+ if ( empty($feed) )
+ $feed = get_default_feed();
+
+ $link = get_search_feed_link($search_query, $feed);
+
+ $permastruct = $wp_rewrite->get_search_permastruct();
+
+ if ( empty($permastruct) )
+ $link = add_query_arg('feed', 'comments-' . $feed, $link);
+ else
+ $link = add_query_arg('withcomments', 1, $link);
+
+ /** This filter is documented in wp-includes/link-template.php */
+ return apply_filters( 'search_feed_link', $link, $feed, 'comments' );
+}
+
+/**
+ * Retrieves the permalink for a post type archive.
+ *
+ * @since 3.1.0
+ * @since 4.5.0 Support for posts was added.
+ *
+ * @global WP_Rewrite $wp_rewrite
+ *
+ * @param string $post_type Post type.
+ * @return string|false 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;
+
+ if ( 'post' === $post_type ) {
+ $show_on_front = get_option( 'show_on_front' );
+ $page_for_posts = get_option( 'page_for_posts' );
+
+ if ( 'page' == $show_on_front && $page_for_posts ) {
+ $link = get_permalink( $page_for_posts );
+ } else {
+ $link = get_home_url();
+ }
+ /** This filter is documented in wp-includes/link-template.php */
+ return apply_filters( 'post_type_archive_link', $link, $post_type );
+ }
+
+ if ( ! $post_type_obj->has_archive )
+ return false;
+
+ if ( get_option( 'permalink_structure' ) && is_array( $post_type_obj->rewrite ) ) {
+ $struct = ( true === $post_type_obj->has_archive ) ? $post_type_obj->rewrite['slug'] : $post_type_obj->has_archive;
+ if ( $post_type_obj->rewrite['with_front'] )
+ $struct = $wp_rewrite->front . $struct;
+ else
+ $struct = $wp_rewrite->root . $struct;
+ $link = home_url( user_trailingslashit( $struct, 'post_type_archive' ) );
+ } else {
+ $link = home_url( '?post_type=' . $post_type );
+ }
+
+ /**
+ * Filters 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 );
+}
+
+/**
+ * Retrieves the permalink for a post type archive feed.
+ *
+ * @since 3.1.0
+ *
+ * @param string $post_type Post type
+ * @param string $feed Optional. Feed type. Default empty.
+ * @return string|false 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;
+
+ if ( ! $link = get_post_type_archive_link( $post_type ) )
+ return false;
+
+ $post_type_obj = get_post_type_object( $post_type );
+ if ( get_option( 'permalink_structure' ) && is_array( $post_type_obj->rewrite ) && $post_type_obj->rewrite['feeds'] ) {
+ $link = trailingslashit( $link );
+ $link .= 'feed/';
+ if ( $feed != $default_feed )
+ $link .= "$feed/";
+ } else {
+ $link = add_query_arg( 'feed', $feed, $link );
+ }
+
+ /**
+ * Filters 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 );
+}
+
+/**
+ * Retrieves the URL used for the post preview.
+ *
+ * Allows additional query args to be appended.
+ *
+ * @since 4.4.0
+ *
+ * @param int|WP_Post $post Optional. Post ID or `WP_Post` object. Defaults to global `$post`.
+ * @param array $query_args Optional. Array of additional query args to be appended to the link.
+ * Default empty array.
+ * @param string $preview_link Optional. Base preview link to be used if it should differ from the
+ * post permalink. Default empty.
+ * @return string|null URL used for the post preview, or null if the post does not exist.
+ */
+function get_preview_post_link( $post = null, $query_args = array(), $preview_link = '' ) {
+ $post = get_post( $post );
+ if ( ! $post ) {
+ return;
+ }
+
+ $post_type_object = get_post_type_object( $post->post_type );
+ if ( is_post_type_viewable( $post_type_object ) ) {
+ if ( ! $preview_link ) {
+ $preview_link = set_url_scheme( get_permalink( $post ) );
+ }
+
+ $query_args['preview'] = 'true';
+ $preview_link = add_query_arg( $query_args, $preview_link );
+ }
+
+ /**
+ * Filters the URL used for a post preview.
+ *
+ * @since 2.0.5
+ * @since 4.0.0 Added the `$post` parameter.
+ *
+ * @param string $preview_link URL used for the post preview.
+ * @param WP_Post $post Post object.
+ */
+ return apply_filters( 'preview_post_link', $preview_link, $post );
+}
+
+/**
+ * Retrieves the edit post link for post.
+ *
+ * Can be used within the WordPress loop or outside of it. Can be used with
+ * pages, posts, attachments, and revisions.
+ *
+ * @since 2.3.0
+ *
+ * @param int $id Optional. Post ID. Default is the ID of the global `$post`.
+ * @param string $context Optional. How to output the '&' character. Default '&'.
+ * @return string|null The edit post link for the given post. null if the post type is invalid or does
+ * not allow an editing UI.
+ */
+function get_edit_post_link( $id = 0, $context = 'display' ) {
+ if ( ! $post = get_post( $id ) )
+ return;
+
+ if ( 'revision' === $post->post_type )
+ $action = '';
+ elseif ( 'display' == $context )
+ $action = '&action=edit';
+ else
+ $action = '&action=edit';
+
+ $post_type_object = get_post_type_object( $post->post_type );
+ if ( !$post_type_object )
+ return;
+
+ if ( !current_user_can( 'edit_post', $post->ID ) )
+ return;
+
+ if ( $post_type_object->_edit_link ) {
+ $link = admin_url( sprintf( $post_type_object->_edit_link . $action, $post->ID ) );
+ } else {
+ $link = '';
+ }
+
+ /**
+ * Filters 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', $link, $post->ID, $context );
+}
+
+/**
+ * Displays the edit post link for post.
+ *
+ * @since 1.0.0
+ * @since 4.4.0 The `$class` argument was added.
+ *
+ * @param string $text Optional. Anchor text. If null, default is 'Edit This'. Default null.
+ * @param string $before Optional. Display before edit link. Default empty.
+ * @param string $after Optional. Display after edit link. Default empty.
+ * @param int $id Optional. Post ID. Default is the ID of the global `$post`.
+ * @param string $class Optional. Add custom class to link. Default 'post-edit-link'.
+ */
+function edit_post_link( $text = null, $before = '', $after = '', $id = 0, $class = 'post-edit-link' ) {
+ if ( ! $post = get_post( $id ) ) {
+ return;
+ }
+
+ if ( ! $url = get_edit_post_link( $post->ID ) ) {
+ return;
+ }
+
+ if ( null === $text ) {
+ $text = __( 'Edit This' );
+ }
+
+ $link = '<a class="' . esc_attr( $class ) . '" href="' . esc_url( $url ) . '">' . $text . '</a>';
+
+ /**
+ * Filters 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;
+}
+
+/**
+ * Retrieves the delete posts link for post.
