $wp_rewrite->using_permalinks() && $parent ) {
- if ( 'page' == $parent->post_type )
- $parentlink = _get_page_link( $post->post_parent ); // Ignores page_on_front
- else
- $parentlink = get_permalink( $post->post_parent );
- if ( is_numeric($post->post_name) || false !== strpos(get_option('permalink_structure'), '%category%') )
- $name = 'attachment/' . $post->post_name; // <permalink>/<int>/ is paged so we use the explicit attachment marker
- else
- $name = $post->post_name;
- if ( strpos($parentlink, '?') === false )
- $link = user_trailingslashit( trailingslashit($parentlink) . '%postname%' );
- if ( ! $leavename )
- $link = str_replace( '%postname%', $name, $link );
- }
- if ( ! $link )
- $link = home_url( '/?attachment_id=' . $post->ID );
- /**
- * Filter the permalink for an attachment.
- *
- * @since 2.0.0
- *
- * @param string $link The attachment's permalink.
- * @param int $post_id Attachment ID.
- */
- return apply_filters( 'attachment_link', $link, $post->ID );
- }
- /**
- * Retrieve the permalink for the year archives.
- *
- * @since 1.5.0
- *
- * @param int|bool $year False for current year or year for permalink.
- * @return string
- */
- function get_year_link($year) {
- global $wp_rewrite;
- if ( !$year )
- $year = gmdate('Y', current_time('timestamp'));
- $yearlink = $wp_rewrite->get_year_permastruct();
- if ( !empty($yearlink) ) {
- $yearlink = str_replace('%year%', $year, $yearlink);
- $yearlink = home_url( user_trailingslashit( $yearlink, 'year' ) );
- } else {
- $yearlink = home_url( '?m=' . $year );
- }
- /**
- * Filter the year archive permalink.
- *
- * @since 1.5.0
- *
- * @param string $yearlink Permalink for the year archive.
- * @param int $year Year for the archive.
- */
- return apply_filters( 'year_link', $yearlink, $year );
- }
- /**
- * Retrieve the permalink for the month archives with year.
- *
- * @since 1.0.0
- *
- * @param bool|int $year False for current year. Integer of year.
- * @param bool|int $month False for current month. Integer of month.
- * @return string
- */
- function get_month_link($year, $month) {
- global $wp_rewrite;
- if ( !$year )
- $year = gmdate('Y', current_time('timestamp'));
- if ( !$month )
- $month = gmdate('m', current_time('timestamp'));
- $monthlink = $wp_rewrite->get_month_permastruct();
- if ( !empty($monthlink) ) {
- $monthlink = str_replace('%year%', $year, $monthlink);
- $monthlink = str_replace('%monthnum%', zeroise(intval($month), 2), $monthlink);
- $monthlink = home_url( user_trailingslashit( $monthlink, 'month' ) );
- } else {
- $monthlink = home_url( '?m=' . $year . zeroise( $month, 2 ) );
- }
- /**
- * Filter the month archive permalink.
- *
- * @since 1.5.0
- *
- * @param string $monthlink Permalink for the month archive.
- * @param int $year Year for the archive.
- * @param int $month The month for the archive.
- */
- return apply_filters( 'month_link', $monthlink, $year, $month );
- }
- /**
- * Retrieve the permalink for the day archives with year and month.
- *
- * @since 1.0.0
- *
- * @param bool|int $year False for current year. Integer of year.
- * @param bool|int $month False for current month. Integer of month.
- * @param bool|int $day False for current day. Integer of day.
- * @return string
- */
- function get_day_link($year, $month, $day) {
- global $wp_rewrite;
- if ( !$year )
- $year = gmdate('Y', current_time('timestamp'));
- if ( !$month )
- $month = gmdate('m', current_time('timestamp'));
- if ( !$day )
- $day = gmdate('j', current_time('timestamp'));
- $daylink = $wp_rewrite->get_day_permastruct();
- if ( !empty($daylink) ) {
- $daylink = str_replace('%year%', $year, $daylink);
- $daylink = str_replace('%monthnum%', zeroise(intval($month), 2), $daylink);
- $daylink = str_replace('%day%', zeroise(intval($day), 2), $daylink);
- $daylink = home_url( user_trailingslashit( $daylink, 'day' ) );
- } else {
- $daylink = home_url( '?m=' . $year . zeroise( $month, 2 ) . zeroise( $day, 2 ) );
- }
- /**
- * Filter the day archive permalink.
- *
- * @since 1.5.0
- *
- * @param string $daylink Permalink for the day archive.
- * @param int $year Year for the archive.
- * @param int $month Month for the archive.
- * @param int $day The day for the archive.
- */
- return apply_filters( 'day_link', $daylink, $year, $month, $day );
- }
- /**
- * Display the permalink for the feed type.
- *
- * @since 3.0.0
- *
- * @param string $anchor The link's anchor text.
- * @param string $feed Optional, defaults to default feed. Feed type.
