enmi-conf.org: comparison wp/wp-includes/link-template.php

equal deleted inserted replaced

-:346c88efed21
+:5e2f62d02dcd
 /**
 * Display the permalink for the current post.
 *
 * @since 1.2.0
-* @uses apply_filters() Calls 'the_permalink' filter on the permalink string.
 */
 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.
 * @since 2.2.0
 * @uses $wp_rewrite
 *
 * @param string $string URL with or without a trailing slash.
 * @param string $type_of_url The type of URL being considered (e.g. single, category, etc) for use in the filter.
-* @return string
+* @return string The URL with the trailing slash appended or stripped.
 */
 function user_trailingslashit($string, $type_of_url = '') {
 	global $wp_rewrite;
 	if ( $wp_rewrite->use_trailing_slashes )
 		$string = trailingslashit($string);
 	else
 		$string = untrailingslashit($string);
-	// Note that $type_of_url can be one of following:
+	/**
-	// single, single_trackback, single_feed, single_paged, feed, category, page, year, month, day, paged, post_type_archive
+	 * Filter the trailing slashed string, depending on whether the site is set
-	$string = apply_filters('user_trailingslashit', $string, $type_of_url);
+	 * 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.
 }
 /**
 * 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, defaults to the current post.
+* @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, defaults to false.
+* @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 ) {
 	$rewritecode = array(
 		'%year%',
 	if ( empty($post->ID) )
 		return false;
 	if ( $post->post_type == 'page' )
-		return get_page_link($post->ID, $leavename, $sample);
+		return get_page_link($post, $leavename, $sample);
 	elseif ( $post->post_type == 'attachment' )
-		return get_attachment_link( $post->ID, $leavename );
+		return get_attachment_link( $post, $leavename );
 	elseif ( in_array($post->post_type, get_post_types( array('_builtin' => false) ) ) )
-		return get_post_permalink($post->ID, $leavename, $sample);
+		return get_post_permalink($post, $leavename, $sample);
 	$permalink = get_option('permalink_structure');
-	$permalink = apply_filters('pre_post_link', $permalink, $post, $leavename);
+	/**
+	 * Filter the permalink structure for a post before token replacement occurs.
-	if ( '' != $permalink && !in_array($post->post_status, array('draft', 'pending', 'auto-draft')) ) {
+	 *
+	 * 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', 'future' ) ) ) {
 		$unixtime = strtotime($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;
 			}
 		$permalink = home_url( str_replace($rewritecode, $rewritereplace, $permalink) );
 		$permalink = user_trailingslashit($permalink, 'single');
 	} else { // if they're not using the fancy permalink option
 		$permalink = home_url('?p=' . $post->ID);
 	}
-	return apply_filters('post_link', $permalink, $post, $leavename);
+	/**
+	 * 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
+* @return string The post permalink.
 */
 function get_post_permalink( $id = 0, $leavename = false, $sample = false ) {
 	global $wp_rewrite;
 	$post = get_post($id);
 	$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' ) );
+	$draft_or_pending = isset( $post->post_status ) && in_array( $post->post_status, array( 'draft', 'pending', 'auto-draft', 'future' ) );
 	$post_type = get_post_type_object($post->post_type);
+	if ( $post_type->hierarchical ) {
+		$slug = get_page_uri( $id );
+	}
 	if ( !empty($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 ) )
 		else
 			$post_link = add_query_arg(array('post_type' => $post->post_type, 'p' => $post->ID), '');
 		$post_link = home_url($post_link);
 	}
-	return apply_filters('post_type_link', $post_link, $post, $leavename, $sample);
+	/**
+	 * 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 $post_id Optional. Post ID.
+* @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 ) )
 * @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
+* @return string The page permalink.
 */
 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.
 * @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
+* @return string The page permalink.
 */
 function _get_page_link( $post = false, $leavename = false, $sample = false ) {
 	global $wp_rewrite;
 	$post = get_post( $post );
 		$link = user_trailingslashit($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.
 *
 * @since 2.0.0
 *
 * @param int|object $post Optional. Post ID or object.
 * @param bool $leavename Optional. Leave name.
-* @return string
+* @return string The attachment permalink.
 */
 function get_attachment_link( $post = null, $leavename = false ) {
 	global $wp_rewrite;
 	$link = false;
 	}
 	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 $year False for current year or year for permalink.
-* @return string
+* @return string The permalink for the specified year archive.
 */
 function get_year_link($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, $yearlink);
-		return apply_filters('year_link', home_url( user_trailingslashit($yearlink, 'year') ), $year);
+		$yearlink = home_url( user_trailingslashit( $yearlink, 'year' ) );
 	} else {
-		return apply_filters('year_link', home_url('?m=' . $year), $year);
+		$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 $month False for current month. Integer of month.
-* @return string
+* @return string The permalink for the specified month and year archive.
 */
 function get_month_link($year, $month) {
 	global $wp_rewrite;
 	if ( !$year )
 		$year = gmdate('Y', current_time('timestamp'));
 		$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), $monthlink);
-		return apply_filters('month_link', home_url( user_trailingslashit($monthlink, 'month') ), $year, $month);
+		$monthlink = home_url( user_trailingslashit( $monthlink, 'month' ) );
 	} else {
-		return apply_filters('month_link', home_url( '?m=' . $year . zeroise($month, 2) ), $year, $month);
+		$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 $day False for current day. Integer of day.
-* @return string
+* @return string The permalink for the specified day, month, and year archive.
 */
 function get_day_link($year, $month, $day) {
 	global $wp_rewrite;
 	if ( !$year )
 		$year = gmdate('Y', 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), $daylink);
-		return apply_filters('day_link', home_url( user_trailingslashit($daylink, 'day') ), $year, $month, $day);
+		$daylink = home_url( user_trailingslashit( $daylink, 'day' ) );
 	} else {
-		return apply_filters('day_link', home_url( '?m=' . $year . zeroise($month, 2) . zeroise($day, 2) ), $year, $month, $day);
+		$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.
 *
 * @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 $feed Optional, defaults to default feed. Feed type.
-* @return string
+* @return string The feed permalink.
 */
 function get_feed_link($feed = '') {
 	global $wp_rewrite;
 	$permalink = $wp_rewrite->get_feed_permastruct();
 			$feed = str_replace('comments_', 'comments-', $feed);
 		$output = home_url("?feed={$feed}");
 	}
-	return apply_filters('feed_link', $output, $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 $feed Optional. Feed type.
-* @return string
+* @return string The permalink for the comments feed for the given post.
 */
 function get_post_comments_feed_link($post_id = 0, $feed = '') {
 	$post_id = absint( $post_id );
 	if ( ! $post_id )
 			$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( '/' ) );
 	}
-	return apply_filters('post_comments_feed_link', $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.
 *
-* @package WordPress
-* @subpackage Feed
 * @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.
 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.
 *
-* @package WordPress
-* @subpackage 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.
 			$feed_link = "feed/$feed";
 		$link = trailingslashit($link) . user_trailingslashit($feed_link, 'feed');
 	}
-	$link = apply_filters('author_feed_link', $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.
 *
-* @package WordPress
-* @subpackage 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.
 * 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
+* @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.
 			$feed_link = "feed/$feed";
 		$link = trailingslashit( $link ) . user_trailingslashit( $feed_link, 'feed' );
 	}
-	if ( 'category' == $taxonomy )
+	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 )
+	} 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
+	} 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;
 }
 /**
 *
 * @since 2.3.0
 *
 * @param int $tag_id Tag ID.
 * @param string $feed Optional. Feed type.
-* @return string
+* @return string The feed permalink for the given tag.
 */
 function get_tag_feed_link($tag_id, $feed = '') {
 	return get_term_feed_link($tag_id, 'post_tag', $feed);
 }
 *
 * @since 2.7.0
 *
 * @param int $tag_id Tag ID
 * @param string $taxonomy Taxonomy
-* @return string
+* @return string The edit tag link URL for the given tag.
 */
 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.
 * @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 int    $term_id     Term ID.
-* @param string $taxonomy Taxonomy
+* @param string $taxonomy    Taxonomy.
-* @param string $object_type The object type
+* @param string $object_type The object type. Used to highlight the proper post type menu on the linked page.
-* @return string
+*                            Defaults to the first object_type associated with the taxonomy.
+* @return string The edit term link URL for the given term.
 */
 function get_edit_term_link( $term_id, $taxonomy, $object_type = '' ) {
 	$tax = get_taxonomy( $taxonomy );
 	if ( !current_user_can( $tax->cap->edit_terms ) )
 		return;
 		'action' => 'edit',
 		'taxonomy' => $taxonomy,
 		'tag_ID' => $term->term_id,
 	);
-	if ( $object_type )
+	if ( $object_type ) {
 		$args['post_type'] = $object_type;
+	} else if ( ! empty( $tax->object_type ) ) {
+		$args['post_type'] = reset( $tax->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.
 	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
+* @param string $query Optional. The query string to use. If empty the current query is used.
-*/
+* @return string The search permalink.
+*/
 function get_search_link( $query = '' ) {
 	global $wp_rewrite;
 	if ( empty($query) )
 		$search = get_search_query( false );
 		$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 $feed Optional. Feed type.
-* @return string
+* @return string The search results feed permalink.
 */
 function get_search_feed_link($search_query = '', $feed = '') {
 	global $wp_rewrite;
 	$link = get_search_link($search_query);
 	} else {
 		$link = trailingslashit($link);
 		$link .= "feed/$feed/";
 	}
-	$link = apply_filters('search_feed_link', $link, $feed, 'posts');
+	/**
+	 * 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;
 }
 /**
 *
 * @since 2.5.0
 *
 * @param string $search_query Optional. Search query.
 * @param string $feed Optional. Feed type.
-* @return string
+* @return string The comments feed search results permalink.
 */
 function get_search_comments_feed_link($search_query = '', $feed = '') {
 	global $wp_rewrite;
 	if ( empty($feed) )
 	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
+* @return string The post type archive permalink.
 */
 function get_post_type_archive_link( $post_type ) {
 	global $wp_rewrite;
 	if ( ! $post_type_obj = get_post_type_object( $post_type ) )
 		return false;
 		$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
+* @return string The post type feed permalink.
 */
 function get_post_type_archive_feed_link( $post_type, $feed = '' ) {
 	$default_feed = get_default_feed();
 	if ( empty( $feed ) )
 		$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.
 *
 * @since 2.3.0
 *
 * @param int $id Optional. Post ID.
 * @param string $context Optional, defaults to display. How to write the '&', defaults to '&amp;'.
-* @return string
+* @return string The edit post link for the given post.
 */
 function get_edit_post_link( $id = 0, $context = 'display' ) {
 	if ( ! $post = get_post( $id ) )
 		return;
 		return;
 	if ( !current_user_can( 'edit_post', $post->ID ) )
 		return;
-	return apply_filters( 'get_edit_post_link', admin_url( sprintf($post_type_object->_edit_link . $action, $post->ID) ), $post->ID, $context );
+	/**
+	 * 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 $link Optional. Anchor text.