+ *
+ * Can be used within the WordPress loop or outside of it, with any post type.
+ *
+ * @since 2.9.0
+ *
+ * @param int $id Optional. Post ID. Default is the ID of the global `$post`.
+ * @param string $deprecated Not used.
+ * @param bool $force_delete Optional. Whether to bypass trash and force deletion. Default false.
+ * @return string|void The delete post link URL for the given post.
+ */
+function get_delete_post_link( $id = 0, $deprecated = '', $force_delete = false ) {
+ if ( ! empty( $deprecated ) )
+ _deprecated_argument( __FUNCTION__, '3.0.0' );
+
+ if ( !$post = get_post( $id ) )
+ return;
+
+ $post_type_object = get_post_type_object( $post->post_type );
+ if ( !$post_type_object )
+ return;
+
+ if ( !current_user_can( 'delete_post', $post->ID ) )
+ return;
+
+ $action = ( $force_delete || !EMPTY_TRASH_DAYS ) ? 'delete' : 'trash';
+
+ $delete_link = add_query_arg( 'action', $action, admin_url( sprintf( $post_type_object->_edit_link, $post->ID ) ) );
+
+ /**
+ * Filters 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 );
+}
+
+/**
+ * Retrieves the edit comment link.
+ *
+ * @since 2.3.0
+ *
+ * @param int|WP_Comment $comment_id Optional. Comment ID or WP_Comment object.
+ * @return string|void 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&c=') . $comment->comment_ID;
+
+ /**
+ * Filters the comment edit link.
+ *
+ * @since 2.3.0
+ *
+ * @param string $location The edit link.
+ */
+ return apply_filters( 'get_edit_comment_link', $location );
+}
+
+/**
+ * Displays the edit comment link with formatting.
+ *
+ * @since 1.0.0
+ *
+ * @param string $text Optional. Anchor text. If null, default is 'Edit This'. Default null.
+ * @param string $before Optional. Display before edit link. Default empty.
+ * @param string $after Optional. Display after edit link. Default empty.
+ */
+function edit_comment_link( $text = null, $before = '', $after = '' ) {
+ $comment = get_comment();
+
+ if ( ! current_user_can( 'edit_comment', $comment->comment_ID ) ) {
+ return;
+ }
+
+ if ( null === $text ) {
+ $text = __( 'Edit This' );
+ }
+
+ $link = '<a class="comment-edit-link" href="' . esc_url( get_edit_comment_link( $comment ) ) . '">' . $text . '</a>';
+
+ /**
+ * Filters 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;
+}
+
+/**
+ * Displays the edit bookmark link.
+ *
+ * @since 2.7.0
+ *
+ * @param int|stdClass $link Optional. Bookmark ID. Default is the id of the current bookmark.
+ * @return string|void 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&link_id=') . $link->link_id;
+
+ /**
+ * Filters the bookmark 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 );
+}
+
+/**
+ * Displays the edit bookmark link anchor content.
+ *
+ * @since 2.7.0
+ *
+ * @param string $link Optional. Anchor text. Default empty.
+ * @param string $before Optional. Display before edit link. Default empty.
+ * @param string $after Optional. Display after edit link. Default empty.
+ * @param int $bookmark Optional. Bookmark ID. Default is the current bookmark.
+ */
+function edit_bookmark_link( $link = '', $before = '', $after = '', $bookmark = null ) {
+ $bookmark = get_bookmark($bookmark);
+
+ if ( !current_user_can('manage_links') )
+ return;
+
+ if ( empty($link) )
+ $link = __('Edit This');
+
+ $link = '<a href="' . esc_url( get_edit_bookmark_link( $bookmark ) ) . '">' . $link . '</a>';
+
+ /**
+ * Filters 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;
+}
+
+/**
+ * Retrieves the edit user link.
+ *
+ * @since 3.5.0
+ *
+ * @param int $user_id Optional. User ID. Defaults to the current user.
+ * @return string URL to edit user page or empty string.
+ */
+function get_edit_user_link( $user_id = null ) {
+ if ( ! $user_id )
+ $user_id = get_current_user_id();
+
+ if ( empty( $user_id ) || ! current_user_can( 'edit_user', $user_id ) )
+ return '';
+
+ $user = get_userdata( $user_id );
+
+ if ( ! $user )
+ return '';
+
+ if ( get_current_user_id() == $user->ID )
+ $link = get_edit_profile_url( $user->ID );
+ else
+ $link = add_query_arg( 'user_id', $user->ID, self_admin_url( 'user-edit.php' ) );
+
+ /**
+ * Filters 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
+
+/**
+ * Retrieves the previous post that is adjacent to the current post.
+ *
+ * @since 1.5.0
+ *
+ * @param bool $in_same_term Optional. Whether post should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ * @return null|string|WP_Post Post object if successful. Null if global $post is not set. Empty string if no
+ * corresponding post exists.
+ */
+function get_previous_post( $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
+ return get_adjacent_post( $in_same_term, $excluded_terms, true, $taxonomy );
+}
+
+/**
+ * Retrieves the next post that is adjacent to the current post.
+ *
+ * @since 1.5.0
+ *
+ * @param bool $in_same_term Optional. Whether post should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ * @return null|string|WP_Post Post object if successful. Null if global $post is not set. Empty string if no
+ * corresponding post exists.
+ */
+function get_next_post( $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
+ return get_adjacent_post( $in_same_term, $excluded_terms, false, $taxonomy );
+}
+
+/**
+ * Retrieves the adjacent post.
+ *
+ * Can either be next or previous post.
+ *
+ * @since 2.5.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param bool $in_same_term Optional. Whether post should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
+ * @param bool $previous Optional. Whether to retrieve previous post. Default true
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ * @return null|string|WP_Post Post object if successful. Null if global $post is not set. Empty string if no
+ * corresponding post exists.
+ */
+function get_adjacent_post( $in_same_term = false, $excluded_terms = '', $previous = true, $taxonomy = 'category' ) {
+ global $wpdb;
+
+ if ( ( ! $post = get_post() ) || ! taxonomy_exists( $taxonomy ) )
+ return null;
+
+ $current_post_date = $post->post_date;
+
+ $join = '';
+ $where = '';
+ $adjacent = $previous ? 'previous' : 'next';
+
+ if ( $in_same_term || ! empty( $excluded_terms ) ) {
+ 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__, '3.3.0', 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 ) {
+ $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 ( ! is_object_in_taxonomy( $post->post_type, $taxonomy ) )
+ return '';
+ $term_array = wp_get_object_terms( $post->ID, $taxonomy, array( 'fields' => 'ids' ) );
+
+ // 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 '';
+
+ $where .= " AND tt.term_id IN (" . implode( ',', $term_array ) . ")";
+ }
+
+ /**
+ * Filters the IDs of terms excluded from adjacent post queries.