- */
- function the_feed_link( $anchor, $feed = '' ) {
- $link = '<a href="' . esc_url( get_feed_link( $feed ) ) . '">' . $anchor . '</a>';
- /**
- * Filter the feed link anchor tag.
- *
- * @since 3.0.0
- *
- * @param string $link The complete anchor tag for a feed link.
- * @param string $feed The feed type, or an empty string for the
- * default feed type.
- */
- echo apply_filters( 'the_feed_link', $link, $feed );
- }
- /**
- * Retrieve the permalink for the feed type.
- *
- * @since 1.5.0
- *
- * @param string $feed Optional, defaults to default feed. Feed type.
- * @return string
- */
- function get_feed_link($feed = '') {
- global $wp_rewrite;
- $permalink = $wp_rewrite->get_feed_permastruct();
- if ( '' != $permalink ) {
- if ( false !== strpos($feed, 'comments_') ) {
- $feed = str_replace('comments_', '', $feed);
- $permalink = $wp_rewrite->get_comment_feed_permastruct();
- }
- if ( get_default_feed() == $feed )
- $feed = '';
- $permalink = str_replace('%feed%', $feed, $permalink);
- $permalink = preg_replace('#/+#', '/', "/$permalink");
- $output = home_url( user_trailingslashit($permalink, 'feed') );
- } else {
- if ( empty($feed) )
- $feed = get_default_feed();
- if ( false !== strpos($feed, 'comments_') )
- $feed = str_replace('comments_', 'comments-', $feed);
- $output = home_url("?feed={$feed}");
- }
- /**
- * Filter the feed type permalink.
- *
- * @since 1.5.0
- *
- * @param string $output The feed permalink.
- * @param string $feed Feed type.
- */
- return apply_filters( 'feed_link', $output, $feed );
- }
- /**
- * Retrieve the permalink for the post comments feed.
- *
- * @since 2.2.0
- *
- * @param int $post_id Optional. Post ID.
- * @param string $feed Optional. Feed type.
- * @return string
- */
- function get_post_comments_feed_link($post_id = 0, $feed = '') {
- $post_id = absint( $post_id );
- if ( ! $post_id )
- $post_id = get_the_ID();
- if ( empty( $feed ) )
- $feed = get_default_feed();
- if ( '' != get_option('permalink_structure') ) {
- if ( 'page' == get_option('show_on_front') && $post_id == get_option('page_on_front') )
- $url = _get_page_link( $post_id );
- else
- $url = get_permalink($post_id);
- $url = trailingslashit($url) . 'feed';
- if ( $feed != get_default_feed() )
- $url .= "/$feed";
- $url = user_trailingslashit($url, 'single_feed');
- } else {
- $type = get_post_field('post_type', $post_id);
- if ( 'page' == $type )
- $url = add_query_arg( array( 'feed' => $feed, 'page_id' => $post_id ), home_url( '/' ) );
- else
- $url = add_query_arg( array( 'feed' => $feed, 'p' => $post_id ), home_url( '/' ) );
- }
- /**
- * Filter the post comments feed permalink.
- *
- * @since 1.5.1
- *
- * @param string $url Post comments feed permalink.
- */
- return apply_filters( 'post_comments_feed_link', $url );
- }
- /**
- * Display the comment feed link for a post.
- *
- * Prints out the comment feed link for a post. Link text is placed in the
- * anchor. If no link text is specified, default text is used. If no post ID is
- * specified, the current post is used.
- *
- * @since 2.5.0
- *
- * @param string $link_text Descriptive text.
- * @param int $post_id Optional post ID. Default to current post.
- * @param string $feed Optional. Feed format.
- * @return string Link to the comment feed for the current post.
- */
- function post_comments_feed_link( $link_text = '', $post_id = '', $feed = '' ) {
- $url = esc_url( get_post_comments_feed_link( $post_id, $feed ) );
- if ( empty($link_text) )
- $link_text = __('Comments Feed');
- /**
- * Filter the post comment feed link anchor tag.
- *
- * @since 2.8.0
- *
- * @param string $link The complete anchor tag for the comment feed link.
- * @param int $post_id Post ID.
- * @param string $feed The feed type, or an empty string for the default feed type.
- */
- echo apply_filters( 'post_comments_feed_link_html', "<a href='$url'>$link_text</a>", $post_id, $feed );
- }
- /**
- * Retrieve the feed link for a given author.
- *
- * Returns a link to the feed for all posts by a given author. A specific feed
- * can be requested or left blank to get the default feed.
- *
- * @since 2.5.0
- *
- * @param int $author_id ID of an author.
- * @param string $feed Optional. Feed type.
- * @return string Link to the feed for the author specified by $author_id.
- */
- function get_author_feed_link( $author_id, $feed = '' ) {
- $author_id = (int) $author_id;
- $permalink_structure = get_option('permalink_structure');
- if ( empty($feed) )
- $feed = get_default_feed();
- if ( '' == $permalink_structure ) {
- $link = home_url("?feed=$feed&author=" . $author_id);
- } else {
- $link = get_author_posts_url($author_id);
- if ( $feed == get_default_feed() )
- $feed_link = 'feed';
- else
- $feed_link = "feed/$feed";
- $link = trailingslashit($link) . user_trailingslashit($feed_link, 'feed');
- }
- /**
- * Filter the feed link for a given author.