+* @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( $link = null, $before = '', $after = '', $id = 0 ) {
+function edit_post_link( $text = null, $before = '', $after = '', $id = 0 ) {
-	if ( !$post = get_post( $id ) )
+	if ( ! $post = get_post( $id ) ) {
 		return;
+	}
-	if ( !$url = get_edit_post_link( $post->ID ) )
+	if ( ! $url = get_edit_post_link( $post->ID ) ) {
 		return;
+	}
-	if ( null === $link )
-		$link = __('Edit This');
+	if ( null === $text ) {
+		$text = __( 'Edit This' );
-	$post_type_obj = get_post_type_object( $post->post_type );
+	}
-	$link = '<a class="post-edit-link" href="' . $url . '">' . $link . '</a>';
-	echo $before . apply_filters( 'edit_post_link', $link, $post->ID ) . $after;
+	$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.
 *
 * @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
+* @return string The delete post link URL for the given post.
 */
 function get_delete_post_link( $id = 0, $deprecated = '', $force_delete = false ) {
 	if ( ! empty( $deprecated ) )
 		_deprecated_argument( __FUNCTION__, '3.0' );
 	$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
+* @return string The edit comment link URL for the given comment.
 */
 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&amp;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 or retrieve edit comment link with formatting.
+* Display edit comment link with formatting.
 *
 * @since 1.0.0
 *
-* @param string $link Optional. Anchor text.
+* @param string $text Optional. Anchor text.
 * @param string $before Optional. Display before edit link.
 * @param string $after Optional. Display after edit link.
-* @return string|null HTML content, if $echo is set to false.
+*/
-*/
+function edit_comment_link( $text = null, $before = '', $after = '' ) {
-function edit_comment_link( $link = null, $before = '', $after = '' ) {
 	global $comment;
-	if ( !current_user_can( 'edit_comment', $comment->comment_ID ) )
+	if ( ! current_user_can( 'edit_comment', $comment->comment_ID ) ) {
 		return;
+	}
-	if ( null === $link )
-		$link = __('Edit This');
+	if ( null === $text ) {
+		$text = __( 'Edit This' );
-	$link = '<a class="comment-edit-link" href="' . get_edit_comment_link( $comment->comment_ID ) . '">' . $link . '</a>';
+	}
-	echo $before . apply_filters( 'edit_comment_link', $link, $comment->comment_ID ) . $after;
+	$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.
+* @param int|stdClass $link Optional. Bookmark ID.
-* @return string
+* @return string The edit bookmark link URL.
 */
 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&amp;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, $link->link_id );
 }
 /**
 * Display edit bookmark (literally a URL external to blog) link anchor content.
 	if ( empty($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
 	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_cat Optional. Whether post should be in a same category.
+* @param bool         $in_same_term   Optional. Whether post should be in a same taxonomy term.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
-* @return mixed Post object if successful. Null if global $post is not set. Empty string if no corresponding post exists.
+* @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_cat = false, $excluded_categories = '') {
+*/
-	return get_adjacent_post($in_same_cat, $excluded_categories);
+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_cat Optional. Whether post should be in a same category.
+* @param bool         $in_same_term   Optional. Whether post should be in a same taxonomy term.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
-* @return mixed Post object if successful. Null if global $post is not set. Empty string if no corresponding post exists.
+* @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_cat = false, $excluded_categories = '') {
+*/
-	return get_adjacent_post($in_same_cat, $excluded_categories, false);
+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_cat Optional. Whether post should be in a same category.
+* @param bool         $in_same_term   Optional. Whether post should be in a same taxonomy term.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @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 bool         $previous       Optional. Whether to retrieve previous post.
-* @return mixed Post object if successful. Null if global $post is not set. Empty string if no corresponding post exists.
+* @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_cat = false, $excluded_categories = '', $previous = true ) {
+*/
+function get_adjacent_post( $in_same_term = false, $excluded_terms = '', $previous = true, $taxonomy = 'category' ) {
 	global $wpdb;
-	if ( ! $post = get_post() )
+	if ( ( ! $post = get_post() ) || ! taxonomy_exists( $taxonomy ) )
 		return null;
 	$current_post_date = $post->post_date;
 	$join = '';
-	$posts_in_ex_cats_sql = '';
+	$where = '';
-	if ( $in_same_cat || ! empty( $excluded_categories ) ) {
+	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";
+		$where = $wpdb->prepare( "AND tt.taxonomy = %s", $taxonomy );
-		if ( $in_same_cat ) {
-			if ( ! is_object_in_taxonomy( $post->post_type, 'category' ) )
+		if ( ! empty( $excluded_terms ) && ! 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 ( $in_same_term ) {
+			if ( ! is_object_in_taxonomy( $post->post_type, $taxonomy ) )
 				return '';
-			$cat_array = wp_get_object_terms($post->ID, 'category', array('fields' => 'ids'));
+			$term_array = wp_get_object_terms( $post->ID, $taxonomy, array( 'fields' => 'ids' ) );
-			if ( ! $cat_array || is_wp_error( $cat_array ) )
+			// Remove any exclusions from the term array to include.
+			$term_array = array_diff( $term_array, (array) $excluded_terms );
+			$term_array = array_map( 'intval', $term_array );
+			if ( ! $term_array || is_wp_error( $term_array ) )
 				return '';
-			$join .= " AND tt.taxonomy = 'category' AND tt.term_id IN (" . implode(',', $cat_array) . ")";
+			$where .= " AND tt.term_id IN (" . implode( ',', $term_array ) . ")";
 		}
-		$posts_in_ex_cats_sql = "AND tt.taxonomy = 'category'";
+		if ( ! empty( $excluded_terms ) ) {
-		if ( ! empty( $excluded_categories ) ) {
+			$where .= " AND p.ID NOT IN ( SELECT tr.object_id FROM $wpdb->term_relationships tr LEFT JOIN $wpdb->term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id) WHERE tt.term_id IN (" . implode( $excluded_terms, ',' ) . ') )';
-			if ( ! is_array( $excluded_categories ) ) {
+		}
-				// back-compat, $excluded_categories used to be IDs separated by " and "
+	}
-				if ( strpos( $excluded_categories, ' and ' ) !== false ) {
-					_deprecated_argument( __FUNCTION__, '3.3', sprintf( __( 'Use commas instead of %s to separate excluded categories.' ), "'and'" ) );
+	// 'post_status' clause depends on the current user.
-					$excluded_categories = explode( ' and ', $excluded_categories );
+	if ( is_user_logged_in() ) {
-				} else {
+		$user_id = get_current_user_id();
-					$excluded_categories = explode( ',', $excluded_categories );
-				}
+		$post_type_object = get_post_type_object( $post->post_type );
-			}
+		if ( empty( $post_type_object ) ) {
+			$post_type_cap    = $post->post_type;
-			$excluded_categories = array_map( 'intval', $excluded_categories );
+			$read_private_cap = 'read_private_' . $post_type_cap . 's';
+		} else {
-			if ( ! empty( $cat_array ) ) {
+			$read_private_cap = $post_type_object->cap->read_private_posts;
-				$excluded_categories = array_diff($excluded_categories, $cat_array);
+		}
-				$posts_in_ex_cats_sql = '';
-			}
+		/*
+		 * Results should include private posts belonging to the current user, or private posts where the
-			if ( !empty($excluded_categories) ) {
+		 * current user has the 'read_private_posts' cap.
-				$posts_in_ex_cats_sql = " AND tt.taxonomy = 'category' AND tt.term_id NOT IN (" . implode($excluded_categories, ',') . ')';
+		 */
+		$private_states = get_post_stati( array( 'private' => true ) );
+		$where .= " AND ( p.post_status = 'publish'";
+		foreach ( (array) $private_states as $state ) {
+			if ( current_user_can( $read_private_cap ) ) {
+				$where .= $wpdb->prepare( " OR p.post_status = %s", $state );
+			} else {
+				$where .= $wpdb->prepare( " OR (p.post_author = %d AND p.post_status = %s)", $user_id, $state );
 			}
 		}
+		$where .= " )";
+	} else {
+		$where .= " AND p.post_status = 'publish'";
 	}
 	$adjacent = $previous ? 'previous' : 'next';
 	$op = $previous ? '<' : '>';
 	$order = $previous ? 'DESC' : 'ASC';
-	$join  = apply_filters( "get_{$adjacent}_post_join", $join, $in_same_cat, $excluded_categories );
+	/**
-	$where = apply_filters( "get_{$adjacent}_post_where", $wpdb->prepare("WHERE p.post_date $op %s AND p.post_type = %s AND p.post_status = 'publish' $posts_in_ex_cats_sql", $current_post_date, $post->post_type), $in_same_cat, $excluded_categories );
+	 * Filter the JOIN clause in the SQL for an adjacent post query.
+	 *
+	 * The dynamic portion of the hook name, `$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 $where", $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);
+	$query_key = 'adjacent_post_' . md5( $query );
-	$result = wp_cache_get($query_key, 'counts');
+	$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');
+	wp_cache_set( $query_key, $result, 'counts' );
 	if ( $result )
 		$result = get_post( $result );
 	return $result;
 *
 * Can either be next or previous post relational link.
 *
 * @since 2.8.0
 *
-* @param string $title Optional. Link title format.
+* @param string       $title          Optional. Link title format.
-* @param bool $in_same_cat Optional. Whether link should be in a same category.
+* @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
-* @param bool $previous Optional, default is true. Whether to display link to previous or next post.
+* @param bool         $previous       Optional. Whether to display link to previous or next post. Default true.
-* @return string
+* @param string       $taxonomy       Optional. Taxonomy, if $in_same_term is true. Default 'category'.
-*/
+* @return string The adjacent post relational link URL.
-function get_adjacent_post_rel_link($title = '%title', $in_same_cat = false, $excluded_categories = '', $previous = true) {
+*/
+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_cat, $excluded_categories, $previous );
+		$post = get_adjacent_post( $in_same_term, $excluded_terms, $previous, $taxonomy );
-	if ( empty($post) )
+	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');
+		$post_title = $previous ? __( 'Previous Post' ) : __( 'Next Post' );
-	$date = mysql2date(get_option('date_format'), $post->post_date);
+	$date = mysql2date( get_option( 'date_format' ), $post->post_date );
-	$title = str_replace('%title', $post_title, $title);
+	$title = str_replace( '%title', $post_title, $title );
-	$title = str_replace('%date', $date, $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";
+	$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 string       $title          Optional. Link title format.
-* @param bool $in_same_cat Optional. Whether link should be in a same category.
+* @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @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_cat = false, $excluded_categories = '') {
+*/
-	echo get_adjacent_post_rel_link($title, $in_same_cat, $excluded_categories = '', true);
+function adjacent_posts_rel_link( $title = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
-	echo get_adjacent_post_rel_link($title, $in_same_cat, $excluded_categories = '', false);
+	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_singular() || is_attachment() )
+	if ( ! is_single() || is_attachment() ) {
 		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 string       $title          Optional. Link title format.
-* @param bool $in_same_cat Optional. Whether link should be in a same category.
+* @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @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_cat = false, $excluded_categories = '') {
+*/
-	echo get_adjacent_post_rel_link($title, $in_same_cat, $excluded_categories = '', false);
+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 string       $title          Optional. Link title format.
-* @param bool $in_same_cat Optional. Whether link should be in a same category.
+* @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @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_cat = false, $excluded_categories = '') {
+*/
-	echo get_adjacent_post_rel_link($title, $in_same_cat, $excluded_categories = '', true);
+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 specified
-* by $in_same_cat or $excluded_categories.