+ *
+ * The dynamic portion of the hook name, `$adjacent`, refers to the type
+ * of adjacency, 'next' or 'previous'.
+ *
+ * @since 4.4.0
+ *
+ * @param string $excluded_terms Array of excluded term IDs.
+ */
+ $excluded_terms = apply_filters( "get_{$adjacent}_post_excluded_terms", $excluded_terms );
+
+ if ( ! empty( $excluded_terms ) ) {
+ $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( ',', array_map( 'intval', $excluded_terms ) ) . ') )';
+ }
+ }
+
+ // 'post_status' clause depends on the current user.
+ if ( is_user_logged_in() ) {
+ $user_id = get_current_user_id();
+
+ $post_type_object = get_post_type_object( $post->post_type );
+ if ( empty( $post_type_object ) ) {
+ $post_type_cap = $post->post_type;
+ $read_private_cap = 'read_private_' . $post_type_cap . 's';
+ } else {
+ $read_private_cap = $post_type_object->cap->read_private_posts;
+ }
+
+ /*
+ * Results should include private posts belonging to the current user, or private posts where the
+ * current user has the 'read_private_posts' cap.
+ */
+ $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'";
+ }
+
+ $op = $previous ? '<' : '>';
+ $order = $previous ? 'DESC' : 'ASC';
+
+ /**
+ * Filters the JOIN clause in the SQL for an adjacent post query.
+ *
+ * The dynamic portion of the hook name, `$adjacent`, refers to the type
+ * of adjacency, 'next' or 'previous'.
+ *
+ * @since 2.5.0
+ * @since 4.4.0 Added the `$taxonomy` and `$post` parameters.
+ *
+ * @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.
+ * @param string $taxonomy Taxonomy. Used to identify the term used when `$in_same_term` is true.
+ * @param WP_Post $post WP_Post object.
+ */
+ $join = apply_filters( "get_{$adjacent}_post_join", $join, $in_same_term, $excluded_terms, $taxonomy, $post );
+
+ /**
+ * Filters the WHERE clause in the SQL for an adjacent post query.
+ *
+ * The dynamic portion of the hook name, `$adjacent`, refers to the type
+ * of adjacency, 'next' or 'previous'.
+ *
+ * @since 2.5.0
+ * @since 4.4.0 Added the `$taxonomy` and `$post` parameters.
+ *
+ * @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.
+ * @param string $taxonomy Taxonomy. Used to identify the term used when `$in_same_term` is true.
+ * @param WP_Post $post WP_Post object.
+ */
+ $where = apply_filters( "get_{$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, $taxonomy, $post );
+
+ /**
+ * Filters the ORDER BY clause in the SQL for an adjacent post query.
+ *
+ * The dynamic portion of the hook name, `$adjacent`, refers to the type
+ * of adjacency, 'next' or 'previous'.
+ *
+ * @since 2.5.0
+ * @since 4.4.0 Added the `$post` parameter.
+ *
+ * @param string $order_by The `ORDER BY` clause in the SQL.
+ * @param WP_Post $post WP_Post object.
+ */
+ $sort = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order LIMIT 1", $post );
+
+ $query = "SELECT p.ID FROM $wpdb->posts AS p $join $where $sort";
+ $query_key = 'adjacent_post_' . md5( $query );
+ $result = wp_cache_get( $query_key, 'counts' );
+ if ( false !== $result ) {
+ if ( $result )
+ $result = get_post( $result );
+ return $result;
+ }
+
+ $result = $wpdb->get_var( $query );
+ if ( null === $result )
+ $result = '';
+
+ wp_cache_set( $query_key, $result, 'counts' );
+
+ if ( $result )
+ $result = get_post( $result );
+
+ return $result;
+}
+
+/**
+ * Retrieves the adjacent post relational link.
+ *
+ * Can either be next or previous post relational link.
+ *
+ * @since 2.8.0
+ *
+ * @param string $title Optional. Link title format. Default '%title'.
+ * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
+ * @param bool $previous Optional. Whether to display link to previous or next post. Default true.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ * @return string|void The adjacent post relational link URL.
+ */
+function get_adjacent_post_rel_link( $title = '%title', $in_same_term = false, $excluded_terms = '', $previous = true, $taxonomy = 'category' ) {
+ if ( $previous && is_attachment() && $post = get_post() )
+ $post = get_post( $post->post_parent );
+ else
+ $post = get_adjacent_post( $in_same_term, $excluded_terms, $previous, $taxonomy );
+
+ if ( empty( $post ) )
+ return;
+
+ $post_title = the_title_attribute( array( 'echo' => false, 'post' => $post ) );
+
+ if ( empty( $post_title ) )
+ $post_title = $previous ? __( 'Previous Post' ) : __( 'Next Post' );
+
+ $date = mysql2date( get_option( 'date_format' ), $post->post_date );
+
+ $title = str_replace( '%title', $post_title, $title );
+ $title = str_replace( '%date', $date, $title );
+
+ $link = $previous ? "<link rel='prev' title='" : "<link rel='next' title='";
+ $link .= esc_attr( $title );
+ $link .= "' href='" . get_permalink( $post ) . "' />\n";
+
+ $adjacent = $previous ? 'previous' : 'next';
+
+ /**
+ * Filters the adjacent post relational link.
+ *
+ * The dynamic portion of the hook name, `$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 );
+}
+
+/**
+ * Displays the relational links for the posts adjacent to the current post.
+ *
+ * @since 2.8.0
+ *
+ * @param string $title Optional. Link title format. Default '%title'.
+ * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ */
+function adjacent_posts_rel_link( $title = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
+ echo get_adjacent_post_rel_link( $title, $in_same_term, $excluded_terms, true, $taxonomy );
+ echo get_adjacent_post_rel_link( $title, $in_same_term, $excluded_terms, false, $taxonomy );
+}
+
+/**
+ * Displays 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
+ *
+ * @see adjacent_posts_rel_link()
+ */
+function adjacent_posts_rel_link_wp_head() {
+ if ( ! is_single() || is_attachment() ) {
+ return;
+ }
+ adjacent_posts_rel_link();
+}
+
+/**
+ * Displays the relational link for the next post adjacent to the current post.
+ *
+ * @since 2.8.0
+ *
+ * @see get_adjacent_post_rel_link()
+ *
+ * @param string $title Optional. Link title format. Default '%title'.
+ * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ */
+function next_post_rel_link( $title = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
+ echo get_adjacent_post_rel_link( $title, $in_same_term, $excluded_terms, false, $taxonomy );
+}
+
+/**
+ * Displays the relational link for the previous post adjacent to the current post.
+ *
+ * @since 2.8.0
+ *
+ * @see get_adjacent_post_rel_link()
+ *
+ * @param string $title Optional. Link title format. Default '%title'.
+ * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default true.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ */
+function prev_post_rel_link( $title = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
+ echo get_adjacent_post_rel_link( $title, $in_same_term, $excluded_terms, true, $taxonomy );
+}
+
+/**
+ * Retrieves the boundary post.
+ *
+ * Boundary being either the first or last post by publish date within the constraints specified
+ * by $in_same_term or $excluded_terms.
+ *
+ * @since 2.8.0
+ *
+ * @param bool $in_same_term Optional. Whether returned post should be in a same taxonomy term.
+ * Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs.
+ * Default empty.
+ * @param bool $start Optional. Whether to retrieve first or last post. Default true
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ * @return null|array Array containing the boundary post object if successful, null otherwise.
+ */
+function get_boundary_post( $in_same_term = false, $excluded_terms = '', $start = true, $taxonomy = 'category' ) {
+ $post = get_post();
+ if ( ! $post || ! is_single() || is_attachment() || ! taxonomy_exists( $taxonomy ) )
+ return null;
+
+ $query_args = array(
+ 'posts_per_page' => 1,
+ 'order' => $start ? 'ASC' : 'DESC',
+ 'update_post_term_cache' => false,
+ 'update_post_meta_cache' => false
+ );
+
+ $term_array = array();
+
+ if ( ! is_array( $excluded_terms ) ) {
+ if ( ! empty( $excluded_terms ) )
+ $excluded_terms = explode( ',', $excluded_terms );
+ else
+ $excluded_terms = array();
+ }
+
+ 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(
+ 'taxonomy' => $taxonomy,
+ 'terms' => array_merge( $term_array, $excluded_terms )
+ ) );
+ }
+
+ return get_posts( $query_args );
+}
+
+/**
+ * Retrieves the previous post link that is adjacent to the current post.
+ *
+ * @since 3.7.0
+ *
+ * @param string $format Optional. Link anchor format. Default '« %link'.
+ * @param string $link Optional. Link permalink format. Default '%title%'.
+ * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
+ * @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 = '« %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 );
+}
+
+/**
+ * Displays the previous post link that is adjacent to the current post.
+ *
+ * @since 1.5.0
+ *
+ * @see get_previous_post_link()
+ *
+ * @param string $format Optional. Link anchor format. Default '« %link'.
+ * @param string $link Optional. Link permalink format. Default '%title'.
+ * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ */
+function previous_post_link( $format = '« %link', $link = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
+ echo get_previous_post_link( $format, $link, $in_same_term, $excluded_terms, $taxonomy );
+}
+
+/**
+ * Retrieves the next post link that is adjacent to the current post.
+ *
+ * @since 3.7.0
+ *
+ * @param string $format Optional. Link anchor format. Default '« %link'.
+ * @param string $link Optional. Link permalink format. Default '%title'.
+ * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ * @return string The link URL of the next post in relation to the current post.
+ */
+function get_next_post_link( $format = '%link »', $link = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
+ return get_adjacent_post_link( $format, $link, $in_same_term, $excluded_terms, false, $taxonomy );
+}
+
+/**
+ * Displays the 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. Default '« %link'.
+ * @param string $link Optional. Link permalink format. Default '%title'
+ * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded term IDs. Default empty.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ */
+function next_post_link( $format = '%link »', $link = '%title', $in_same_term = false, $excluded_terms = '', $taxonomy = 'category' ) {
+ echo get_next_post_link( $format, $link, $in_same_term, $excluded_terms, $taxonomy );
+}
+
+/**
+ * Retrieves the adjacent post link.
+ *
+ * Can be either next post link or previous.
+ *
+ * @since 3.7.0
+ *
+ * @param string $format Link anchor format.
+ * @param string $link Link permalink format.
+ * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded terms IDs. Default empty.
+ * @param bool $previous Optional. Whether to display link to previous or next post. Default true.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ * @return string The link URL of the previous or next post in relation to the current post.
+ */
+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_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 );
+ $inlink = str_replace( '%date', $date, $inlink );
+ $inlink = $string . $inlink . '</a>';
+
+ $output = str_replace( '%link', $inlink, $format );
+ }
+
+ $adjacent = $previous ? 'previous' : 'next';
+
+ /**
+ * Filters the adjacent post link.
+ *
+ * The dynamic portion of the hook name, `$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 );
+}
+
+/**
+ * Displays the adjacent post link.
+ *
+ * Can be either next post link or previous.
+ *
+ * @since 2.5.0
+ *
+ * @param string $format Link anchor format.
+ * @param string $link Link permalink format.
+ * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. Default false.
+ * @param array|string $excluded_terms Optional. Array or comma-separated list of excluded category IDs. Default empty.
+ * @param bool $previous Optional. Whether to display link to previous or next post. Default true.
+ * @param string $taxonomy Optional. Taxonomy, if $in_same_term is true. Default 'category'.
+ */
+function adjacent_post_link( $format, $link, $in_same_term = false, $excluded_terms = '', $previous = true, $taxonomy = 'category' ) {
+ echo get_adjacent_post_link( $format, $link, $in_same_term, $excluded_terms, $previous, $taxonomy );
+}
+
+/**
+ * Retrieves the link for a page number.
+ *
+ * @since 1.5.0
+ *
+ * @global WP_Rewrite $wp_rewrite
+ *
+ * @param int $pagenum Optional. Page ID. Default 1.
+ * @param bool $escape Optional. Whether to escape the URL for display, with esc_url(). Defaults to true.
+ * Otherwise, prepares the URL with esc_url_raw().
+ * @return string The link URL for the given page number.