- *
- * @since 1.5.1
- *
- * @param string $link The author feed link.
- * @param string $feed Feed type.
- */
- $link = apply_filters( 'author_feed_link', $link, $feed );
- return $link;
- }
- /**
- * Retrieve the feed link for a category.
- *
- * Returns a link to the feed for all posts in a given category. A specific feed
- * can be requested or left blank to get the default feed.
- *
- * @since 2.5.0
- *
- * @param int $cat_id ID of a category.
- * @param string $feed Optional. Feed type.
- * @return string Link to the feed for the category specified by $cat_id.
- */
- function get_category_feed_link($cat_id, $feed = '') {
- return get_term_feed_link($cat_id, 'category', $feed);
- }
- /**
- * Retrieve the feed link for a term.
- *
- * Returns a link to the feed for all posts in a given term. A specific feed
- * can be requested or left blank to get the default feed.
- *
- * @since 3.0.0
- *
- * @param int $term_id ID of a category.
- * @param string $taxonomy Optional. Taxonomy of $term_id
- * @param string $feed Optional. Feed type.
- * @return string Link to the feed for the term specified by $term_id and $taxonomy.
- */
- function get_term_feed_link( $term_id, $taxonomy = 'category', $feed = '' ) {
- $term_id = ( int ) $term_id;
- $term = get_term( $term_id, $taxonomy );
- if ( empty( $term ) || is_wp_error( $term ) )
- return false;
- if ( empty( $feed ) )
- $feed = get_default_feed();
- $permalink_structure = get_option( 'permalink_structure' );
- if ( '' == $permalink_structure ) {
- if ( 'category' == $taxonomy ) {
- $link = home_url("?feed=$feed&cat=$term_id");
- }
- elseif ( 'post_tag' == $taxonomy ) {
- $link = home_url("?feed=$feed&tag=$term->slug");
- } else {
- $t = get_taxonomy( $taxonomy );
- $link = home_url("?feed=$feed&$t->query_var=$term->slug");
- }
- } else {
- $link = get_term_link( $term_id, $term->taxonomy );
- if ( $feed == get_default_feed() )
- $feed_link = 'feed';
- else
- $feed_link = "feed/$feed";
- $link = trailingslashit( $link ) . user_trailingslashit( $feed_link, 'feed' );
- }
- if ( 'category' == $taxonomy ) {
- /**
- * Filter the category feed link.
- *
- * @since 1.5.1
- *
- * @param string $link The category feed link.
- * @param string $feed Feed type.
- */
- $link = apply_filters( 'category_feed_link', $link, $feed );
- } elseif ( 'post_tag' == $taxonomy ) {
- /**
- * Filter the post tag feed link.
- *
- * @since 2.3.0
- *
- * @param string $link The tag feed link.
- * @param string $feed Feed type.
- */
- $link = apply_filters( 'tag_feed_link', $link, $feed );
- } else {
- /**
- * Filter the feed link for a taxonomy other than 'category' or 'post_tag'.
- *
- * @since 3.0.0
- *
- * @param string $link The taxonomy feed link.
- * @param string $feed Feed type.
- * @param string $feed The taxonomy name.
- */
- $link = apply_filters( 'taxonomy_feed_link', $link, $feed, $taxonomy );
- }
- return $link;
- }
- /**
- * Retrieve permalink for feed of tag.
- *
- * @since 2.3.0
- *
- * @param int $tag_id Tag ID.
- * @param string $feed Optional. Feed type.
- * @return string
- */
- function get_tag_feed_link($tag_id, $feed = '') {
- return get_term_feed_link($tag_id, 'post_tag', $feed);
- }
- /**
- * Retrieve edit tag link.
- *
- * @since 2.7.0
- *
- * @param int $tag_id Tag ID
- * @param string $taxonomy Taxonomy
- * @return string
- */
- function get_edit_tag_link( $tag_id, $taxonomy = 'post_tag' ) {
- /**
- * Filter the edit link for a tag (or term in another taxonomy).
- *
- * @since 2.7.0
- *
- * @param string $link The term edit link.
- */
- return apply_filters( 'get_edit_tag_link', get_edit_term_link( $tag_id, $taxonomy ) );
- }
- /**
- * Display or retrieve edit tag link with formatting.
- *
- * @since 2.7.0
- *
- * @param string $link Optional. Anchor text.
- * @param string $before Optional. Display before edit link.
- * @param string $after Optional. Display after edit link.
- * @param object $tag Tag object.
- * @return string HTML content.
- */
- function edit_tag_link( $link = '', $before = '', $after = '', $tag = null ) {
- $link = edit_term_link( $link, '', '', $tag, false );
- /**
- * Filter the anchor tag for the edit link for a tag (or term in another taxonomy).
- *
- * @since 2.7.0
- *
- * @param string $link The anchor tag for the edit link.