+* by $in_same_term or $excluded_terms.
 *
 * @since 2.8.0
 *
-* @param bool $in_same_cat Optional. Whether returned post should be in a same category.
+* @param bool         $in_same_term   Optional. Whether returned post should be in a same taxonomy term.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
-* @param bool $start Optional. Whether to retrieve first or last post.
+* @param bool         $start          Optional. Whether to retrieve first or last post.
-* @return object
+* @param string       $taxonomy       Optional. Taxonomy, if $in_same_term is true. Default 'category'.
-*/
+* @return mixed Array containing the boundary post object if successful, null otherwise.
-function get_boundary_post( $in_same_cat = false, $excluded_categories = '', $start = true ) {
+*/
+function get_boundary_post( $in_same_term = false, $excluded_terms = '', $start = true, $taxonomy = 'category' ) {
 	$post = get_post();
-	if ( ! $post || ! is_single() || is_attachment() )
+	if ( ! $post || ! is_single() || is_attachment() || ! taxonomy_exists( $taxonomy ) )
 		return null;
-	$cat_array = array();
+	$query_args = array(
-	if( ! is_array( $excluded_categories ) )
+		'posts_per_page' => 1,
-		$excluded_categories = explode( ',', $excluded_categories );
+		'order' => $start ? 'ASC' : 'DESC',
+		'update_post_term_cache' => false,
-	if ( $in_same_cat || ! empty( $excluded_categories ) ) {
+		'update_post_meta_cache' => false
-		if ( $in_same_cat )
+	);
-			$cat_array = wp_get_object_terms( $post->ID, 'category', array( 'fields' => 'ids' ) );
+	$term_array = array();
-		if ( ! empty( $excluded_categories ) ) {
-			$excluded_categories = array_map( 'intval', $excluded_categories );
+	if ( ! is_array( $excluded_terms ) ) {
-			$excluded_categories = array_diff( $excluded_categories, $cat_array );
+		if ( ! empty( $excluded_terms ) )
+			$excluded_terms = explode( ',', $excluded_terms );
-			$inverse_cats = array();
+		else
-			foreach ( $excluded_categories as $excluded_category )
+			$excluded_terms = array();
-				$inverse_cats[] = $excluded_category * -1;
+	}
-			$excluded_categories = $inverse_cats;
+	if ( $in_same_term || ! empty( $excluded_terms ) ) {
+		if ( $in_same_term )
+			$term_array = wp_get_object_terms( $post->ID, $taxonomy, array( 'fields' => 'ids' ) );
+		if ( ! empty( $excluded_terms ) ) {
+			$excluded_terms = array_map( 'intval', $excluded_terms );
+			$excluded_terms = array_diff( $excluded_terms, $term_array );
+			$inverse_terms = array();
+			foreach ( $excluded_terms as $excluded_term )
+				$inverse_terms[] = $excluded_term * -1;
+			$excluded_terms = $inverse_terms;
 		}
-	}
+		$query_args[ 'tax_query' ] = array( array(
-	$categories = implode( ',', array_merge( $cat_array, $excluded_categories ) );
+			'taxonomy' => $taxonomy,
+			'terms' => array_merge( $term_array, $excluded_terms )
-	$order = $start ? 'ASC' : 'DESC';
+		) );
+	}
-	return get_posts( array('numberposts' => 1, 'category' => $categories, 'order' => $order, 'update_post_term_cache' => false, 'update_post_meta_cache' => false) );
+	return get_posts( $query_args );
 }
 /*
 * Get previous post link that is adjacent to the current post.
 *
 * @since 3.7.0
 *
-* @param string $format Optional. Link anchor format.
+* @param string       $format         Optional. Link anchor format.
-* @param string $link Optional. Link permalink format.
+* @param string       $link           Optional. Link permalink format.
-* @param bool $in_same_cat Optional. Whether link should be in same category.
+* @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term.
-* @param string $excluded_categories Optional. Excluded categories IDs.
+* @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
-* @return string
+* @param string       $taxonomy       Optional. Taxonomy, if $in_same_term is true. Default 'category'.
-*/
+* @return string The link URL of the previous post in relation to the current post.
-function get_previous_post_link( $format = '&laquo; %link', $link = '%title', $in_same_cat = false, $excluded_categories = '' ) {
+*/
-	return get_adjacent_post_link( $format, $link, $in_same_cat, $excluded_categories, true );
+function get_previous_post_link( $format = '&laquo; %link', $link = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
+	return get_adjacent_post_link( $format, $link, $in_same_term, $excluded_terms, true, $taxonomy );
 }
 /**
 * Display previous post link that is adjacent to the current post.
 *
 * @since 1.5.0
-* @uses get_previous_post_link()
+* @see get_previous_post_link()
 *
-* @param string $format Optional. Link anchor format.
+* @param string       $format         Optional. Link anchor format.
-* @param string $link Optional. Link permalink format.
+* @param string       $link           Optional. Link permalink format.
-* @param bool $in_same_cat Optional. Whether link should be in a same category.
+* @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @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 previous_post_link( $format = '&laquo; %link', $link = '%title', $in_same_cat = false, $excluded_categories = '' ) {
+*/
-	echo get_previous_post_link( $format, $link, $in_same_cat, $excluded_categories );
+function previous_post_link( $format = '&laquo; %link', $link = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
-}
+	echo get_previous_post_link( $format, $link, $in_same_term, $excluded_terms, $taxonomy );
+}
-/**
-* Get previous post link that is adjacent to the current post.
+/**
+* Get next post link that is adjacent to the current post.
 *
 * @since 3.7.0
-* @uses get_next_post_link()
+*
-*
+* @param string       $format         Optional. Link anchor format.
-* @param string $format Optional. Link anchor format.
+* @param string       $link           Optional. Link permalink format.
-* @param string $link Optional. Link permalink format.
+* @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term.
-* @param bool $in_same_cat Optional. Whether link should be in same category.
+* @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
-* @param string $excluded_categories Optional. Excluded categories IDs.
+* @param string       $taxonomy       Optional. Taxonomy, if $in_same_term is true. Default 'category'.
-* @return string
+* @return string The link URL of the next post in relation to the current post.
 */
-function get_next_post_link( $format = '&laquo; %link', $link = '%title', $in_same_cat = false, $excluded_categories = '' ) {
+function get_next_post_link( $format = '%link &raquo;', $link = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
-	return get_adjacent_post_link( $format, $link, $in_same_cat, $excluded_categories, false );
+	return get_adjacent_post_link( $format, $link, $in_same_term, $excluded_terms, false, $taxonomy );
 }
 /**
 * Display next post link that is adjacent to the current post.
 *
 * @since 1.5.0
-*
+* @see get_next_post_link()
-* @param string $format Optional. Link anchor format.
+*
-* @param string $link Optional. Link permalink format.
+* @param string       $format         Optional. Link anchor format.
-* @param bool $in_same_cat Optional. Whether link should be in a same category.
+* @param string       $link           Optional. Link permalink format.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @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.
-function next_post_link( $format = '%link &raquo;', $link = '%title', $in_same_cat = false, $excluded_categories = '' ) {
+* @param string       $taxonomy       Optional. Taxonomy, if $in_same_term is true. Default 'category'.
-	 echo get_next_post_link( $format, $link, $in_same_cat, $excluded_categories );
+*/
+function next_post_link( $format = '%link &raquo;', $link = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
+	 echo get_next_post_link( $format, $link, $in_same_term, $excluded_terms, $taxonomy );
 }
 /**
 * Get adjacent post link.
 *
 * Can be either next post link or previous.
 *
 * @since 3.7.0
 *
-* @param string $format Link anchor format.
+* @param string       $format         Link anchor format.
-* @param string $link Link permalink format.
+* @param string       $link           Link permalink format.
-* @param bool $in_same_cat Optional. Whether link should be in a same category.
+* @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @param array|string $excluded_terms Optional. Array or comma-separated list of excluded terms IDs.
-* @param bool $previous Optional, default is true. Whether to display link to previous or next post.
+* @param bool         $previous       Optional. Whether to display link to previous or next post. Default true.
-* @return string
+* @param string       $taxonomy       Optional. Taxonomy, if $in_same_term is true. Default 'category'.
-*/
+* @return string The link URL of the previous or next post in relation to the current post.
-function get_adjacent_post_link( $format, $link, $in_same_cat = false, $excluded_categories = '', $previous = true ) {
+*/
+function get_adjacent_post_link( $format, $link, $in_same_term = false, $excluded_terms = '', $previous = true, $taxonomy = 'category' ) {
 	if ( $previous && is_attachment() )
 		$post = get_post( get_post()->post_parent );
 	else
-		$post = get_adjacent_post( $in_same_cat, $excluded_categories, $previous );
+		$post = get_adjacent_post( $in_same_term, $excluded_terms, $previous, $taxonomy );
 	if ( ! $post ) {
 		$output = '';
 	} else {
 		$title = $post->post_title;
 		if ( empty( $post->post_title ) )
 			$title = $previous ? __( 'Previous Post' ) : __( 'Next Post' );
 		/** This filter is documented in wp-includes/post-template.php */
 		$title = apply_filters( 'the_title', $title, $post->ID );
 		$date = mysql2date( get_option( 'date_format' ), $post->post_date );
 		$rel = $previous ? 'prev' : 'next';
 		$string = '<a href="' . get_permalink( $post ) . '" rel="'.$rel.'">';
 		$inlink = str_replace( '%title', $title, $link );
 		$output = str_replace( '%link', $inlink, $format );
 	}
 	$adjacent = $previous ? 'previous' : 'next';
-	return apply_filters( "{$adjacent}_post_link", $output, $format, $link, $post );
+	/**
+	 * Filter the adjacent post link.
+	 *
+	 * The dynamic portion of the hook name, `$adjacent`, refers to the type
+	 * of adjacency, 'next' or 'previous'.
+	 *
+	 * @since 2.6.0
+	 * @since 4.2.0 Added the `$adjacent` parameter.
+	 *
+	 * @param string  $output   The adjacent post link.
+	 * @param string  $format   Link anchor format.
+	 * @param string  $link     Link permalink format.
+	 * @param WP_Post $post     The adjacent post.
+	 * @param string  $adjacent Whether the post is previous or next.
+	 */
+	return apply_filters( "{$adjacent}_post_link", $output, $format, $link, $post, $adjacent );
 }
 /**
 * Display adjacent post link.
 *
 * Can be either next post link or previous.
 *
 * @since 2.5.0
-* @uses get_adjacent_post_link()
+*
-*
+* @param string       $format         Link anchor format.
-* @param string $format Link anchor format.
+* @param string       $link           Link permalink format.
-* @param string $link Link permalink format.
+* @param bool         $in_same_term   Optional. Whether link should be in a same taxonomy term.
-* @param bool $in_same_cat Optional. Whether link should be in a same category.
+* @param array|string $excluded_terms Optional. Array or comma-separated list of excluded category IDs.
-* @param array|string $excluded_categories Optional. Array or comma-separated list of excluded category IDs.
+* @param bool         $previous       Optional. Whether to display link to previous or next post. Default true.
-* @param bool $previous Optional, default is true. Whether to display link to previous or next post.
+* @param string       $taxonomy       Optional. Taxonomy, if $in_same_term is true. Default 'category'.