+ */
+function get_pagenum_link($pagenum = 1, $escape = true ) {
+ global $wp_rewrite;
+
+ $pagenum = (int) $pagenum;
+
+ $request = remove_query_arg( 'paged' );
+
+ $home_root = parse_url(home_url());
+ $home_root = ( isset($home_root['path']) ) ? $home_root['path'] : '';
+ $home_root = preg_quote( $home_root, '|' );
+
+ $request = preg_replace('|^'. $home_root . '|i', '', $request);
+ $request = preg_replace('|^/+|', '', $request);
+
+ if ( !$wp_rewrite->using_permalinks() || is_admin() ) {
+ $base = trailingslashit( get_bloginfo( 'url' ) );
+
+ if ( $pagenum > 1 ) {
+ $result = add_query_arg( 'paged', $pagenum, $base . $request );
+ } else {
+ $result = $base . $request;
+ }
+ } else {
+ $qs_regex = '|\?.*?$|';
+ preg_match( $qs_regex, $request, $qs_match );
+
+ if ( !empty( $qs_match[0] ) ) {
+ $query_string = $qs_match[0];
+ $request = preg_replace( $qs_regex, '', $request );
+ } else {
+ $query_string = '';
+ }
+
+ $request = preg_replace( "|$wp_rewrite->pagination_base/\d+/?$|", '', $request);
+ $request = preg_replace( '|^' . preg_quote( $wp_rewrite->index, '|' ) . '|i', '', $request);
+ $request = ltrim($request, '/');
+
+ $base = trailingslashit( get_bloginfo( 'url' ) );
+
+ if ( $wp_rewrite->using_index_permalinks() && ( $pagenum > 1 || '' != $request ) )
+ $base .= $wp_rewrite->index . '/';
+
+ if ( $pagenum > 1 ) {
+ $request = ( ( !empty( $request ) ) ? trailingslashit( $request ) : $request ) . user_trailingslashit( $wp_rewrite->pagination_base . "/" . $pagenum, 'paged' );
+ }
+
+ $result = $base . $request . $query_string;
+ }
+
+ /**
+ * Filters 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 );
+}
+
+/**
+ * Retrieves the next posts page link.
+ *
+ * Backported from 2.1.3 to 2.0.10.
+ *
+ * @since 2.0.10
+ *
+ * @global int $paged
+ *
+ * @param int $max_page Optional. Max pages. Default 0.
+ * @return string|void The link URL for next posts page.
+ */
+function get_next_posts_page_link($max_page = 0) {
+ global $paged;
+
+ if ( !is_single() ) {
+ if ( !$paged )
+ $paged = 1;
+ $nextpage = intval($paged) + 1;
+ if ( !$max_page || $max_page >= $nextpage )
+ return get_pagenum_link($nextpage);
+ }
+}
+
+/**
+ * Displays or retrieves the next posts page link.
+ *
+ * @since 0.71
+ *
+ * @param int $max_page Optional. Max pages. Default 0.
+ * @param bool $echo Optional. Whether to echo the link. Default true.
+ * @return string|void The link URL for next posts page if `$echo = false`.
+ */
+function next_posts( $max_page = 0, $echo = true ) {
+ $output = esc_url( get_next_posts_page_link( $max_page ) );
+
+ if ( $echo )
+ echo $output;
+ else
+ return $output;
+}
+
+/**
+ * Retrieves the next posts page link.
+ *
+ * @since 2.7.0
+ *
+ * @global int $paged
+ * @global WP_Query $wp_query
+ *
+ * @param string $label Content for link text.
+ * @param int $max_page Optional. Max pages. Default 0.
+ * @return string|void HTML-formatted next posts page link.
+ */
+function get_next_posts_link( $label = null, $max_page = 0 ) {
+ global $paged, $wp_query;
+
+ if ( !$max_page )
+ $max_page = $wp_query->max_num_pages;
+
+ if ( !$paged )
+ $paged = 1;
+
+ $nextpage = intval($paged) + 1;
+
+ if ( null === $label )
+ $label = __( 'Next Page »' );
+
+ if ( !is_single() && ( $nextpage <= $max_page ) ) {
+ /**
+ * Filters 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', '&$1', $label) . '</a>';
+ }
+}
+
+/**
+ * Displays the next posts page link.
+ *
+ * @since 0.71
+ *
+ * @param string $label Content for link text.
+ * @param int $max_page Optional. Max pages. Default 0.
+ */
+function next_posts_link( $label = null, $max_page = 0 ) {
+ echo get_next_posts_link( $label, $max_page );
+}
+
+/**
+ * Retrieves the previous posts page link.
+ *
+ * Will only return string, if not on a single page or post.
+ *
+ * Backported to 2.0.10 from 2.1.3.
+ *
+ * @since 2.0.10
+ *
+ * @global int $paged
+ *
+ * @return string|void The link for the previous posts page.
+ */
+function get_previous_posts_page_link() {
+ global $paged;
+
+ if ( !is_single() ) {
+ $nextpage = intval($paged) - 1;
+ if ( $nextpage < 1 )
+ $nextpage = 1;
+ return get_pagenum_link($nextpage);
+ }
+}
+
+/**
+ * Displays or retrieves the previous posts page link.
+ *
+ * @since 0.71
+ *
+ * @param bool $echo Optional. Whether to echo the link. Default true.
+ * @return string|void The previous posts page link if `$echo = false`.
+ */
+function previous_posts( $echo = true ) {
+ $output = esc_url( get_previous_posts_page_link() );
+
+ if ( $echo )
+ echo $output;
+ else
+ return $output;
+}
+
+/**
+ * Retrieves the previous posts page link.
+ *
+ * @since 2.7.0
+ *
+ * @global int $paged
+ *
+ * @param string $label Optional. Previous page link text.
+ * @return string|void HTML-formatted previous page link.
+ */
+function get_previous_posts_link( $label = null ) {
+ global $paged;
+
+ if ( null === $label )
+ $label = __( '« Previous Page' );
+
+ if ( !is_single() && $paged > 1 ) {
+ /**
+ * Filters 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', '&$1', $label ) .'</a>';
+ }
+}
+
+/**
+ * Displays the previous posts page link.
+ *
+ * @since 0.71
+ *
+ * @param string $label Optional. Previous page link text.
+ */
+function previous_posts_link( $label = null ) {
+ echo get_previous_posts_link( $label );
+}
+
+/**
+ * Retrieves the post pages link navigation for previous and next pages.
+ *
+ * @since 2.8.0
+ *
+ * @global WP_Query $wp_query
+ *
+ * @param string|array $args {
+ * Optional. Arguments to build the post pages link navigation.
+ *
+ * @type string $sep Separator character. Default '—'.
+ * @type string $prelabel Link text to display for the previous page link.
+ * Default '« Previous Page'.
+ * @type string $nxtlabel Link text to display for the next page link.
+ * Default 'Next Page »'.
+ * }
+ * @return string The posts link navigation.
