name : class-walker-page.php <?php /** * Post API: Walker_Page class * * @package WordPress * @subpackage Template * @since 4.4.0 */ /** * Core walker class used to create an HTML list of pages. * * @since 2.1.0 * * @see Walker */ class Walker_Page extends Walker { /** * What the class handles. * * @since 2.1.0 * @var string * * @see Walker::$tree_type */ public $tree_type = 'page'; /** * Database fields to use. * * @since 2.1.0 * @var array * * @see Walker::$db_fields * @todo Decouple this. */ public $db_fields = array( 'parent' => 'post_parent', 'id' => 'ID' ); /** * Outputs the beginning of the current level in the tree before elements are output. * * @since 2.1.0 * * @see Walker::start_lvl() * * @param string $output Used to append additional content (passed by reference). * @param int $depth Optional. Depth of page. Used for padding. Default 0. * @param array $args Optional. Arguments for outputting the next level. * Default empty array. */ public function start_lvl( &$output, $depth = 0, $args = array() ) { if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) { $t = "\t"; $n = "\n"; } else { $t = ''; $n = ''; } $indent = str_repeat( $t, $depth ); $output .= "{$n}{$indent}<ul class='children'>{$n}"; } /** * Outputs the end of the current level in the tree after elements are output. * * @since 2.1.0 * * @see Walker::end_lvl() * * @param string $output Used to append additional content (passed by reference). * @param int $depth Optional. Depth of page. Used for padding. Default 0. * @param array $args Optional. Arguments for outputting the end of the current level. * Default empty array. */ public function end_lvl( &$output, $depth = 0, $args = array() ) { if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) { $t = "\t"; $n = "\n"; } else { $t = ''; $n = ''; } $indent = str_repeat( $t, $depth ); $output .= "{$indent}</ul>{$n}"; } /** * Outputs the beginning of the current element in the tree. * * @see Walker::start_el() * @since 2.1.0 * * @param string $output Used to append additional content. Passed by reference. * @param WP_Post $page Page data object. * @param int $depth Optional. Depth of page. Used for padding. Default 0. * @param array $args Optional. Array of arguments. Default empty array. * @param int $current_page Optional. Page ID. Default 0. */ public function start_el( &$output, $page, $depth = 0, $args = array(), $current_page = 0 ) { if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) { $t = "\t"; $n = "\n"; } else { $t = ''; $n = ''; } if ( $depth ) { $indent = str_repeat( $t, $depth ); } else { $indent = ''; } $css_class = array( 'page_item', 'page-item-' . $page->ID ); if ( isset( $args['pages_with_children'][ $page->ID ] ) ) { $css_class[] = 'page_item_has_children'; } if ( ! empty( $current_page ) ) { $_current_page = get_post( $current_page ); if ( $_current_page && in_array( $page->ID, $_current_page->ancestors ) ) { $css_class[] = 'current_page_ancestor'; } if ( $page->ID == $current_page ) { $css_class[] = 'current_page_item'; } elseif ( $_current_page && $page->ID == $_current_page->post_parent ) { $css_class[] = 'current_page_parent'; } } elseif ( $page->ID == get_option('page_for_posts') ) { $css_class[] = 'current_page_parent'; } /** * Filters the list of CSS classes to include with each page item in the list. * * @since 2.8.0 * * @see wp_list_pages() * * @param array $css_class An array of CSS classes to be applied * to each list item. * @param WP_Post $page Page data object. * @param int $depth Depth of page, used for padding. * @param array $args An array of arguments. * @param int $current_page ID of the current page. */ $css_classes = implode( ' ', apply_filters( 'page_css_class', $css_class, $page, $depth, $args, $current_page ) ); if ( '' === $page->post_title ) { /* translators: %d: ID of a post */ $page->post_title = sprintf( __( '#%d (no title)' ), $page->ID ); } $args['link_before'] = empty( $args['link_before'] ) ? '' : $args['link_before']; $args['link_after'] = empty( $args['link_after'] ) ? '' : $args['link_after']; $atts = array(); $atts['href'] = get_permalink( $page->ID ); /** * Filters the HTML attributes applied to a page menu item's anchor element. * * @since 4.8.0 * * @param array $atts { * The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored. * * @type string $href The href attribute. * } * @param WP_Post $page Page data object. * @param int $depth Depth of page, used for padding. * @param array $args An array of arguments. * @param int $current_page ID of the current page. */ $atts = apply_filters( 'page_menu_link_attributes', $atts, $page, $depth, $args, $current_page ); $attributes = ''; foreach ( $atts as $attr => $value ) { if ( ! empty( $value ) ) { $value = esc_attr( $value ); $attributes .= ' ' . $attr . '="' . $value . '"'; } } $output .= $indent . sprintf( '<li class="%s"><a%s>%s%s%s</a>', $css_classes, $attributes, $args['link_before'], /** This filter is documented in wp-includes/post-template.php */ apply_filters( 'the_title', $page->post_title, $page->ID ), $args['link_after'] ); if ( ! empty( $args['show_date'] ) ) { if ( 'modified' == $args['show_date'] ) { $time = $page->post_modified; } else { $time = $page->post_date; } $date_format = empty( $args['date_format'] ) ? '' : $args['date_format']; $output .= " " . mysql2date( $date_format, $time ); } } /** * Outputs the end of the current element in the tree. * * @since 2.1.0 * * @see Walker::end_el() * * @param string $output Used to append additional content. Passed by reference. * @param WP_Post $page Page data object. Not used. * @param int $depth Optional. Depth of page. Default 0 (unused). * @param array $args Optional. Array of arguments. Default empty array. */ public function end_el( &$output, $page, $depth = 0, $args = array() ) { if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) { $t = "\t"; $n = "\n"; } else { $t = ''; $n = ''; } $output .= "</li>{$n}"; } }