-* @return string
+*/
-*/
+function adjacent_post_link( $format, $link, $in_same_term = false, $excluded_terms = '', $previous = true, $taxonomy = 'category' ) {
-function adjacent_post_link( $format, $link, $in_same_cat = false, $excluded_categories = '', $previous = true ) {
+	echo get_adjacent_post_link( $format, $link, $in_same_term, $excluded_terms, $previous, $taxonomy );
-	echo get_adjacent_post_link( $format, $link, $in_same_cat, $excluded_categories, $previous );
 }
 /**
 * Retrieve links for page numbers.
 *
 * @since 1.5.0
 *
 * @param int $pagenum Optional. Page ID.
 * @param bool $escape Optional. Whether to escape the URL for display, with esc_url(). Defaults to true.
 * 	Otherwise, prepares the URL with esc_url_raw().
-* @return string
+* @return string The link URL for the given page number.
 */
 function get_pagenum_link($pagenum = 1, $escape = true ) {
 	global $wp_rewrite;
 	$pagenum = (int) $pagenum;
 		}
 		$result = $base . $request . $query_string;
 	}
-	$result = apply_filters('get_pagenum_link', $result);
+	/**
+	 * Filter the page number link for the current request.
+	 *
+	 * @since 2.5.0
+	 *
+	 * @param string $result The page number link.
+	 */
+	$result = apply_filters( 'get_pagenum_link', $result );
 	if ( $escape )
 		return esc_url( $result );
 	else
 		return esc_url_raw( $result );
 * Backported from 2.1.3 to 2.0.10.
 *
 * @since 2.0.10
 *
 * @param int $max_page Optional. Max pages.
-* @return string
+* @return string The link URL for next posts page.
 */
 function get_next_posts_page_link($max_page = 0) {
 	global $paged;
 	if ( !is_single() ) {
 *
 * @since 0.71
 *
 * @param int $max_page Optional. Max pages.
 * @param boolean $echo Optional. Echo or return;
+* @return string The link URL for next posts page if `$echo = false`.
 */
 function next_posts( $max_page = 0, $echo = true ) {
 	$output = esc_url( get_next_posts_page_link( $max_page ) );
 	if ( $echo )
 *
 * @since 2.7.0
 *
 * @param string $label Content for link text.
 * @param int $max_page Optional. Max pages.
-* @return string|null
+* @return string|null HTML-formatted next posts page link.
 */
 function get_next_posts_link( $label = null, $max_page = 0 ) {
 	global $paged, $wp_query;
 	if ( !$max_page )
 	if ( null === $label )
 		$label = __( 'Next Page &raquo;' );
 	if ( !is_single() && ( $nextpage <= $max_page ) ) {
+		/**
+		 * Filter the anchor tag attributes for the next posts page link.
+		 *
+		 * @since 2.7.0
+		 *
+		 * @param string $attributes Attributes for the anchor tag.
+		 */
 		$attr = apply_filters( 'next_posts_link_attributes', '' );
 		return '<a href="' . next_posts( $max_page, false ) . "\" $attr>" . preg_replace('/&([^#])(?![a-z]{1,8};)/i', '&#038;$1', $label) . '</a>';
 	}
 }
 /**
 * Display the next posts page link.
 *
 * @since 0.71
-* @uses get_next_posts_link()
 *
 * @param string $label Content for link text.
 * @param int $max_page Optional. Max pages.
 */
 function next_posts_link( $label = null, $max_page = 0 ) {
 *
 * Backported to 2.0.10 from 2.1.3.
 *
 * @since 2.0.10
 *
-* @return string|null
+* @return string|null The link for the previous posts page.
 */
 function get_previous_posts_page_link() {
 	global $paged;
 	if ( !is_single() ) {
 * Display or return the previous posts page link.
 *
 * @since 0.71
 *
 * @param boolean $echo Optional. Echo or return;
+* @return string The previous posts page link if `$echo = false`.
 */
 function previous_posts( $echo = true ) {
 	$output = esc_url( get_previous_posts_page_link() );
 	if ( $echo )
 * Return the previous posts page link.
 *
 * @since 2.7.0
 *
 * @param string $label Optional. Previous page link text.
-* @return string|null
+* @return string|null HTML-formatted previous page link.
 */
 function get_previous_posts_link( $label = null ) {
 	global $paged;
 	if ( null === $label )
 		$label = __( '&laquo; Previous Page' );
 	if ( !is_single() && $paged > 1 ) {
+		/**
+		 * Filter the anchor tag attributes for the previous posts page link.
+		 *
+		 * @since 2.7.0
+		 *
+		 * @param string $attributes Attributes for the anchor tag.
+		 */
 		$attr = apply_filters( 'previous_posts_link_attributes', '' );
 		return '<a href="' . previous_posts( false ) . "\" $attr>". preg_replace( '/&([^#])(?![a-z]{1,8};)/i', '&#038;$1', $label ) .'</a>';
 	}
 }
 /**
 * Display the previous posts page link.
 *
 * @since 0.71
-* @uses get_previous_posts_link()
 *
 * @param string $label Optional. Previous page link text.
 */
 function previous_posts_link( $label = null ) {
 	echo get_previous_posts_link( $label );
 }
 /**
 * Return post pages link navigation for previous and next pages.
 *
-* @since 2.8
+* @since 2.8.0
 *
 * @param string|array $args Optional args.
 * @return string The posts link navigation.
 */
 function get_posts_nav_link( $args = array() ) {
 	$args = array_filter( compact('sep', 'prelabel', 'nxtlabel') );
 	echo get_posts_nav_link($args);
 }
 /**
+* Return navigation to next/previous post when applicable.
+*
+* @since 4.1.0
+*
+* @param array $args {
+*     Optional. Default post navigation arguments. Default empty array.
+*
+*     @type string $prev_text          Anchor text to display in the previous post link. Default `%title`.
+*     @type string $next_text          Anchor text to display in the next post link. Default `%title`.
+*     @type string $screen_reader_text Screen reader text for nav element. Default 'Post navigation'.
+* }
+* @return string Markup for post links.
+*/
+function get_the_post_navigation( $args = array() ) {
+	$args = wp_parse_args( $args, array(
+		'prev_text'          => '%title',
+		'next_text'          => '%title',
+		'screen_reader_text' => __( 'Post navigation' ),
+	) );
+	$navigation = '';
+	$previous   = get_previous_post_link( '<div class="nav-previous">%link</div>', $args['prev_text'] );
+	$next       = get_next_post_link( '<div class="nav-next">%link</div>', $args['next_text'] );
+	// Only add markup if there's somewhere to navigate to.
+	if ( $previous || $next ) {
+		$navigation = _navigation_markup( $previous . $next, 'post-navigation', $args['screen_reader_text'] );
+	}
+	return $navigation;
+}
+/**
+* Display navigation to next/previous post when applicable.
+*
+* @since 4.1.0
+*
+* @param array $args Optional. See {@see get_the_post_navigation()} for available
+*                    arguments. Default empty array.
+*/
+function the_post_navigation( $args = array() ) {
+	echo get_the_post_navigation( $args );
+}
+/**
+* Return navigation to next/previous set of posts when applicable.
+*
+* @since 4.1.0
+*
+* @global WP_Query $wp_query WordPress Query object.
+*
+* @param array $args {
+*     Optional. Default posts navigation arguments. Default empty array.
+*
+*     @type string $prev_text          Anchor text to display in the previous posts link.
+*                                      Default 'Older posts'.
+*     @type string $next_text          Anchor text to display in the next posts link.
+*                                      Default 'Newer posts'.
+*     @type string $screen_reader_text Screen reader text for nav element.
+*                                      Default 'Posts navigation'.
+* }
+* @return string Markup for posts links.
+*/
+function get_the_posts_navigation( $args = array() ) {
+	$navigation = '';
+	// Don't print empty markup if there's only one page.
+	if ( $GLOBALS['wp_query']->max_num_pages > 1 ) {
+		$args = wp_parse_args( $args, array(
+			'prev_text'          => __( 'Older posts' ),
+			'next_text'          => __( 'Newer posts' ),
+			'screen_reader_text' => __( 'Posts navigation' ),
+		) );
+		$next_link = get_previous_posts_link( $args['next_text'] );
+		$prev_link = get_next_posts_link( $args['prev_text'] );
+		if ( $prev_link ) {
+			$navigation .= '<div class="nav-previous">' . $prev_link . '</div>';
+		}
+		if ( $next_link ) {
+			$navigation .= '<div class="nav-next">' . $next_link . '</div>';
+		}
+		$navigation = _navigation_markup( $navigation, 'posts-navigation', $args['screen_reader_text'] );
+	}
+	return $navigation;
+}
+/**
+* Display navigation to next/previous set of posts when applicable.
+*
+* @since 4.1.0
+*
+* @param array $args Optional. See {@see get_the_posts_navigation()} for available
+*                    arguments. Default empty array.
+*/
+function the_posts_navigation( $args = array() ) {
+	echo get_the_posts_navigation( $args );
+}
+/**
+* Return a paginated navigation to next/previous set of posts,
+* when applicable.
+*
+* @since 4.1.0
+*
+* @param array $args {
+*     Optional. Default pagination arguments, {@see paginate_links()}.
+*
+*     @type string $screen_reader_text Screen reader text for navigation element.
+*                                      Default 'Posts navigation'.
+* }
+* @return string Markup for pagination links.
+*/
+function get_the_posts_pagination( $args = array() ) {
+	$navigation = '';
+	// Don't print empty markup if there's only one page.
+	if ( $GLOBALS['wp_query']->max_num_pages > 1 ) {
+		$args = wp_parse_args( $args, array(
+			'mid_size'           => 1,
+			'prev_text'          => _x( 'Previous', 'previous post' ),
+			'next_text'          => _x( 'Next', 'next post' ),
+			'screen_reader_text' => __( 'Posts navigation' ),
+		) );
+		// Make sure we get a string back. Plain is the next best thing.
+		if ( isset( $args['type'] ) && 'array' == $args['type'] ) {
+			$args['type'] = 'plain';
+		}
+		// Set up paginated links.
+		$links = paginate_links( $args );
+		if ( $links ) {
+			$navigation = _navigation_markup( $links, 'pagination', $args['screen_reader_text'] );
+		}
+	}
+	return $navigation;
+}
+/**
+* Display a paginated navigation to next/previous set of posts,
+* when applicable.
+*
+* @since 4.1.0
+*
+* @param array $args Optional. See {@see get_the_posts_pagination()} for available arguments.
+*                    Default empty array.
+*/
+function the_posts_pagination( $args = array() ) {
+	echo get_the_posts_pagination( $args );
+}
+/**
+* Wraps passed links in navigational markup.
+*
+* @since 4.1.0
+* @access private
+*
+* @param string $links              Navigational links.
+* @param string $class              Optional. Custom class for nav element. Default: 'posts-navigation'.
+* @param string $screen_reader_text Optional. Screen reader text for nav element. Default: 'Posts navigation'.
+* @return string Navigation template tag.