+ */
+function get_posts_nav_link( $args = array() ) {
+ global $wp_query;
+
+ $return = '';
+
+ if ( !is_singular() ) {
+ $defaults = array(
+ 'sep' => ' — ',
+ 'prelabel' => __('« Previous Page'),
+ 'nxtlabel' => __('Next Page »'),
+ );
+ $args = wp_parse_args( $args, $defaults );
+
+ $max_num_pages = $wp_query->max_num_pages;
+ $paged = get_query_var('paged');
+
+ //only have sep if there's both prev and next results
+ if ($paged < 2 || $paged >= $max_num_pages) {
+ $args['sep'] = '';
+ }
+
+ if ( $max_num_pages > 1 ) {
+ $return = get_previous_posts_link($args['prelabel']);
+ $return .= preg_replace('/&([^#])(?![a-z]{1,8};)/i', '&$1', $args['sep']);
+ $return .= get_next_posts_link($args['nxtlabel']);
+ }
+ }
+ return $return;
+
+}
+
+/**
+ * Displays the post pages link navigation for previous and next pages.
+ *
+ * @since 0.71
+ *
+ * @param string $sep Optional. Separator for posts navigation links. Default empty.
+ * @param string $prelabel Optional. Label for previous pages. Default empty.
+ * @param string $nxtlabel Optional Label for next pages. Default empty.
+ */
+function posts_nav_link( $sep = '', $prelabel = '', $nxtlabel = '' ) {
+ $args = array_filter( compact('sep', 'prelabel', 'nxtlabel') );
+ echo get_posts_nav_link($args);
+}
+
+/**
+ * Retrieves the navigation to next/previous post, when applicable.
+ *
+ * @since 4.1.0
+ * @since 4.4.0 Introduced the `in_same_term`, `excluded_terms`, and `taxonomy` arguments.
+ *
+ * @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 bool $in_same_term Whether link should be in a same taxonomy term. Default false.
+ * @type array|string $excluded_terms Array or comma-separated list of excluded term IDs. Default empty.
+ * @type string $taxonomy Taxonomy, if `$in_same_term` is true. Default 'category'.
+ * @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',
+ 'in_same_term' => false,
+ 'excluded_terms' => '',
+ 'taxonomy' => 'category',
+ 'screen_reader_text' => __( 'Post navigation' ),
+ ) );
+
+ $navigation = '';
+
+ $previous = get_previous_post_link(
+ '<div class="nav-previous">%link</div>',
+ $args['prev_text'],
+ $args['in_same_term'],
+ $args['excluded_terms'],
+ $args['taxonomy']
+ );
+
+ $next = get_next_post_link(
+ '<div class="nav-next">%link</div>',
+ $args['next_text'],
+ $args['in_same_term'],
+ $args['excluded_terms'],
+ $args['taxonomy']
+ );
+
+ // 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;
+}
+
+/**
+ * Displays the navigation to next/previous post, when applicable.
+ *
+ * @since 4.1.0
+ *
+ * @param array $args Optional. See get_the_post_navigation() for available arguments.
+ * Default empty array.
+ */
+function the_post_navigation( $args = array() ) {
+ echo get_the_post_navigation( $args );
+}
+
+/**
+ * Returns the 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;
+}
+
+/**
+ * Displays the navigation to next/previous set of posts, when applicable.
+ *
+ * @since 4.1.0
+ *
+ * @param array $args Optional. See get_the_posts_navigation() for available arguments.
+ * Default empty array.
+ */
+function the_posts_navigation( $args = array() ) {
+ echo get_the_posts_navigation( $args );
+}
+
+/**
+ * Retrieves 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 set of posts' ),
+ 'next_text' => _x( 'Next', 'next set of posts' ),
+ '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;
+}
+
+/**
+ * Displays a paginated navigation to next/previous set of posts, when applicable.
+ *
+ * @since 4.1.0
+ *
+ * @param array $args Optional. 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>';
+
+ /**
+ * Filters the navigation markup template.
+ *
+ * Note: The filtered template HTML must contain specifiers for the navigation
+ * class (%1$s), the screen-reader-text value (%2$s), and placement of the
+ * navigation links (%3$s):
+ *
+ * <nav class="navigation %1$s" role="navigation">
+ * <h2 class="screen-reader-text">%2$s</h2>
+ * <div class="nav-links">%3$s</div>
+ * </nav>
+ *
+ * @since 4.4.0
+ *
+ * @param string $template The default template.
+ * @param string $class The class passed by the calling function.
+ * @return string Navigation template.
+ */
+ $template = apply_filters( 'navigation_markup_template', $template, $class );
+
+ return sprintf( $template, sanitize_html_class( $class ), esc_html( $screen_reader_text ), $links );
+}
+
+/**
+ * Retrieves the comments page number link.
+ *
+ * @since 2.7.0
+ *
+ * @global WP_Rewrite $wp_rewrite
+ *
+ * @param int $pagenum Optional. Page number. Default 1.
+ * @param int $max_page Optional. The maximum number of comment pages. Default 0.
+ * @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) . $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) . $wp_rewrite->comments_pagination_base . '-' . $pagenum, 'commentpaged');
+ else
+ $result = add_query_arg( 'cpage', $pagenum, $result );
+ }
+
+ $result .= '#comments';
+
+ /**
+ * Filters the comments page number link for the current request.
+ *
+ * @since 2.7.0
+ *
+ * @param string $result The comments page number link.
+ */
+ return apply_filters( 'get_comments_pagenum_link', $result );
+}
+
+/**
+ * Retrieves the link to the next comments page.
+ *
+ * @since 2.7.1
+ *
+ * @global WP_Query $wp_query
+ *
+ * @param string $label Optional. Label for link text. Default empty.
+ * @param int $max_page Optional. Max page. Default 0.
+ * @return string|void HTML-formatted link for the next page of comments.
+ */
+function get_next_comments_link( $label = '', $max_page = 0 ) {
+ global $wp_query;
+
+ if ( ! is_singular() )
+ return;
+
+ $page = get_query_var('cpage');
+
+ if ( ! $page ) {
+ $page = 1;
+ }
+
+ $nextpage = intval($page) + 1;
+
+ if ( empty($max_page) )
+ $max_page = $wp_query->max_num_comment_pages;
+
+ if ( empty($max_page) )
+ $max_page = get_comment_pages_count();
+
+ if ( $nextpage > $max_page )
+ return;
+
+ if ( empty($label) )
+ $label = __('Newer Comments »');
+
+ /**
+ * Filters 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', '&$1', $label) .'</a>';
+}
+
+/**
+ * Displays the link to the next comments page.
+ *
+ * @since 2.7.0
+ *
+ * @param string $label Optional. Label for link text. Default empty.
+ * @param int $max_page Optional. Max page. Default 0.
+ */
+function next_comments_link( $label = '', $max_page = 0 ) {
+ echo get_next_comments_link( $label, $max_page );
+}
+
+/**
+ * Retrieves the link to the previous comments page.
+ *
+ * @since 2.7.1
+ *
+ * @param string $label Optional. Label for comments link text. Default empty.
+ * @return string|void HTML-formatted link for the previous page of comments.
