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Description

Retrieves or displays a list of pages (or hierarchical post type items) in list (li) format.

Usage

$void|string = wp_list_pages( $args );

Parameters

$args

( array|string ) optional – { Optional. Array or string of arguments to generate a list of pages. See get_pages() for additional arguments.

$child_of

( int ) optional – Display only the sub-pages of a single page by ID. Default 0 (all pages).

$authors

( string ) optional – Comma-separated list of author IDs. Default empty (all authors).

$date_format

( string ) optional – PHP date format to use for the listed pages. Relies on the 'show_date' parameter. Default is the value of 'date_format' option.

$depth

( int ) optional – Number of levels in the hierarchy of pages to include in the generated list. Accepts -1 (any depth), 0 (all pages), 1 (top-level pages only), and n (pages to the given n depth). Default 0.

$echo

( bool ) optional – Whether or not to echo the list of pages. Default true.

$exclude

( string ) optional – Comma-separated list of page IDs to exclude. Default empty.

$include

( array ) optional – Comma-separated list of page IDs to include. Default empty.

$link_after

( string ) optional – Text or HTML to follow the page link label. Default null.

$link_before

( string ) optional – Text or HTML to precede the page link label. Default null.

$post_type

( string ) optional – Post type to query for. Default 'page'.

$post_status

( string|array ) optional – Comma-separated list or array of post statuses to include. Default 'publish'.

$show_date

( string ) optional – Whether to display the page publish or modified date for each page. Accepts 'modified' or any other value. An empty value hides the date. Default empty.

$sort_column

( string ) optional – Comma-separated list of column names to sort the pages by. Accepts 'post_author', 'post_date', 'post_title', 'post_name', 'post_modified', 'post_modified_gmt', 'menu_order', 'post_parent', 'ID', 'rand', or 'comment_count'. Default 'post_title'.

$title_li

( string ) optional – List heading. Passing a null or empty value will result in no heading, and the list will not be wrapped with unordered list <ul> tags. Default 'Pages'.

$item_spacing

( string ) optional – Whether to preserve whitespace within the menu's HTML. Accepts 'preserve' or 'discard'. Default 'preserve'.

$walker

( Walker ) optional – Walker instance to use for listing pages. Default empty which results in a Walker_Page instance being used. }

Returns

void|string Void if 'echo' argument is true, HTML list of pages if 'echo' is false.

Source

File name: wordpress/wp-includes/post-template.php
Lines:

function wp_list_pages( $args = '' ) {
  $defaults = array(
    'depth'        => 0,
    'show_date'    => '',
    'date_format'  => get_option( 'date_format' ),
    'child_of'     => 0,
    'exclude'      => '',
    'title_li'     => __( 'Pages' ),
    'echo'         => 1,
    'authors'      => '',
    'sort_column'  => 'menu_order, post_title',
    'link_before'  => '',
    'link_after'   => '',
    'item_spacing' => 'preserve',
    'walker'       => '',
  );

  $parsed_args = wp_parse_args( $args, $defaults );

  if ( ! in_array( $parsed_args['item_spacing'], array( 'preserve', 'discard' ), true ) ) {
    // Invalid value, fall back to default.
    $parsed_args['item_spacing'] = $defaults['item_spacing'];
  }

  $output       = '';
  $current_page = 0;

  // Sanitize, mostly to keep spaces out.
  $parsed_args['exclude'] = preg_replace( '/[^0-9,]/', '', $parsed_args['exclude'] );

  // Allow plugins to filter an array of excluded pages (but don't put a nullstring into the array).
  $exclude_array = ( $parsed_args['exclude'] ) ? explode( ',', $parsed_args['exclude'] ) : array();

  
/**
 * Filters the array of pages to exclude from the pages list.
 *
 * @since 2.1.0
 *
 * @param string[] $exclude_array An array of page IDs to exclude.
 */
  $parsed_args['exclude'] = implode( ',', apply_filters( 'wp_list_pages_excludes', $exclude_array ) );

  $parsed_args['hierarchical'] = 0;

  // Query pages.
  $pages = get_pages( $parsed_args );

  if ( ! empty( $pages ) ) {
    if ( $parsed_args['title_li'] ) {
      $output .= '<li class="pagenav">' . $parsed_args['title_li'] . '<ul>';
    }
    global $wp_query;
    if ( is_page() || is_attachment() || $wp_query->is_posts_page ) {
      $current_page = get_queried_object_id();
    } elseif ( is_singular() ) {
      $queried_object = get_queried_object();
      if ( is_post_type_hierarchical( $queried_object->post_type ) ) {
        $current_page = $queried_object->ID;
      }
    }

    $output .= walk_page_tree( $pages, $parsed_args['depth'], $current_page, $parsed_args );

    if ( $parsed_args['title_li'] ) {
      $output .= '</ul></li>';
    }
  }

  
/**
 * Filters the HTML output of the pages to list.
 *
 * @since 1.5.1
 * @since 4.4.0 `$pages` added as arguments.
 *
 * @see wp_list_pages()
 *
 * @param string    $output      HTML output of the pages list.
 * @param array     $parsed_args An array of page-listing arguments. See wp_list_pages()
 *                               for information on accepted arguments.
 * @param WP_Post[] $pages       Array of the page objects.
 */
  $html = apply_filters( 'wp_list_pages', $output, $parsed_args, $pages );

  if ( $parsed_args['echo'] ) {
    echo $html;
  } else {
    return $html;
  }
}
 

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