- */
- echo $before . apply_filters( 'edit_tag_link', $link ) . $after;
- }
- /**
- * Retrieve edit term url.
- *
- * @since 3.1.0
- *
- * @param int $term_id Term ID
- * @param string $taxonomy Taxonomy
- * @param string $object_type The object type
- * @return string
- */
- function get_edit_term_link( $term_id, $taxonomy, $object_type = '' ) {
- $tax = get_taxonomy( $taxonomy );
- if ( !current_user_can( $tax->cap->edit_terms ) )
- return;
- $term = get_term( $term_id, $taxonomy );
- $args = array(
- 'action' => 'edit',
- 'taxonomy' => $taxonomy,
- 'tag_ID' => $term->term_id,
- );
- if ( $object_type )
- $args['post_type'] = $object_type;
- $location = add_query_arg( $args, admin_url( 'edit-tags.php' ) );
- /**
- * Filter the edit link for a term.
- *
- * @since 3.1.0
- *
- * @param string $location The edit link.
- * @param int $term_id Term ID.
- * @param string $taxonomy Taxonomy name.
- * @param string $object_type The object type (eg. the post type).
- */
- return apply_filters( 'get_edit_term_link', $location, $term_id, $taxonomy, $object_type );
- }
- /**
- * Display or retrieve edit term link with formatting.
- *
- * @since 3.1.0
- *
- * @param string $link Optional. Anchor text.
- * @param string $before Optional. Display before edit link.
- * @param string $after Optional. Display after edit link.
- * @param object $term Term object.
- * @return string HTML content.
- */
- function edit_term_link( $link = '', $before = '', $after = '', $term = null, $echo = true ) {
- if ( is_null( $term ) )
- $term = get_queried_object();
- if ( ! $term )
- return;
- $tax = get_taxonomy( $term->taxonomy );
- if ( ! current_user_can( $tax->cap->edit_terms ) )
- return;
- if ( empty( $link ) )
- $link = __('Edit This');
- $link = '<a href="' . get_edit_term_link( $term->term_id, $term->taxonomy ) . '">' . $link . '</a>';
- /**
- * Filter the anchor tag for the edit link of a term.
- *
- * @since 3.1.0
- *
- * @param string $link The anchor tag for the edit link.
- * @param int $term_id Term ID.
- */
- $link = $before . apply_filters( 'edit_term_link', $link, $term->term_id ) . $after;
- if ( $echo )
- echo $link;
- else
- return $link;
- }
- /**
- * Retrieve permalink for search.
- *
- * @since 3.0.0
- *
- * @param string $query Optional. The query string to use. If empty the current query is used.
- * @return string
- */
- function get_search_link( $query = '' ) {
- global $wp_rewrite;
- if ( empty($query) )
- $search = get_search_query( false );
- else
- $search = stripslashes($query);
- $permastruct = $wp_rewrite->get_search_permastruct();
- if ( empty( $permastruct ) ) {
- $link = home_url('?s=' . urlencode($search) );
- } else {
- $search = urlencode($search);
- $search = str_replace('%2F', '/', $search); // %2F(/) is not valid within a URL, send it unencoded.
- $link = str_replace( '%search%', $search, $permastruct );
- $link = home_url( user_trailingslashit( $link, 'search' ) );
- }
- /**
- * Filter the search permalink.
- *
- * @since 3.0.0
- *
- * @param string $link Search permalink.
- * @param string $search The URL-encoded search term.
- */
- return apply_filters( 'search_link', $link, $search );
- }
- /**
- * Retrieve the permalink for the feed of the search results.
- *
- * @since 2.5.0
- *
- * @param string $search_query Optional. Search query.
- * @param string $feed Optional. Feed type.
- * @return string
- */
- function get_search_feed_link($search_query = '', $feed = '') {
- global $wp_rewrite;
- $link = get_search_link($search_query);
- if ( empty($feed) )
- $feed = get_default_feed();
- $permastruct = $wp_rewrite->get_search_permastruct();
- if ( empty($permastruct) ) {
- $link = add_query_arg('feed', $feed, $link);
- } else {
- $link = trailingslashit($link);
- $link .= "feed/$feed/";
- }
- /**
- * Filter the search feed link.
- *
- * @since 2.5.0
- *
- * @param string $link Search feed link.
- * @param string $feed Feed type.
- * @param string $type The search type. One of 'posts' or 'comments'.
- */
- $link = apply_filters( 'search_feed_link', $link, $feed, 'posts' );
- return $link;
- }
- /**
- * Retrieve the permalink for the comments feed of the search results.
- *
- * @since 2.5.0
- *
- * @param string $search_query Optional. Search query.
- * @param string $feed Optional. Feed type.