+ */
+function get_previous_comments_link( $label = '' ) {
+ if ( ! is_singular() )
+ return;
+
+ $page = get_query_var('cpage');
+
+ if ( intval($page) <= 1 )
+ return;
+
+ $prevpage = intval($page) - 1;
+
+ if ( empty($label) )
+ $label = __('« Older Comments');
+
+ /**
+ * Filters 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', '&$1', $label) .'</a>';
+}
+
+/**
+ * Displays the link to the previous comments page.
+ *
+ * @since 2.7.0
+ *
+ * @param string $label Optional. Label for comments link text. Default empty.
+ */
+function previous_comments_link( $label = '' ) {
+ echo get_previous_comments_link( $label );
+}
+
+/**
+ * Displays or retrieves pagination links for the comments on the current post.
+ *
+ * @see paginate_links()
+ * @since 2.7.0
+ *
+ * @global WP_Rewrite $wp_rewrite
+ *
+ * @param string|array $args Optional args. See paginate_links(). Default empty array.
+ * @return string|void Markup for pagination links.
+ */
+function paginate_comments_links( $args = array() ) {
+ global $wp_rewrite;
+
+ if ( ! is_singular() )
+ return;
+
+ $page = get_query_var('cpage');
+ if ( !$page )
+ $page = 1;
+ $max_page = get_comment_pages_count();
+ $defaults = array(
+ 'base' => add_query_arg( 'cpage', '%#%' ),
+ 'format' => '',
+ 'total' => $max_page,
+ 'current' => $page,
+ 'echo' => true,
+ 'add_fragment' => '#comments'
+ );
+ if ( $wp_rewrite->using_permalinks() )
+ $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'] )
+ echo $page_links;
+ else
+ return $page_links;
+}
+
+/**
+ * Retrieves navigation to next/previous set of comments, when applicable.
+ *
+ * @since 4.4.0
+ *
+ * @param array $args {
+ * Optional. Default comments navigation arguments.
+ *
+ * @type string $prev_text Anchor text to display in the previous comments link.
+ * Default 'Older comments'.
+ * @type string $next_text Anchor text to display in the next comments link.
+ * Default 'Newer comments'.
+ * @type string $screen_reader_text Screen reader text for nav element. Default 'Comments navigation'.
+ * }
+ * @return string Markup for comments links.
+ */
+function get_the_comments_navigation( $args = array() ) {
+ $navigation = '';
+
+ // Are there comments to navigate through?
+ if ( get_comment_pages_count() > 1 ) {
+ $args = wp_parse_args( $args, array(
+ 'prev_text' => __( 'Older comments' ),
+ 'next_text' => __( 'Newer comments' ),
+ 'screen_reader_text' => __( 'Comments navigation' ),
+ ) );
+
+ $prev_link = get_previous_comments_link( $args['prev_text'] );
+ $next_link = get_next_comments_link( $args['next_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, 'comment-navigation', $args['screen_reader_text'] );
+ }
+
+ return $navigation;
+}
+
+/**
+ * Displays navigation to next/previous set of comments, when applicable.
+ *
+ * @since 4.4.0
+ *
+ * @param array $args See get_the_comments_navigation() for available arguments. Default empty array.
+ */
+function the_comments_navigation( $args = array() ) {
+ echo get_the_comments_navigation( $args );
+}
+
+/**
+ * Retrieves a paginated navigation to next/previous set of comments, when applicable.
+ *
+ * @since 4.4.0
+ *
+ * @see paginate_comments_links()
+ *
+ * @param array $args {
+ * Optional. Default pagination arguments.
+ *
+ * @type string $screen_reader_text Screen reader text for nav element. Default 'Comments navigation'.
+ * }
+ * @return string Markup for pagination links.
+ */
+function get_the_comments_pagination( $args = array() ) {
+ $navigation = '';
+ $args = wp_parse_args( $args, array(
+ 'screen_reader_text' => __( 'Comments navigation' ),
+ ) );
+ $args['echo'] = false;
+
+ // Make sure we get plain links, so we get a string we can work with.
+ $args['type'] = 'plain';
+
+ $links = paginate_comments_links( $args );
+
+ if ( $links ) {
+ $navigation = _navigation_markup( $links, 'comments-pagination', $args['screen_reader_text'] );
+ }
+
+ return $navigation;
+}
+
+/**
+ * Displays a paginated navigation to next/previous set of comments, when applicable.
+ *
+ * @since 4.4.0
+ *
+ * @param array $args See get_the_comments_pagination() for available arguments. Default empty array.
+ */
+function the_comments_pagination( $args = array() ) {
+ echo get_the_comments_pagination( $args );
+}
+
+/**
+ * Retrieves the Press This bookmarklet link.
+ *
+ * @since 2.6.0
+ *
+ * @global bool $is_IE Whether the browser matches an Internet Explorer user agent.
+ */
+function get_shortcut_link() {
+ global $is_IE;
+
+ include_once( ABSPATH . 'wp-admin/includes/class-wp-press-this.php' );
+
+ $link = '';
+
+ if ( $is_IE ) {
+ /*
+ * Return the old/shorter bookmarklet code for MSIE 8 and lower,
+ * since they only support a max length of ~2000 characters for
+ * bookmark[let] URLs, which is way to small for our smarter one.
+ * Do update the version number so users do not get the "upgrade your
+ * bookmarklet" notice when using PT in those browsers.
+ */
+ $ua = $_SERVER['HTTP_USER_AGENT'];
+
+ if ( ! empty( $ua ) && preg_match( '/\bMSIE (\d)/', $ua, $matches ) && (int) $matches[1] <= 8 ) {
+ $url = wp_json_encode( admin_url( 'press-this.php' ) );
+
+ $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=' . WP_Press_This::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=' . WP_Press_This::VERSION );
+ $link = 'javascript:' . str_replace( 'window.pt_url', $url, $src );
+ }
+ }
+
+ $link = str_replace( array( "\r", "\n", "\t" ), '', $link );
+
+ /**
+ * Filters the Press This bookmarklet link.
+ *
+ * @since 2.6.0
+ *
+ * @param string $link The Press This bookmarklet link.
+ */
+ return apply_filters( 'shortcut_link', $link );
+}
+
+/**
+ * Retrieves the URL for the current site where the front end is accessible.
+ *
+ * Returns the 'home' option with the appropriate protocol. The protocol will be 'https'
+ * if is_ssl() evaluates to true; otherwise, it will be the same as the 'home' option.
+ * If `$scheme` is 'http' or 'https', is_ssl() is overridden.
+ *
+ * @since 3.0.0
+ *
+ * @param string $path Optional. Path relative to the home URL. Default empty.