+*/
+function _navigation_markup( $links, $class = 'posts-navigation', $screen_reader_text = '' ) {
+	if ( empty( $screen_reader_text ) ) {
+		$screen_reader_text = __( 'Posts navigation' );
+	}
+	$template = '
+	<nav class="navigation %1$s" role="navigation">
+		<h2 class="screen-reader-text">%2$s</h2>
+		<div class="nav-links">%3$s</div>
+	</nav>';
+	return sprintf( $template, sanitize_html_class( $class ), esc_html( $screen_reader_text ), $links );
+}
+/**
 * Retrieve comments page number link.
 *
 * @since 2.7.0
 *
 * @param int $pagenum Optional. Page number.
-* @return string
+* @param int $max_page Optional. The maximum number of comment pages.
+* @return string The comments page number link URL.
 */
 function get_comments_pagenum_link( $pagenum = 1, $max_page = 0 ) {
 	global $wp_rewrite;
 	$pagenum = (int) $pagenum;
 	$result = get_permalink();
 	if ( 'newest' == get_option('default_comments_page') ) {
 		if ( $pagenum != $max_page ) {
 			if ( $wp_rewrite->using_permalinks() )
-				$result = user_trailingslashit( trailingslashit($result) . 'comment-page-' . $pagenum, 'commentpaged');
+				$result = user_trailingslashit( trailingslashit($result) . $wp_rewrite->comments_pagination_base . '-' . $pagenum, 'commentpaged');
 			else
 				$result = add_query_arg( 'cpage', $pagenum, $result );
 		}
 	} elseif ( $pagenum > 1 ) {
 		if ( $wp_rewrite->using_permalinks() )
-			$result = user_trailingslashit( trailingslashit($result) . 'comment-page-' . $pagenum, 'commentpaged');
+			$result = user_trailingslashit( trailingslashit($result) . $wp_rewrite->comments_pagination_base . '-' . $pagenum, 'commentpaged');
 		else
 			$result = add_query_arg( 'cpage', $pagenum, $result );
 	}
 	$result .= '#comments';
-	$result = apply_filters('get_comments_pagenum_link', $result);
+	/**
+	 * Filter the comments page number link for the current request.
+	 *
+	 * @since 2.7.0
+	 *
+	 * @param string $result The comments page number link.
+	 */
+	$result = apply_filters( 'get_comments_pagenum_link', $result );
 	return $result;
 }
 /**
 *
 * @since 2.7.1
 *
 * @param string $label Optional. Label for link text.
 * @param int $max_page Optional. Max page.
-* @return string|null
+* @return string|null HTML-formatted link for the next page of comments.
 */
 function get_next_comments_link( $label = '', $max_page = 0 ) {
 	global $wp_query;
 	if ( !is_singular() || !get_option('page_comments') )
 		return;
 	$page = get_query_var('cpage');
+	if ( ! $page ) {
+		$page = 1;
+	}
 	$nextpage = intval($page) + 1;
 	if ( empty($max_page) )
 		$max_page = $wp_query->max_num_comment_pages;
 		return;
 	if ( empty($label) )
 		$label = __('Newer Comments &raquo;');
+	/**
+	 * Filter the anchor tag attributes for the next comments page link.
+	 *
+	 * @since 2.7.0
+	 *
+	 * @param string $attributes Attributes for the anchor tag.
+	 */
 	return '<a href="' . esc_url( get_comments_pagenum_link( $nextpage, $max_page ) ) . '" ' . apply_filters( 'next_comments_link_attributes', '' ) . '>'. preg_replace('/&([^#])(?![a-z]{1,8};)/i', '&#038;$1', $label) .'</a>';
 }
 /**
 * Display the link to next comments page.
 * Return the previous comments page link.
 *
 * @since 2.7.1
 *
 * @param string $label Optional. Label for comments link text.
-* @return string|null
+* @return string|null HTML-formatted link for the previous page of comments.
 */
 function get_previous_comments_link( $label = '' ) {
 	if ( !is_singular() || !get_option('page_comments') )
 		return;
 	$prevpage = intval($page) - 1;
 	if ( empty($label) )
 		$label = __('&laquo; Older Comments');
+	/**
+	 * Filter the anchor tag attributes for the previous comments page link.
+	 *
+	 * @since 2.7.0
+	 *
+	 * @param string $attributes Attributes for the anchor tag.
+	 */
 	return '<a href="' . esc_url( get_comments_pagenum_link( $prevpage ) ) . '" ' . apply_filters( 'previous_comments_link_attributes', '' ) . '>' . preg_replace('/&([^#])(?![a-z]{1,8};)/i', '&#038;$1', $label) .'</a>';
 }
 /**
 * Display the previous comments page link.
 		'current' => $page,
 		'echo' => true,
 		'add_fragment' => '#comments'
 	);
 	if ( $wp_rewrite->using_permalinks() )
-		$defaults['base'] = user_trailingslashit(trailingslashit(get_permalink()) . 'comment-page-%#%', 'commentpaged');
+		$defaults['base'] = user_trailingslashit(trailingslashit(get_permalink()) . $wp_rewrite->comments_pagination_base . '-%#%', 'commentpaged');
 	$args = wp_parse_args( $args, $defaults );
 	$page_links = paginate_links( $args );
 	if ( $args['echo'] )
 *
 * Use this in 'a' element 'href' attribute.
 *
 * @since 2.6.0
 *
-* @return string
+* @return string The Press This bookmarklet link URL.
 */
 function get_shortcut_link() {
-	// In case of breaking changes, version this. #WP20071
+	global $is_IE, $wp_version;
-	$link = "javascript:
-			var d=document,
+	include_once( ABSPATH . 'wp-admin/includes/class-wp-press-this.php' );
-			w=window,
+	$bookmarklet_version = $GLOBALS['wp_press_this']->version;
-			e=w.getSelection,
+	$link = '';
-			k=d.getSelection,
-			x=d.selection,
+	if ( $is_IE ) {
-			s=(e?e():(k)?k():(x?x.createRange().text:0)),
+		/**
-			f='" . admin_url('press-this.php') . "',
+		 * Return the old/shorter bookmarklet code for MSIE 8 and lower,
-			l=d.location,
+		 * since they only support a max length of ~2000 characters for
-			e=encodeURIComponent,
+		 * bookmark[let] URLs, which is way to small for our smarter one.
-			u=f+'?u='+e(l.href)+'&t='+e(d.title)+'&s='+e(s)+'&v=4';
+		 * Do update the version number so users do not get the "upgrade your
-			a=function(){if(!w.open(u,'t','toolbar=0,resizable=1,scrollbars=1,status=1,width=720,height=570'))l.href=u;};
+		 * bookmarklet" notice when using PT in those browsers.
-			if (/Firefox/.test(navigator.userAgent)) setTimeout(a, 0); else a();
+		 */
-			void(0)";
+		$ua = $_SERVER['HTTP_USER_AGENT'];
-	$link = str_replace(array("\r", "\n", "\t"),  '', $link);
+		if ( ! empty( $ua ) && preg_match( '/\bMSIE (\d)/', $ua, $matches ) && (int) $matches[1] <= 8 ) {
+			$url = wp_json_encode( admin_url( 'press-this.php' ) );
-	return apply_filters('shortcut_link', $link);
+			$link = 'javascript:var d=document,w=window,e=w.getSelection,k=d.getSelection,x=d.selection,' .
+				's=(e?e():(k)?k():(x?x.createRange().text:0)),f=' . $url . ',l=d.location,e=encodeURIComponent,' .
+				'u=f+"?u="+e(l.href)+"&t="+e(d.title)+"&s="+e(s)+"&v=' . $bookmarklet_version . '";' .
+				'a=function(){if(!w.open(u,"t","toolbar=0,resizable=1,scrollbars=1,status=1,width=600,height=700"))l.href=u;};' .
+				'if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else a();void(0)';
+		}
+	}
+	if ( empty( $link ) ) {
+		$src = @file_get_contents( ABSPATH . 'wp-admin/js/bookmarklet.min.js' );
+		if ( $src ) {
+			$url = wp_json_encode( admin_url( 'press-this.php' ) . '?v=' . $bookmarklet_version );
+			$link = 'javascript:' . str_replace( 'window.pt_url', $url, $src );
+		}
+	}
+	$link = str_replace( array( "\r", "\n", "\t" ),  '', $link );
+	/**
+	 * Filter the Press This bookmarklet link.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @param string $link The Press This bookmarklet link.
+	 */
+	return apply_filters( 'shortcut_link', $link );
 }
 /**
 * Retrieve the home url for the current site.
 *
 * Returns the 'home' option with the appropriate protocol, 'https' if
-* is_ssl() and 'http' otherwise. If $scheme is 'http' or 'https', is_ssl() is
+* {@see is_ssl()} and 'http' otherwise. If `$scheme` is 'http' or 'https',
-* overridden.
+* `is_ssl()` is overridden.
 *
-* @package WordPress
 * @since 3.0.0
 *
-* @uses get_home_url()
+* @param  string $path   Optional. Path relative to the home url. Default empty.
-*
+* @param  string $scheme Optional. Scheme to give the home url context. Accepts
-* @param  string $path   (optional) Path relative to the home url.
+*                        'http', 'https', or 'relative'. Default null.
-* @param  string $scheme (optional) Scheme to give the home url context. Currently 'http', 'https', or 'relative'.
 * @return string Home url link with optional path appended.
 */
 function home_url( $path = '', $scheme = null ) {
 	return get_home_url( null, $path, $scheme );
 }
 /**
 * Retrieve the home url for a given site.
 *
 * Returns the 'home' option with the appropriate protocol, 'https' if
-* is_ssl() and 'http' otherwise. If $scheme is 'http' or 'https', is_ssl() is
+* {@see is_ssl()} and 'http' otherwise. If `$scheme` is 'http' or 'https',
+* `is_ssl()` is
 * overridden.
 *
-* @package WordPress
 * @since 3.0.0
 *
-* @param  int $blog_id   (optional) Blog ID. Defaults to current blog.
+* @param  int         $blog_id     Optional. Blog ID. Default null (current blog).
-* @param  string $path   (optional) Path relative to the home url.
+* @param  string      $path        Optional. Path relative to the home URL. Default empty.
-* @param  string $scheme (optional) Scheme to give the home url context. Currently 'http', 'https', or 'relative'.
+* @param  string|null $orig_scheme Optional. Scheme to give the home URL context. Accepts
-* @return string Home url link with optional path appended.
+*                                  'http', 'https', 'relative', or null. Default null.
+* @return string Home URL link with optional path appended.
 */
 function get_home_url( $blog_id = null, $path = '', $scheme = null ) {
 	$orig_scheme = $scheme;
 	if ( empty( $blog_id ) || !is_multisite() ) {
 	$url = set_url_scheme( $url, $scheme );
 	if ( $path && is_string( $path ) )
 		$url .= '/' . ltrim( $path, '/' );
+	/**
+	 * Filter the home URL.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string      $url         The complete home URL including scheme and path.
+	 * @param string      $path        Path relative to the home URL. Blank string if no path is specified.
+	 * @param string|null $orig_scheme Scheme to give the home URL context. Accepts 'http', 'https', 'relative' or null.
+	 * @param int|null    $blog_id     Blog ID, or null for the current blog.
+	 */
 	return apply_filters( 'home_url', $url, $path, $orig_scheme, $blog_id );
 }
 /**
 * Retrieve the site url for the current site.