- * @return string
- */
- function get_search_comments_feed_link($search_query = '', $feed = '') {
- global $wp_rewrite;
- if ( empty($feed) )
- $feed = get_default_feed();
- $link = get_search_feed_link($search_query, $feed);
- $permastruct = $wp_rewrite->get_search_permastruct();
- if ( empty($permastruct) )
- $link = add_query_arg('feed', 'comments-' . $feed, $link);
- else
- $link = add_query_arg('withcomments', 1, $link);
- /** This filter is documented in wp-includes/link-template.php */
- $link = apply_filters('search_feed_link', $link, $feed, 'comments');
- return $link;
- }
- /**
- * Retrieve the permalink for a post type archive.
- *
- * @since 3.1.0
- *
- * @param string $post_type Post type
- * @return string
- */
- function get_post_type_archive_link( $post_type ) {
- global $wp_rewrite;
- if ( ! $post_type_obj = get_post_type_object( $post_type ) )
- return false;
- if ( ! $post_type_obj->has_archive )
- return false;
- if ( get_option( 'permalink_structure' ) && is_array( $post_type_obj->rewrite ) ) {
- $struct = ( true === $post_type_obj->has_archive ) ? $post_type_obj->rewrite['slug'] : $post_type_obj->has_archive;
- if ( $post_type_obj->rewrite['with_front'] )
- $struct = $wp_rewrite->front . $struct;
- else
- $struct = $wp_rewrite->root . $struct;
- $link = home_url( user_trailingslashit( $struct, 'post_type_archive' ) );
- } else {
- $link = home_url( '?post_type=' . $post_type );
- }
- /**
- * Filter the post type archive permalink.
- *
- * @since 3.1.0
- *
- * @param string $link The post type archive permalink.
- * @param string $post_type Post type name.
- */
- return apply_filters( 'post_type_archive_link', $link, $post_type );
- }
- /**
- * Retrieve the permalink for a post type archive feed.
- *
- * @since 3.1.0
- *
- * @param string $post_type Post type
- * @param string $feed Optional. Feed type
- * @return string
- */
- function get_post_type_archive_feed_link( $post_type, $feed = '' ) {
- $default_feed = get_default_feed();
- if ( empty( $feed ) )
- $feed = $default_feed;
- if ( ! $link = get_post_type_archive_link( $post_type ) )
- return false;
- $post_type_obj = get_post_type_object( $post_type );
- if ( get_option( 'permalink_structure' ) && is_array( $post_type_obj->rewrite ) && $post_type_obj->rewrite['feeds'] ) {
- $link = trailingslashit( $link );
- $link .= 'feed/';
- if ( $feed != $default_feed )
- $link .= "$feed/";
- } else {
- $link = add_query_arg( 'feed', $feed, $link );
- }
- /**
- * Filter the post type archive feed link.
- *
- * @since 3.1.0
- *
- * @param string $link The post type archive feed link.
- * @param string $feed Feed type.
- */
- return apply_filters( 'post_type_archive_feed_link', $link, $feed );
- }
- /**
- * Retrieve edit posts link for post.
- *
- * Can be used within the WordPress loop or outside of it. Can be used with
- * pages, posts, attachments, and revisions.
- *
- * @since 2.3.0
- *
- * @param int $id Optional. Post ID.
- * @param string $context Optional, defaults to display. How to write the '&', defaults to '&'.
- * @return string
- */
- function get_edit_post_link( $id = 0, $context = 'display' ) {
- if ( ! $post = get_post( $id ) )
- return;
- if ( 'revision' === $post->post_type )
- $action = '';
- elseif ( 'display' == $context )
- $action = '&action=edit';
- else
- $action = '&action=edit';
- $post_type_object = get_post_type_object( $post->post_type );
- if ( !$post_type_object )
- return;
- if ( !current_user_can( 'edit_post', $post->ID ) )
- return;
- /**
- * Filter the post edit link.
- *
- * @since 2.3.0
- *
- * @param string $link The edit link.
- * @param int $post_id Post ID.
- * @param string $context The link context. If set to 'display' then ampersands
- * are encoded.
- */
- return apply_filters( 'get_edit_post_link', admin_url( sprintf( $post_type_object->_edit_link . $action, $post->ID ) ), $post->ID, $context );
- }
- /**
- * Display edit post link for post.
- *
- * @since 1.0.0
- *
- * @param string $text Optional. Anchor text.
- * @param string $before Optional. Display before edit link.
- * @param string $after Optional. Display after edit link.
- * @param int $id Optional. Post ID.
- */
- function edit_post_link( $text = null, $before = '', $after = '', $id = 0 ) {
- if ( ! $post = get_post( $id ) ) {
- return;
- }
- if ( ! $url = get_edit_post_link( $post->ID ) ) {
- return;
- }
- if ( null === $text ) {
- $text = __( 'Edit This' );
- }
- $link = '<a class="post-edit-link" href="' . $url . '">' . $text . '</a>';
- /**
- * Filter the post edit link anchor tag.
- *
- * @since 2.3.0
- *
- * @param string $link Anchor tag for the edit link.
- * @param int $post_id Post ID.
- * @param string $text Anchor text.
- */
- echo $before . apply_filters( 'edit_post_link', $link, $post->ID, $text ) . $after;
- }
- /**
- * Retrieve delete posts link for post.