+ * @param string|null $scheme Optional. Scheme to give the home URL context. Accepts
+ * 'http', 'https', 'relative', 'rest', or null. Default null.
+ * @return string Home URL link with optional path appended.
+ */
+function home_url( $path = '', $scheme = null ) {
+ return get_home_url( null, $path, $scheme );
+}
+
+/**
+ * Retrieves the URL for a given site where the front end is accessible.
+ *
+ * Returns the 'home' option with the appropriate protocol. The protocol will be 'https'
+ * if is_ssl() evaluates to true; otherwise, it will be the same as the 'home' option.
+ * If `$scheme` is 'http' or 'https', is_ssl() is overridden.
+ *
+ * @since 3.0.0
+ *
+ * @global string $pagenow
+ *
+ * @param int $blog_id Optional. Site ID. Default null (current site).
+ * @param string $path Optional. Path relative to the home URL. Default empty.
+ * @param string|null $scheme Optional. Scheme to give the home URL context. Accepts
+ * 'http', 'https', 'relative', 'rest', or null. Default null.
+ * @return string Home URL link with optional path appended.
+ */
+function get_home_url( $blog_id = null, $path = '', $scheme = null ) {
+ global $pagenow;
+
+ $orig_scheme = $scheme;
+
+ if ( empty( $blog_id ) || !is_multisite() ) {
+ $url = get_option( 'home' );
+ } else {
+ switch_to_blog( $blog_id );
+ $url = get_option( 'home' );
+ restore_current_blog();
+ }
+
+ if ( ! in_array( $scheme, array( 'http', 'https', 'relative' ) ) ) {
+ if ( is_ssl() && ! is_admin() && 'wp-login.php' !== $pagenow )
+ $scheme = 'https';
+ else
+ $scheme = parse_url( $url, PHP_URL_SCHEME );
+ }
+
+ $url = set_url_scheme( $url, $scheme );
+
+ if ( $path && is_string( $path ) )
+ $url .= '/' . ltrim( $path, '/' );
+
+ /**
+ * Filters 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', 'rest', or null.
+ * @param int|null $blog_id Site ID, or null for the current site.
+ */
+ return apply_filters( 'home_url', $url, $path, $orig_scheme, $blog_id );
+}
+
+/**
+ * Retrieves the URL for the current site where WordPress application files
+ * (e.g. wp-blog-header.php or the wp-admin/ folder) are accessible.
+ *
+ * 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.
+ *
+ * @since 3.0.0
+ *
+ * @param string $path Optional. Path relative to the site URL. Default empty.
+ * @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 site_url( $path = '', $scheme = null ) {
+ return get_site_url( null, $path, $scheme );
+}
+
+/**
+ * Retrieves the URL for a given site where WordPress application files
+ * (e.g. wp-blog-header.php or the wp-admin/ folder) are accessible.
+ *
+ * Returns the 'site_url' option with the appropriate protocol, 'https' if
+ * is_ssl() and 'http' otherwise. If `$scheme` is 'http' or 'https',
+ * `is_ssl()` is overridden.
+ *
+ * @since 3.0.0
+ *
+ * @param int $blog_id Optional. Site ID. Default null (current site).
+ * @param string $path Optional. Path relative to the site URL. Default empty.
+ * @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' );
+ } else {
+ switch_to_blog( $blog_id );
+ $url = get_option( 'siteurl' );
+ restore_current_blog();
+ }
+
+ $url = set_url_scheme( $url, $scheme );
+
+ if ( $path && is_string( $path ) )
+ $url .= '/' . ltrim( $path, '/' );
+
+ /**
+ * Filters 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 Site ID, or null for the current site.
+ */
+ return apply_filters( 'site_url', $url, $path, $scheme, $blog_id );
+}
+
+/**
+ * Retrieves the URL to the admin area for the current site.
+ *
+ * @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 );
+}
+
+/**
+ * Retrieves the URL to the admin area for a given site.
+ *
+ * @since 3.0.0
+ *
+ * @param int $blog_id Optional. Site ID. Default null (current site).
+ * @param string $path Optional. Path relative to the admin URL. Default empty.
+ * @param string $scheme Optional. The scheme to use. Accepts 'http' or 'https',
+ * to force those schemes. Default 'admin', which obeys
+ * force_ssl_admin() and 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, '/' );
+
+ /**
+ * Filters 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 Site ID, or null for the current site.
+ */
+ return apply_filters( 'admin_url', $url, $path, $blog_id );
+}
+
+/**
+ * Retrieves the URL to the includes directory.
+ *
+ * @since 2.6.0
+ *
+ * @param string $path Optional. Path relative to the includes URL. Default empty.
+ * @param string $scheme Optional. Scheme to give the includes URL context. Accepts
+ * 'http', 'https', or 'relative'. Default null.
+ * @return string Includes URL link with optional path appended.
+ */
+function includes_url( $path = '', $scheme = null ) {
+ $url = site_url( '/' . WPINC . '/', $scheme );
+
+ if ( $path && is_string( $path ) )
+ $url .= ltrim($path, '/');
+
+ /**
+ * Filters 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 );
+}
+
+/**
+ * Retrieves the URL to the content directory.
+ *
+ * @since 2.6.0
+ *
+ * @param string $path Optional. Path relative to the content URL. Default empty.
+ * @return string Content URL link with optional path appended.
+ */
+function content_url( $path = '' ) {
+ $url = set_url_scheme( WP_CONTENT_URL );
+
+ if ( $path && is_string( $path ) )
+ $url .= '/' . ltrim($path, '/');
+
+ /**
+ * Filters the URL to the content directory.
+ *
+ * @since 2.8.0
+ *
+ * @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
+ * if no path is specified.
+ */
+ return apply_filters( 'content_url', $url, $path);
+}
+
+/**
+ * Retrieves 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. Extra path appended to the end of the URL, including
+ * the relative directory if $plugin is supplied. Default empty.
+ * @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 = '' ) {
+
+ $path = wp_normalize_path( $path );
+ $plugin = wp_normalize_path( $plugin );
+ $mu_plugin_dir = wp_normalize_path( WPMU_PLUGIN_DIR );
+
+ if ( !empty($plugin) && 0 === strpos($plugin, $mu_plugin_dir) )
+ $url = WPMU_PLUGIN_URL;
+ else
+ $url = WP_PLUGIN_URL;
+
+
+ $url = set_url_scheme( $url );
+
+ if ( !empty($plugin) && is_string($plugin) ) {
+ $folder = dirname(plugin_basename($plugin));
+ if ( '.' != $folder )
+ $url .= '/' . ltrim($folder, '/');
+ }
+
+ if ( $path && is_string( $path ) )
+ $url .= '/' . ltrim($path, '/');
+
+ /**
+ * Filters 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 );