Parameters
$pages
arrayrequired$pagenum
intoptionalDefault:
1
$per_page
intoptionalDefault:
20
Source
private function _display_rows_hierarchical( $pages, $pagenum = 1, $per_page = 20 ) {
global $wpdb;
$level = 0;
if ( ! $pages ) {
$pages = get_pages( array( 'sort_column' => 'menu_order' ) );
if ( ! $pages ) {
return;
}
}
/*
* Arrange pages into two parts: top level pages and children_pages.
* children_pages is two dimensional array. Example:
* children_pages[10][] contains all sub-pages whose parent is 10.
* It only takes O( N ) to arrange this and it takes O( 1 ) for subsequent lookup operations
* If searching, ignore hierarchy and treat everything as top level
*/
if ( empty( $_REQUEST['s'] ) ) {
$top_level_pages = array();
$children_pages = array();
foreach ( $pages as $page ) {
// Catch and repair bad pages.
if ( $page->post_parent === $page->ID ) {
$page->post_parent = 0;
$wpdb->update( $wpdb->posts, array( 'post_parent' => 0 ), array( 'ID' => $page->ID ) );
clean_post_cache( $page );
}
if ( $page->post_parent > 0 ) {
$children_pages[ $page->post_parent ][] = $page;
} else {
$top_level_pages[] = $page;
}
}
$pages = &$top_level_pages;
}
$count = 0;
$start = ( $pagenum - 1 ) * $per_page;
$end = $start + $per_page;
$to_display = array();
foreach ( $pages as $page ) {
if ( $count >= $end ) {
break;
}
if ( $count >= $start ) {
$to_display[ $page->ID ] = $level;
}
++$count;
if ( isset( $children_pages ) ) {
$this->_page_rows( $children_pages, $count, $page->ID, $level + 1, $pagenum, $per_page, $to_display );
}
}
// If it is the last pagenum and there are orphaned pages, display them with paging as well.
if ( isset( $children_pages ) && $count < $end ) {
foreach ( $children_pages as $orphans ) {
foreach ( $orphans as $op ) {
if ( $count >= $end ) {
break;
}
if ( $count >= $start ) {
$to_display[ $op->ID ] = 0;
}
++$count;
}
}
}
$ids = array_keys( $to_display );
_prime_post_caches( $ids );
$_posts = array_map( 'get_post', $ids );
update_post_author_caches( $_posts );
if ( ! isset( $GLOBALS['post'] ) ) {
$GLOBALS['post'] = reset( $ids );
}
foreach ( $to_display as $page_id => $level ) {
echo "\t";
$this->single_row( $page_id, $level );
}
}
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