- *
- * Can be used within the WordPress loop or outside of it, with any post type.
- *
- * @since 2.9.0
- *
- * @param int $id Optional. Post ID.
- * @param string $deprecated Not used.
- * @param bool $force_delete Whether to bypass trash and force deletion. Default is false.
- * @return string
- */
- function get_delete_post_link( $id = 0, $deprecated = '', $force_delete = false ) {
- if ( ! empty( $deprecated ) )
- _deprecated_argument( __FUNCTION__, '3.0' );
- if ( !$post = get_post( $id ) )
- return;
- $post_type_object = get_post_type_object( $post->post_type );
- if ( !$post_type_object )
- return;
- if ( !current_user_can( 'delete_post', $post->ID ) )
- return;
- $action = ( $force_delete || !EMPTY_TRASH_DAYS ) ? 'delete' : 'trash';
- $delete_link = add_query_arg( 'action', $action, admin_url( sprintf( $post_type_object->_edit_link, $post->ID ) ) );
- /**
- * Filter the post delete link.
- *
- * @since 2.9.0
- *
- * @param string $link The delete link.
- * @param int $post_id Post ID.
- * @param bool $force_delete Whether to bypass the trash and force deletion. Default false.
- */
- return apply_filters( 'get_delete_post_link', wp_nonce_url( $delete_link, "$action-post_{$post->ID}" ), $post->ID, $force_delete );
- }
- /**
- * Retrieve edit comment link.
- *
- * @since 2.3.0
- *
- * @param int $comment_id Optional. Comment ID.
- * @return string
- */
- function get_edit_comment_link( $comment_id = 0 ) {
- $comment = get_comment( $comment_id );
- if ( !current_user_can( 'edit_comment', $comment->comment_ID ) )
- return;
- $location = admin_url('comment.php?action=editcomment&c=') . $comment->comment_ID;
- /**
- * Filter the comment edit link.
- *
- * @since 2.3.0
- *
- * @param string $location The edit link.
- */
- return apply_filters( 'get_edit_comment_link', $location );
- }
- /**
- * Display edit comment link with formatting.
- *
- * @since 1.0.0
- *
- * @param string $text Optional. Anchor text.
- * @param string $before Optional. Display before edit link.
- * @param string $after Optional. Display after edit link.
- */
- function edit_comment_link( $text = null, $before = '', $after = '' ) {
- global $comment;
- if ( ! current_user_can( 'edit_comment', $comment->comment_ID ) ) {
- return;
- }
- if ( null === $text ) {
- $text = __( 'Edit This' );
- }
- $link = '<a class="comment-edit-link" href="' . get_edit_comment_link( $comment->comment_ID ) . '">' . $text . '</a>';
- /**
- * Filter the comment edit link anchor tag.
- *
- * @since 2.3.0
- *
- * @param string $link Anchor tag for the edit link.
- * @param int $comment_id Comment ID.
- * @param string $text Anchor text.
- */
- echo $before . apply_filters( 'edit_comment_link', $link, $comment->comment_ID, $text ) . $after;
- }
- /**
- * Display edit bookmark (literally a URL external to blog) link.
- *
- * @since 2.7.0
- *
- * @param int $link Optional. Bookmark ID.
- * @return string
- */
- function get_edit_bookmark_link( $link = 0 ) {
- $link = get_bookmark( $link );
- if ( !current_user_can('manage_links') )
- return;
- $location = admin_url('link.php?action=edit&link_id=') . $link->link_id;
- /**
- * Filter the bookmark (link) edit link.
- *
- * @since 2.7.0
- *
- * @param string $location The edit link.
- * @param int $link_id Bookmark ID.
- */
- return apply_filters( 'get_edit_bookmark_link', $location, $link->link_id );
- }
- /**
- * Display edit bookmark (literally a URL external to blog) link anchor content.
- *
- * @since 2.7.0
- *
- * @param string $link Optional. Anchor text.
- * @param string $before Optional. Display before edit link.
- * @param string $after Optional. Display after edit link.
- * @param int $bookmark Optional. Bookmark ID.
- */
- function edit_bookmark_link( $link = '', $before = '', $after = '', $bookmark = null ) {
- $bookmark = get_bookmark($bookmark);
- if ( !current_user_can('manage_links') )
- return;
- if ( empty($link) )
- $link = __('Edit This');
- $link = '<a href="' . get_edit_bookmark_link( $bookmark ) . '">' . $link . '</a>';
- /**
- * Filter the bookmark edit link anchor tag.
- *
- * @since 2.7.0
- *
- * @param string $link Anchor tag for the edit link.
- * @param int $link_id Bookmark ID.
- */
- echo $before . apply_filters( 'edit_bookmark_link', $link, $bookmark->link_id ) . $after;
- }
- /**
- * Retrieve edit user link
- *
- * @since 3.5.0
- *
- * @param int $user_id Optional. User ID. Defaults to the current user.
- * @return string URL to edit user page or empty string.