 *
 * Returns the 'site_url' option with the appropriate protocol, 'https' if
 * is_ssl() and 'http' otherwise. If $scheme is 'http' or 'https', is_ssl() is
 * overridden.
 *
-* @package WordPress
+* @since 3.0.0
-* @since 2.6.0
-*
-* @uses get_site_url()
 *
 * @param string $path Optional. Path relative to the site url.
 * @param string $scheme Optional. Scheme to give the site url context. See set_url_scheme().
 * @return string Site url link with optional path appended.
 */
 /**
 * Retrieve the site url for a given site.
 *
 * Returns the 'site_url' option with the appropriate protocol, 'https' if
-* is_ssl() and 'http' otherwise. If $scheme is 'http' or 'https', is_ssl() is
+* {@see is_ssl()} and 'http' otherwise. If `$scheme` is 'http' or 'https',
-* overridden.
+* `is_ssl()` is overridden.
 *
-* @package WordPress
 * @since 3.0.0
 *
-* @param int $blog_id (optional) Blog ID. Defaults to current blog.
+* @param int    $blog_id Optional. Blog ID. Default null (current site).
-* @param string $path Optional. Path relative to the site url.
+* @param string $path    Optional. Path relative to the site url. Default empty.
-* @param string $scheme Optional. Scheme to give the site url context. Currently 'http', 'https', 'login', 'login_post', 'admin', or 'relative'.
+* @param string $scheme  Optional. Scheme to give the site url context. Accepts
+*                        'http', 'https', 'login', 'login_post', 'admin', or
+*                        'relative'. Default null.
 * @return string Site url link with optional path appended.
 */
 function get_site_url( $blog_id = null, $path = '', $scheme = null ) {
 	if ( empty( $blog_id ) || !is_multisite() ) {
 		$url = get_option( 'siteurl' );
 	$url = set_url_scheme( $url, $scheme );
 	if ( $path && is_string( $path ) )
 		$url .= '/' . ltrim( $path, '/' );
+	/**
+	 * Filter the site URL.
+	 *
+	 * @since 2.7.0
+	 *
+	 * @param string      $url     The complete site URL including scheme and path.
+	 * @param string      $path    Path relative to the site URL. Blank string if no path is specified.
+	 * @param string|null $scheme  Scheme to give the site URL context. Accepts 'http', 'https', 'login',
+	 *                             'login_post', 'admin', 'relative' or null.
+	 * @param int|null    $blog_id Blog ID, or null for the current blog.
+	 */
 	return apply_filters( 'site_url', $url, $path, $scheme, $blog_id );
 }
 /**
 * Retrieve the url to the admin area for the current site.
 *
-* @package WordPress
 * @since 2.6.0
 *
 * @param string $path Optional path relative to the admin url.
 * @param string $scheme The scheme to use. Default is 'admin', which obeys force_ssl_admin() and is_ssl(). 'http' or 'https' can be passed to force those schemes.
 * @return string Admin url link with optional path appended.
 function admin_url( $path = '', $scheme = 'admin' ) {
 	return get_admin_url( null, $path, $scheme );
 }
 /**
-* Retrieve the url to the admin area for a given site.
+* Retrieves the url to the admin area for a given site.
 *
-* @package WordPress
 * @since 3.0.0
 *
-* @param int $blog_id (optional) Blog ID. Defaults to current blog.
+* @param int    $blog_id Optional. Blog ID. Default null (current site).
-* @param string $path Optional path relative to the admin url.
+* @param string $path    Optional. Path relative to the admin url. Default empty.
-* @param string $scheme The scheme to use. Default is 'admin', which obeys force_ssl_admin() and is_ssl(). 'http' or 'https' can be passed to force those schemes.
+* @param string $scheme  Optional. The scheme to use. Accepts 'http' or 'https',
+*                        to force those schemes. Default 'admin', which obeys
+*                        {@see force_ssl_admin()} and {@see is_ssl()}.
 * @return string Admin url link with optional path appended.
 */
 function get_admin_url( $blog_id = null, $path = '', $scheme = 'admin' ) {
 	$url = get_site_url($blog_id, 'wp-admin/', $scheme);
 	if ( $path && is_string( $path ) )
 		$url .= ltrim( $path, '/' );
+	/**
+	 * Filter the admin area URL.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param string   $url     The complete admin area URL including scheme and path.
+	 * @param string   $path    Path relative to the admin area URL. Blank string if no path is specified.
+	 * @param int|null $blog_id Blog ID, or null for the current blog.
+	 */
 	return apply_filters( 'admin_url', $url, $path, $blog_id );
 }
 /**
 * Retrieve the url to the includes directory.
 *
-* @package WordPress
 * @since 2.6.0
 *
 * @param string $path Optional. Path relative to the includes url.
 * @param string $scheme Optional. Scheme to give the includes url context.
 * @return string Includes url link with optional path appended.
 	$url = site_url( '/' . WPINC . '/', $scheme );
 	if ( $path && is_string( $path ) )
 		$url .= ltrim($path, '/');
-	return apply_filters('includes_url', $url, $path);
+	/**
+	 * Filter the URL to the includes directory.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param string $url  The complete URL to the includes directory including scheme and path.
+	 * @param string $path Path relative to the URL to the wp-includes directory. Blank string
+	 *                     if no path is specified.
+	 */
+	return apply_filters( 'includes_url', $url, $path );
 }
 /**
 * Retrieve the url to the content directory.
 *
-* @package WordPress
 * @since 2.6.0
 *
 * @param string $path Optional. Path relative to the content url.
 * @return string Content url link with optional path appended.
 */
 	$url = set_url_scheme( WP_CONTENT_URL );
 	if ( $path && is_string( $path ) )
 		$url .= '/' . ltrim($path, '/');
-	return apply_filters('content_url', $url, $path);
+	/**
-}
+	 * Filter the URL to the content directory.
+	 *
-/**
+	 * @since 2.8.0
-* Retrieve the url to the plugins directory or to a specific file within that directory.
+	 *
-* You can hardcode the plugin slug in $path or pass __FILE__ as a second argument to get the correct folder name.
+	 * @param string $url  The complete URL to the content directory including scheme and path.
-*
+	 * @param string $path Path relative to the URL to the content directory. Blank string
-* @package WordPress
+	 *                     if no path is specified.
+	 */
+	return apply_filters( 'content_url', $url, $path);
+}
+/**
+* Retrieve a URL within the plugins or mu-plugins directory.
+*
+* Defaults to the plugins directory URL if no arguments are supplied.
+*
 * @since 2.6.0
 *
-* @param string $path Optional. Path relative to the plugins url.
+* @param  string $path   Optional. Extra path appended to the end of the URL, including
-* @param string $plugin Optional. The plugin file that you want to be relative to - i.e. pass in __FILE__
+*                        the relative directory if $plugin is supplied. Default empty.
-* @return string Plugins url link with optional path appended.
+* @param  string $plugin Optional. A full path to a file inside a plugin or mu-plugin.
+*                        The URL will be relative to its directory. Default empty.
+*                        Typically this is done by passing `__FILE__` as the argument.
+* @return string Plugins URL link with optional paths appended.
 */
-function plugins_url($path = '', $plugin = '') {
+function plugins_url( $path = '', $plugin = '' ) {
-	$mu_plugin_dir = WPMU_PLUGIN_DIR;
+	$path = wp_normalize_path( $path );
-	foreach ( array('path', 'plugin', 'mu_plugin_dir') as $var ) {
+	$plugin = wp_normalize_path( $plugin );
-		$$var = str_replace('\\' ,'/', $$var); // sanitize for Win32 installs
+	$mu_plugin_dir = wp_normalize_path( WPMU_PLUGIN_DIR );
-		$$var = preg_replace('|/+|', '/', $$var);
-	}
 	if ( !empty($plugin) && 0 === strpos($plugin, $mu_plugin_dir) )
 		$url = WPMU_PLUGIN_URL;
 	else
 		$url = WP_PLUGIN_URL;
 	}
 	if ( $path && is_string( $path ) )
 		$url .= '/' . ltrim($path, '/');
-	return apply_filters('plugins_url', $url, $path, $plugin);
+	/**
+	 * Filter the URL to the plugins directory.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param string $url    The complete URL to the plugins directory including scheme and path.
+	 * @param string $path   Path relative to the URL to the plugins directory. Blank string
+	 *                       if no path is specified.
+	 * @param string $plugin The plugin file path to be relative to. Blank string if no plugin
+	 *                       is specified.
+	 */
+	return apply_filters( 'plugins_url', $url, $path, $plugin );
 }
 /**
 * Retrieve the site url for the current network.
 *
 * Returns the site url with the appropriate protocol, 'https' if
 * is_ssl() and 'http' otherwise. If $scheme is 'http' or 'https', is_ssl() is
 * overridden.
 *
-* @package WordPress
 * @since 3.0.0
 *
 * @param string $path Optional. Path relative to the site url.
 * @param string $scheme Optional. Scheme to give the site url context. See set_url_scheme().
 * @return string Site url link with optional path appended.
 */
 function network_site_url( $path = '', $scheme = null ) {
-	global $current_site;
 	if ( ! is_multisite() )
 		return site_url($path, $scheme);
+	$current_site = get_current_site();
 	if ( 'relative' == $scheme )
 		$url = $current_site->path;
 	else
 		$url = set_url_scheme( 'http://' . $current_site->domain . $current_site->path, $scheme );
 	if ( $path && is_string( $path ) )
 		$url .= ltrim( $path, '/' );
+	/**
+	 * Filter the network site URL.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string      $url    The complete network site URL including scheme and path.
+	 * @param string      $path   Path relative to the network site URL. Blank string if
+	 *                            no path is specified.
+	 * @param string|null $scheme Scheme to give the URL context. Accepts 'http', 'https',
+	 *                            'relative' or null.
+	 */
 	return apply_filters( 'network_site_url', $url, $path, $scheme );
 }
 /**
-* Retrieve the home url for the current network.
+* Retrieves the home url for the current network.
 *
-* Returns the home url with the appropriate protocol, 'https' if
+* Returns the home url with the appropriate protocol, 'https' {@see is_ssl()}
-* is_ssl() and 'http' otherwise. If $scheme is 'http' or 'https', is_ssl() is
+* and 'http' otherwise. If `$scheme` is 'http' or 'https', `is_ssl()` is
 * overridden.
 *
-* @package WordPress
 * @since 3.0.0
 *
-* @param  string $path   (optional) Path relative to the home url.
+* @param  string $path   Optional. Path relative to the home url. Default empty.
-* @param  string $scheme (optional) Scheme to give the home url context. Currently 'http', 'https', or 'relative'.
+* @param  string $scheme Optional. Scheme to give the home url context. Accepts
+*                        'http', 'https', or 'relative'. Default null.
 * @return string Home url link with optional path appended.
 */
 function network_home_url( $path = '', $scheme = null ) {
-	global $current_site;
 	if ( ! is_multisite() )
 		return home_url($path, $scheme);
+	$current_site = get_current_site();
 	$orig_scheme = $scheme;
 	if ( ! in_array( $scheme, array( 'http', 'https', 'relative' ) ) )
 		$scheme = is_ssl() && ! is_admin() ? 'https' : 'http';
 		$url = set_url_scheme( 'http://' . $current_site->domain . $current_site->path, $scheme );
 	if ( $path && is_string( $path ) )
 		$url .= ltrim( $path, '/' );
+	/**
+	 * Filter the network home URL.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string      $url         The complete network home URL including scheme and path.