- */
- function get_edit_user_link( $user_id = null ) {
- if ( ! $user_id )
- $user_id = get_current_user_id();
- if ( empty( $user_id ) || ! current_user_can( 'edit_user', $user_id ) )
- return '';
- $user = get_userdata( $user_id );
- if ( ! $user )
- return '';
- if ( get_current_user_id() == $user->ID )
- $link = get_edit_profile_url( $user->ID );
- else
- $link = add_query_arg( 'user_id', $user->ID, self_admin_url( 'user-edit.php' ) );
- /**
- * Filter the user edit link.
- *
- * @since 3.5.0
- *
- * @param string $link The edit link.
- * @param int $user_id User ID.
- */
- return apply_filters( 'get_edit_user_link', $link, $user->ID );
- }
- // Navigation links
- /**
- * Retrieve previous post that is adjacent to current post.
- *
- * @since 1.5.0
- *
- * @param bool $in_same_term Optional. Whether post should be in a same taxonomy term.
- * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
- * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
- * @return mixed Post object if successful. Null if global $post is not set. Empty string if no corresponding post exists.
- */
- function get_previous_post( $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
- return get_adjacent_post( $in_same_term, $excluded_terms, true, $taxonomy );
- }
- /**
- * Retrieve next post that is adjacent to current post.
- *
- * @since 1.5.0
- *
- * @param bool $in_same_term Optional. Whether post should be in a same taxonomy term.
- * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
- * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
- * @return mixed Post object if successful. Null if global $post is not set. Empty string if no corresponding post exists.
- */
- function get_next_post( $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
- return get_adjacent_post( $in_same_term, $excluded_terms, false, $taxonomy );
- }
- /**
- * Retrieve adjacent post.
- *
- * Can either be next or previous post.
- *
- * @since 2.5.0
- *
- * @param bool $in_same_term Optional. Whether post should be in a same taxonomy term.
- * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
- * @param bool $previous Optional. Whether to retrieve previous post.
- * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
- * @return mixed Post object if successful. Null if global $post is not set. Empty string if no corresponding post exists.
- */
- function get_adjacent_post( $in_same_term = false, $excluded_terms = '', $previous = true, $taxonomy = 'category' ) {
- global $wpdb;
- if ( ( ! $post = get_post() ) || ! taxonomy_exists( $taxonomy ) )
- return null;
- $current_post_date = $post->post_date;
- $join = '';
- $posts_in_ex_terms_sql = '';
- if ( $in_same_term || ! empty( $excluded_terms ) ) {
- $join = " INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id INNER JOIN $wpdb->term_taxonomy tt ON tr.term_taxonomy_id = tt.term_taxonomy_id";
- if ( $in_same_term ) {
- if ( ! is_object_in_taxonomy( $post->post_type, $taxonomy ) )
- return '';
- $term_array = wp_get_object_terms( $post->ID, $taxonomy, array( 'fields' => 'ids' ) );
- if ( ! $term_array || is_wp_error( $term_array ) )
- return '';
- $join .= $wpdb->prepare( " AND tt.taxonomy = %s AND tt.term_id IN (" . implode( ',', array_map( 'intval', $term_array ) ) . ")", $taxonomy );
- }
- $posts_in_ex_terms_sql = $wpdb->prepare( "AND tt.taxonomy = %s", $taxonomy );
- if ( ! empty( $excluded_terms ) ) {
- if ( ! is_array( $excluded_terms ) ) {
- // back-compat, $excluded_terms used to be $excluded_terms with IDs separated by " and "
- if ( false !== strpos( $excluded_terms, ' and ' ) ) {
- _deprecated_argument( __FUNCTION__, '3.3', sprintf( __( 'Use commas instead of %s to separate excluded terms.' ), "'and'" ) );
- $excluded_terms = explode( ' and ', $excluded_terms );
- } else {
- $excluded_terms = explode( ',', $excluded_terms );
- }
- }
- $excluded_terms = array_map( 'intval', $excluded_terms );
- if ( ! empty( $term_array ) ) {
- $excluded_terms = array_diff( $excluded_terms, $term_array );
- $posts_in_ex_terms_sql = '';
- }
- if ( ! empty( $excluded_terms ) ) {
- $posts_in_ex_terms_sql = $wpdb->prepare( " AND tt.taxonomy = %s AND tt.term_id NOT IN (" . implode( $excluded_terms, ',' ) . ')', $taxonomy );
- }
- }
- }
- $adjacent = $previous ? 'previous' : 'next';
- $op = $previous ? '<' : '>';
- $order = $previous ? 'DESC' : 'ASC';
- /**
- * Filter the JOIN clause in the SQL for an adjacent post query.
- *
- * The dynamic portion of the hook name, $adjacent, refers to the type
- * of adjacency, 'next' or 'previous'.
- *
- * @since 2.5.0
- *
- * @param string $join The JOIN clause in the SQL.
- * @param bool $in_same_term Whether post should be in a same taxonomy term.
- * @param array $excluded_terms Array of excluded term IDs.
- */
- $join = apply_filters( "get_{$adjacent}_post_join", $join, $in_same_term, $excluded_terms );
- /**
- * Filter the WHERE clause in the SQL for an adjacent post query.
- *
- * The dynamic portion of the hook name, $adjacent, refers to the type
- * of adjacency, 'next' or 'previous'.
- *
- * @since 2.5.0
- *
- * @param string $where The WHERE clause in the SQL.
- * @param bool $in_same_term Whether post should be in a same taxonomy term.
- * @param array $excluded_terms Array of excluded term IDs.
- */
- $where = apply_filters( "get_{$adjacent}_post_where", $wpdb->prepare( "WHERE p.post_date $op %s AND p.post_type = %s AND p.post_status = 'publish' $posts_in_ex_terms_sql", $current_post_date, $post->post_type), $in_same_term, $excluded_terms );
- /**
- * Filter the ORDER BY clause in the SQL for an adjacent post query.
- *
- * The dynamic portion of the hook name, $adjacent, refers to the type
- * of adjacency, 'next' or 'previous'.
- *
- * @since 2.5.0
- *
- * @param string $order_by The ORDER BY clause in the SQL.
- */
- $sort = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order LIMIT 1" );
- $query = "SELECT p.ID FROM $wpdb->posts AS p $join $where $sort";
- $query_key = 'adjacent_post_' . md5( $query );
- $result = wp_cache_get( $query_key, 'counts' );
- if ( false !== $result ) {
- if ( $result )
- $result = get_post( $result );
- return $result;
- }
- $result = $wpdb->get_var( $query );
- if ( null === $result )
- $result = '';
- wp_cache_set( $query_key, $result, 'counts' );
- if ( $result )
- $result = get_post( $result );
- return $result;
- }
- /**
- * Get adjacent post relational link.
- *
- * Can either be next or previous post relational link.
- *
- * @since 2.8.0
- *
- * @param string $title Optional. Link title format.
- * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term.
- * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
- * @param bool $previous Optional. Whether to display link to previous or next post. Default true.
- * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
- * @return string
- */
- function get_adjacent_post_rel_link( $title = '%title', $in_same_term = false, $excluded_terms = '', $previous = true, $taxonomy = 'category' ) {
- if ( $previous && is_attachment() && $post = get_post() )
- $post = get_post( $post->post_parent );
- else
- $post = get_adjacent_post( $in_same_term, $excluded_terms, $previous, $taxonomy );
- if ( empty( $post ) )
- return;
- $post_title = the_title_attribute( array( 'echo' => false, 'post' => $post ) );
- if ( empty( $post_title ) )
- $post_title = $previous ? __( 'Previous Post' ) : __( 'Next Post' );
- $date = mysql2date( get_option( 'date_format' ), $post->post_date );
- $title = str_replace( '%title', $post_title, $title );
- $title = str_replace( '%date', $date, $title );
- $link = $previous ? "<link rel='prev' title='" : "<link rel='next' title='";
- $link .= esc_attr( $title );
- $link .= "' href='" . get_permalink( $post ) . "' />\n";
- $adjacent = $previous ? 'previous' : 'next';
- /**
- * Filter the adjacent post relational link.
- *
- * The dynamic portion of the hook name, $adjacent, refers to the type
- * of adjacency, 'next' or 'previous'.
- *
- * @since 2.8.0
- *
- * @param string $link The relational link.
- */
- return apply_filters( "{$adjacent}_post_rel_link", $link );
- }
- /**
- * Display relational links for the posts adjacent to the current post.
- *
- * @since 2.8.0
- *
- * @param string $title Optional. Link title format.
- * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term.
- * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
- * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
- */
- function adjacent_posts_rel_link( $title = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
- echo get_adjacent_post_rel_link( $title, $in_same_term, $excluded_terms, true, $taxonomy );
- echo get_adjacent_post_rel_link( $title, $in_same_term, $excluded_terms, false, $taxonomy );
- }
- /**
- * Display relational links for the posts adjacent to the current post for single post pages.
- *
- * This is meant to be attached to actions like 'wp_head'. Do not call this directly in plugins or theme templates.
- * @since 3.0.0
- *
- */
- function adjacent_posts_rel_link_wp_head() {
- if ( ! is_single() ) {
- return;
- }
- adjacent_posts_rel_link();
- }
- /**
- * Display relational link for the next post adjacent to the current post.
- *
- * @since 2.8.0
- *
- * @param string $title Optional. Link title format.
- * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term.
- * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
- * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
- */
- function next_post_rel_link( $title = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
- echo get_adjacent_post_rel_link( $title, $in_same_term, $excluded_terms, false, $taxonomy );
- }
- /**
- * Display relational link for the previous post adjacent to the current post.
- *
- * @since 2.8.0
- *
- * @param string $title Optional. Link title format.
- * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term.
- * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default true.
- * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
- */
- function prev_post_rel_link( $title = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
- echo get_adjacent_post_rel_link( $title, $in_same_term, $excluded_terms, true, $taxonomy );
- }
- /**
- * Retrieve boundary post.
- *
- * Boundary being either the first or last post by publish date within the constraints speciā¦
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