+	 * @param string      $path        Path relative to the network home URL. Blank string
+	 *                                 if no path is specified.
+	 * @param string|null $orig_scheme Scheme to give the URL context. Accepts 'http', 'https',
+	 *                                 'relative' or null.
+	 */
 	return apply_filters( 'network_home_url', $url, $path, $orig_scheme);
 }
 /**
 * Retrieve the url to the admin area for the network.
 *
-* @package WordPress
 * @since 3.0.0
 *
 * @param string $path Optional path relative to the admin url.
 * @param string $scheme The scheme to use. Default is 'admin', which obeys force_ssl_admin() and is_ssl(). 'http' or 'https' can be passed to force those schemes.
 * @return string Admin url link with optional path appended.
 	$url = network_site_url('wp-admin/network/', $scheme);
 	if ( $path && is_string( $path ) )
 		$url .= ltrim($path, '/');
-	return apply_filters('network_admin_url', $url, $path);
+	/**
+	 * Filter the network admin URL.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string $url  The complete network admin URL including scheme and path.
+	 * @param string $path Path relative to the network admin URL. Blank string if
+	 *                     no path is specified.
+	 */
+	return apply_filters( 'network_admin_url', $url, $path );
 }
 /**
 * Retrieve the url to the admin area for the current user.
 *
-* @package WordPress
 * @since 3.0.0
 *
 * @param string $path Optional path relative to the admin url.
 * @param string $scheme The scheme to use. Default is 'admin', which obeys force_ssl_admin() and is_ssl(). 'http' or 'https' can be passed to force those schemes.
 * @return string Admin url link with optional path appended.
 	$url = network_site_url('wp-admin/user/', $scheme);
 	if ( $path && is_string( $path ) )
 		$url .= ltrim($path, '/');
-	return apply_filters('user_admin_url', $url, $path);
+	/**
+	 * Filter the user admin URL for the current user.
+	 *
+	 * @since 3.1.0
+	 *
+	 * @param string $url  The complete URL including scheme and path.
+	 * @param string $path Path relative to the URL. Blank string if
+	 *                     no path is specified.
+	 */
+	return apply_filters( 'user_admin_url', $url, $path );
 }
 /**
 * Retrieve the url to the admin area for either the current blog or the network depending on context.
 *
-* @package WordPress
 * @since 3.1.0
 *
 * @param string $path Optional path relative to the admin url.
 * @param string $scheme The scheme to use. Default is 'admin', which obeys force_ssl_admin() and is_ssl(). 'http' or 'https' can be passed to force those schemes.
 * @return string Admin url link with optional path appended.
 * @param string $scheme Optional. Scheme to give $url. Currently 'http', 'https', 'login', 'login_post', 'admin', or 'relative'.
 * @return string $url URL with chosen scheme.
 */
 function set_url_scheme( $url, $scheme = null ) {
 	$orig_scheme = $scheme;
-	if ( ! in_array( $scheme, array( 'http', 'https', 'relative' ) ) ) {
-		if ( ( 'login_post' == $scheme || 'rpc' == $scheme ) && ( force_ssl_login() || force_ssl_admin() ) )
+	if ( ! $scheme ) {
-			$scheme = 'https';
+		$scheme = is_ssl() ? 'https' : 'http';
-		elseif ( ( 'login' == $scheme ) && force_ssl_admin() )
+	} elseif ( $scheme === 'admin' || $scheme === 'login' || $scheme === 'login_post' || $scheme === 'rpc' ) {
-			$scheme = 'https';
+		$scheme = is_ssl() || force_ssl_admin() ? 'https' : 'http';
-		elseif ( ( 'admin' == $scheme ) && force_ssl_admin() )
+	} elseif ( $scheme !== 'http' && $scheme !== 'https' && $scheme !== 'relative' ) {
-			$scheme = 'https';
+		$scheme = is_ssl() ? 'https' : 'http';
-		else
-			$scheme = ( is_ssl() ? 'https' : 'http' );
 	}
 	$url = trim( $url );
 	if ( substr( $url, 0, 2 ) === '//' )
 		$url = 'http:' . $url;
 			$url = '/' . ltrim($url , "/ \t\n\r\0\x0B" );
 	} else {
 		$url = preg_replace( '#^\w+://#', $scheme . '://', $url );
 	}
+	/**
+	 * Filter the resulting URL after setting the scheme.
+	 *
+	 * @since 3.4.0
+	 *
+	 * @param string $url         The complete URL including scheme and path.
+	 * @param string $scheme      Scheme applied to the URL. One of 'http', 'https', or 'relative'.
+	 * @param string $orig_scheme Scheme requested for the URL. One of 'http', 'https', 'login',
+	 *                            'login_post', 'admin', 'rpc', or 'relative'.
+	 */
 	return apply_filters( 'set_url_scheme', $url, $scheme, $orig_scheme );
 }
 /**
 * Get the URL to the user's dashboard.
 * the dashboard for the current site is returned. If the user cannot edit the current site, the dashboard to the user's
 * primary blog is returned.
 *
 * @since 3.1.0
 *
-* @param int $user_id User ID
+* @param int $user_id Optional. User ID. Defaults to current user.
 * @param string $path Optional path relative to the dashboard. Use only paths known to both blog and user admins.
 * @param string $scheme The scheme to use. Default is 'admin', which obeys force_ssl_admin() and is_ssl(). 'http' or 'https' can be passed to force those schemes.
 * @return string Dashboard url link with optional path appended.
 */
-function get_dashboard_url( $user_id, $path = '', $scheme = 'admin' ) {
+function get_dashboard_url( $user_id = 0, $path = '', $scheme = 'admin' ) {
-	$user_id = (int) $user_id;
+	$user_id = $user_id ? (int) $user_id : get_current_user_id();
 	$blogs = get_blogs_of_user( $user_id );
 	if ( ! is_super_admin() && empty($blogs) ) {
 		$url = user_admin_url( $path, $scheme );
 	} elseif ( ! is_multisite() ) {
 			else
 				$url = user_admin_url( $path, $scheme );
 		}
 	}
+	/**
+	 * Filter the dashboard URL for a user.
+	 *
+	 * @since 3.1.0
+	 *
+	 * @param string $url     The complete URL including scheme and path.
+	 * @param int    $user_id The user ID.
+	 * @param string $path    Path relative to the URL. Blank string if no path is specified.
+	 * @param string $scheme  Scheme to give the URL context. Accepts 'http', 'https', 'login',
+	 *                        'login_post', 'admin', 'relative' or null.
+	 */
 	return apply_filters( 'user_dashboard_url', $url, $user_id, $path, $scheme);
 }
 /**
 * Get the URL to the user's profile editor.
 *
 * @since 3.1.0
 *
-* @param int $user User ID
+* @param int    $user_id Optional. User ID. Defaults to current user.
-* @param string $scheme The scheme to use. Default is 'admin', which obeys force_ssl_admin() and is_ssl(). 'http' or 'https' can be passed to force those schemes.
+* @param string $scheme  The scheme to use. Default is 'admin', which obeys force_ssl_admin() and is_ssl().
+*                        'http' or 'https' can be passed to force those schemes.
 * @return string Dashboard url link with optional path appended.
 */
-function get_edit_profile_url( $user, $scheme = 'admin' ) {
+function get_edit_profile_url( $user_id = 0, $scheme = 'admin' ) {
-	$user = (int) $user;
+	$user_id = $user_id ? (int) $user_id : get_current_user_id();
 	if ( is_user_admin() )
 		$url = user_admin_url( 'profile.php', $scheme );
 	elseif ( is_network_admin() )
 		$url = network_admin_url( 'profile.php', $scheme );
 	else
-		$url = get_dashboard_url( $user, 'profile.php', $scheme );
+		$url = get_dashboard_url( $user_id, 'profile.php', $scheme );
-	return apply_filters( 'edit_profile_url', $url, $user, $scheme);
+	/**
+	 * Filter the URL for a user's profile editor.
+	 *
+	 * @since 3.1.0
+	 *
+	 * @param string $url     The complete URL including scheme and path.
+	 * @param int    $user_id The user ID.
+	 * @param string $scheme  Scheme to give the URL context. Accepts 'http', 'https', 'login',
+	 *                        'login_post', 'admin', 'relative' or null.
+	 */
+	return apply_filters( 'edit_profile_url', $url, $user_id, $scheme);
 }
 /**
 * Output rel=canonical for singular queries.
 *
-* @package WordPress
 * @since 2.9.0
 */
 function rel_canonical() {
 	if ( !is_singular() )
 		return;
 * @param string $context Whether the id is a 'blog' id, 'post' id, or 'media' id. If 'post', the post_type of the post is consulted. If 'query', the current query is consulted to determine the id and context. Default is 'post'.
 * @param bool $allow_slugs Whether to allow post slugs in the shortlink. It is up to the plugin how and whether to honor this.
 * @return string A shortlink or an empty string if no shortlink exists for the requested resource or if shortlinks are not enabled.
 */
 function wp_get_shortlink($id = 0, $context = 'post', $allow_slugs = true) {
-	// Allow plugins to short-circuit this function.
+	/**
-	$shortlink = apply_filters('pre_get_shortlink', false, $id, $context, $allow_slugs);
+	 * Filter whether to preempt generating a shortlink for the given post.
+	 *
+	 * Passing a truthy value to the filter will effectively short-circuit the
+	 * shortlink-generation process, returning that value instead.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param bool|string $return      Short-circuit return value. Either false or a URL string.
+	 * @param int         $id          Post ID, or 0 for the current post.
+	 * @param string      $context     The context for the link. One of 'post' or 'query',
+	 * @param bool        $allow_slugs Whether to allow post slugs in the shortlink.
+	 */
+	$shortlink = apply_filters( 'pre_get_shortlink', false, $id, $context, $allow_slugs );
 	if ( false !== $shortlink )
 		return $shortlink;
 	global $wp_query;
 	$post_id = 0;
 	$shortlink = '';
 	// Return p= link for all public post types.
 	if ( ! empty( $post_id ) ) {
 		$post_type = get_post_type_object( $post->post_type );
-		if ( $post_type->public )
-			$shortlink = home_url('?p=' . $post_id);
+		if ( 'page' === $post->post_type && $post->ID == get_option( 'page_on_front' ) && 'page' == get_option( 'show_on_front' ) ) {
-	}
+			$shortlink = home_url( '/' );
+		} elseif ( $post_type->public ) {
-	return apply_filters('get_shortlink', $shortlink, $id, $context, $allow_slugs);
+			$shortlink = home_url( '?p=' . $post_id );
+		}
+	}
+	/**
+	 * Filter the shortlink for a post.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string $shortlink   Shortlink URL.
+	 * @param int    $id          Post ID, or 0 for the current post.
+	 * @param string $context     The context for the link. One of 'post' or 'query',
+	 * @param bool   $allow_slugs Whether to allow post slugs in the shortlink. Not used by default.
+	 */
+	return apply_filters( 'get_shortlink', $shortlink, $id, $context, $allow_slugs );
 }
 /**
 *  Inject rel=shortlink into head if a shortlink is defined for the current page.
 *
 *  Attached to the wp_head action.
 *
 * @since 3.0.0
-*
-* @uses wp_get_shortlink()
 */
 function wp_shortlink_wp_head() {
 	$shortlink = wp_get_shortlink( 0, 'query' );
 	if ( empty( $shortlink ) )
 * Send a Link: rel=shortlink header if a shortlink is defined for the current page.
 *
 * Attached to the wp action.
 *
 * @since 3.0.0
-*
-* @uses wp_get_shortlink()
 */
 function wp_shortlink_header() {
 	if ( headers_sent() )
 		return;
 	$shortlink = wp_get_shortlink( $post->ID );
 	if ( !empty( $shortlink ) ) {
 		$link = '<a rel="shortlink" href="' . esc_url( $shortlink ) . '" title="' . $title . '">' . $text . '</a>';
+		/**
+		 * Filter the shortlink anchor tag for a post.
+		 *
+		 * @since 3.0.0
+		 *
+		 * @param string $link      Shortlink anchor tag.
+		 * @param string $shortlink Shortlink URL.
+		 * @param string $text      Shortlink's text.
+		 * @param string $title     Shortlink's title attribute.
+		 */
 		$link = apply_filters( 'the_shortlink', $link, $shortlink, $text, $title );
 		echo $before, $link, $after;
 	}
 }
+/**
+* Retrieve the avatar URL.
+*
+* @since 4.2.0
+*
+* @param mixed $id_or_email The Gravatar to retrieve a URL for. Accepts a user_id, gravatar md5 hash,
+*                           user email, WP_User object, WP_Post object, or comment object.
+* @param array $args {
+*     Optional. Arguments to return instead of the default arguments.
+*
+*     @type int    $size           Height and width of the avatar in pixels. Default 96.
+*     @type string $default        URL for the default image or a default type. Accepts '404' (return
+*                                  a 404 instead of a default image), 'retro' (8bit), 'monsterid' (monster),
+*                                  'wavatar' (cartoon face), 'indenticon' (the "quilt"), 'mystery', 'mm',
+*                                  or 'mysterman' (The Oyster Man), 'blank' (transparent GIF), or
+*                                  'gravatar_default' (the Gravatar logo). Default is the value of the
+*                                  'avatar_default' option, with a fallback of 'mystery'.
+*     @type bool   $force_default  Whether to always show the default image, never the Gravatar. Default false.
+*     @type string $rating         What rating to display avatars up to. Accepts 'G', 'PG', 'R', 'X', and are
+*                                  judged in that order. Default is the value of the 'avatar_rating' option.
+*     @type string $scheme         URL scheme to use. See set_url_scheme() for accepted values.
+*                                  Default null.
+*     @type array  $processed_args When the function returns, the value will be the processed/sanitized $args
+*                                  plus a "found_avatar" guess. Pass as a reference. Default null.
+* }
+* @return false|string The URL of the avatar we found, or false if we couldn't find an avatar.
+*/
+function get_avatar_url( $id_or_email, $args = null ) {
+	$args = get_avatar_data( $id_or_email, $args );
+	return $args['url'];
+}
+/**
+* Retrieve default data about the avatar.
+*
+* @since 4.2.0
+*
+* @param mixed $id_or_email The Gravatar to check the data against. Accepts a user_id, gravatar md5 hash,
+*                           user email, WP_User object, WP_Post object, or comment object.
+* @param array $args {
+*     Optional. Arguments to return instead of the default arguments.
+*
+*     @type int    $size           Height and width of the avatar image file in pixels. Default 96.
+*     @type int    $height         Display height of the avatar in pixels. Defaults to $size.
+*     @type int    $width          Display width of the avatar in pixels. Defaults to $size.
+*     @type string $default        URL for the default image or a default type. Accepts '404' (return
+*                                  a 404 instead of a default image), 'retro' (8bit), 'monsterid' (monster),
+*                                  'wavatar' (cartoon face), 'indenticon' (the "quilt"), 'mystery', 'mm',
+*                                  or 'mysterman' (The Oyster Man), 'blank' (transparent GIF), or
+*                                  'gravatar_default' (the Gravatar logo). Default is the value of the
+*                                  'avatar_default' option, with a fallback of 'mystery'.
+*     @type bool   $force_default  Whether to always show the default image, never the Gravatar. Default false.
+*     @type string $rating         What rating to display avatars up to. Accepts 'G', 'PG', 'R', 'X', and are
+*                                  judged in that order. Default is the value of the 'avatar_rating' option.
+*     @type string $scheme         URL scheme to use. See set_url_scheme() for accepted values.
+*                                  Default null.
+*     @type array  $processed_args When the function returns, the value will be the processed/sanitized $args
+*                                  plus a "found_avatar" guess. Pass as a reference. Default null.
+*     @type string $extra_attr     HTML attributes to insert in the IMG element. Is not sanitized. Default empty.
+* }
+* @return array $processed_args {
+*     Along with the arguments passed in `$args`, this will contain a couple of extra arguments.
+*
+*     @type bool   $found_avatar True if we were able to find an avatar for this user,
+*                                false or not set if we couldn't.
+*     @type string $url          The URL of the avatar we found.
+* }
+*/
+function get_avatar_data( $id_or_email, $args = null ) {
+	$args = wp_parse_args( $args, array(
+		'size'           => 96,
+		'height'         => null,
+		'width'          => null,
+		'default'        => get_option( 'avatar_default', 'mystery' ),
+		'force_default'  => false,
+		'rating'         => get_option( 'avatar_rating' ),
+		'scheme'         => null,
+		'processed_args' => null, // if used, should be a reference
+		'extra_attr'     => '',
+	) );
+	if ( is_numeric( $args['size'] ) ) {
+		$args['size'] = absint( $args['size'] );
+		if ( ! $args['size'] ) {
+			$args['size'] = 96;
+		}
+	} else {
+		$args['size'] = 96;
+	}
+	if ( is_numeric( $args['height'] ) ) {
+		$args['height'] = absint( $args['height'] );
+		if ( ! $args['height'] ) {
+			$args['height'] = $args['size'];
+		}
+	} else {
+		$args['height'] = $args['size'];
+	}
+	if ( is_numeric( $args['width'] ) ) {
+		$args['width'] = absint( $args['width'] );
+		if ( ! $args['width'] ) {
+			$args['width'] = $args['size'];
+		}
+	} else {
+		$args['width'] = $args['size'];
+	}
+	if ( empty( $args['default'] ) ) {
+		$args['default'] = get_option( 'avatar_default', 'mystery' );
+	}
+	switch ( $args['default'] ) {
+		case 'mm' :
+		case 'mystery' :
+		case 'mysteryman' :
+			$args['default'] = 'mm';
+			break;
+		case 'gravatar_default' :
+			$args['default'] = false;
+			break;
+	}
+	$args['force_default'] = (bool) $args['force_default'];
+	$args['rating'] = strtolower( $args['rating'] );
+	$args['found_avatar'] = false;
+	/**
+	 * Filter whether to retrieve the avatar URL early.
+	 *
+	 * Passing a non-null value in the 'url' member of the return array will
+	 * effectively short circuit get_avatar_data(), passing the value through
+	 * the {@see 'get_avatar_data'} filter and returning early.
+	 *
+	 * @since 4.2.0
+	 *
+	 * @param array             $args          Arguments passed to get_avatar_data(), after processing.
+	 * @param int|object|string $id_or_email   A user ID, email address, or comment object.
+	 */
+	$args = apply_filters( 'pre_get_avatar_data', $args, $id_or_email );
+	if ( isset( $args['url'] ) && ! is_null( $args['url'] ) ) {
+		/** This filter is documented in wp-includes/link-template.php */
+		return apply_filters( 'get_avatar_data', $args, $id_or_email );
+	}
+	$email_hash = '';
+	$user = $email = false;
+	// Process the user identifier.
+	if ( is_numeric( $id_or_email ) ) {
+		$user = get_user_by( 'id', absint( $id_or_email ) );
+	} elseif ( is_string( $id_or_email ) ) {
+		if ( strpos( $id_or_email, '@md5.gravatar.com' ) ) {
+			// md5 hash
+			list( $email_hash ) = explode( '@', $id_or_email );
+		} else {
+			// email address
+			$email = $id_or_email;
+		}
+	} elseif ( $id_or_email instanceof WP_User ) {
+		// User Object
+		$user = $id_or_email;
+	} elseif ( $id_or_email instanceof WP_Post ) {
+		// Post Object
+		$user = get_user_by( 'id', (int) $id_or_email->post_author );
+	} elseif ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) {
+		// Comment Object
+		/**
+		 * Filter the list of allowed comment types for retrieving avatars.
+		 *
+		 * @since 3.0.0
+		 *
+		 * @param array $types An array of content types. Default only contains 'comment'.
+		 */
+		$allowed_comment_types = apply_filters( 'get_avatar_comment_types', array( 'comment' ) );
+		if ( ! empty( $id_or_email->comment_type ) && ! in_array( $id_or_email->comment_type, (array) $allowed_comment_types ) ) {
+			$args['url'] = false;
+			/** This filter is documented in wp-includes/link-template.php */
+			return apply_filters( 'get_avatar_data', $args, $id_or_email );
+		}
+		if ( ! empty( $id_or_email->user_id ) ) {
+			$user = get_user_by( 'id', (int) $id_or_email->user_id );
+		}
+		if ( ( ! $user || is_wp_error( $user ) ) && ! empty( $id_or_email->comment_author_email ) ) {
+			$email = $id_or_email->comment_author_email;
+		}
+	}
+	if ( ! $email_hash ) {
+		if ( $user ) {
+			$email = $user->user_email;
+		}
+		if ( $email ) {
+			$email_hash = md5( strtolower( trim( $email ) ) );
+		}
+	}
+	if ( $email_hash ) {
+		$args['found_avatar'] = true;
+		$gravatar_server = hexdec( $email_hash[0] ) % 3;
+	} else {
+		$gravatar_server = rand( 0, 2 );
+	}
+	$url_args = array(
+		's' => $args['size'],
+		'd' => $args['default'],
+		'f' => $args['force_default'] ? 'y' : false,
+		'r' => $args['rating'],
+	);
+	$url = sprintf( 'http://%d.gravatar.com/avatar/%s', $gravatar_server, $email_hash );
+	$url = add_query_arg(
+		rawurlencode_deep( array_filter( $url_args ) ),
+		set_url_scheme( $url, $args['scheme'] )
+	);
+	/**
+	 * Filter the avatar URL.
+	 *
+	 * @since 4.2.0
+	 *
+	 * @param string            $url         The URL of the avatar.
+	 * @param int|object|string $id_or_email A user ID, email address, or comment object.
+	 * @param array             $args        Arguments passed to get_avatar_data(), after processing.
+	 */
+	$args['url'] = apply_filters( 'get_avatar_url', $url, $id_or_email, $args );
+	/**
+	 * Filter the avatar data.
+	 *
+	 * @since 4.2.0
+	 *
+	 * @param array             $args        Arguments passed to get_avatar_data(), after processing.
+	 * @param int|object|string $id_or_email A user ID, email address, or comment object.
+	 */
+	return apply_filters( 'get_avatar_data', $args, $id_or_email );
+}

changeset 5	5e2f62d02dcd
parent 0	d970ebf37754
child 7	cf61fcea0001