WP_Posts_List_Table::_page_rows( array $children_pages, int $count, int $parent_page, int $level, int $pagenum, int $per_page, array $to_display )

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$children_pagesarray

$countint

$parent_pageint

$levelint

$pagenumint

$per_pageint

$to_displayarray

List of pages to be displayed. Passed by reference.

Performance profile

How much work a call to WP_Posts_List_Table::_page_rows() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Heavy

Reaches the database via get_post().

Scaling

Scales with input

The body loops, so the work grows with what you pass in.

Instructions

10–20

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 76.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

2

2 places in core call this, so the cost is paid more often than your own code shows.

What it touches

• querycontent queryget_post()called directly

Further down the call graph this can also reach hook, option, cache, serialize and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 1 distinct outcome

One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_Posts_List_Table::_page_rows() can have, taken from its control-flow graph on PHP 8.5.

Uses · 2

• get_post()Retrieves post data given a post ID or post object.
• WP_Posts_List_Table::_page_rows()Displays the nested hierarchy of sub-pages together with paging support, based on a top level page ID.

Used by · 2

• WP_Posts_List_Table::_display_rows_hierarchical()
• WP_Posts_List_Table::_page_rows()Displays the nested hierarchy of sub-pages together with paging support, based on a top level page ID.

Source code

View on Trac ↗View on GitHub ↗

959	private function _page_rows( &$children_pages, &$count, $parent_page, $level, $pagenum, $per_page, &$to_display ) {960		if ( ! isset( $children_pages[ $parent_page ] ) ) {961			return;962		}963 964		$start = ( $pagenum - 1 ) * $per_page;965		$end   = $start + $per_page;966 967		foreach ( $children_pages[ $parent_page ] as $page ) {968			if ( $count >= $end ) {969				break;970			}971 972			// If the page starts in a subtree, print the parents.973			if ( $count === $start && $page->post_parent > 0 ) {974				$my_parents = array();975				$my_parent  = $page->post_parent;976 977				while ( $my_parent ) {978					// Get the ID from the list or the attribute if my_parent is an object.979					$parent_id = $my_parent;980 981					if ( is_object( $my_parent ) ) {982						$parent_id = $my_parent->ID;983					}984 985					$my_parent    = get_post( $parent_id );986					$my_parents[] = $my_parent;987 988					if ( ! $my_parent->post_parent ) {989						break;990					}991 992					$my_parent = $my_parent->post_parent;993				}994 995				$num_parents = count( $my_parents );996 997				while ( $my_parent = array_pop( $my_parents ) ) {998					$to_display[ $my_parent->ID ] = $level - $num_parents;999					--$num_parents;1000				}1001			}1002 1003			if ( $count >= $start ) {1004				$to_display[ $page->ID ] = $level;1005			}1006 1007			++$count;1008 1009			$this->_page_rows( $children_pages, $count, $page->ID, $level + 1, $pagenum, $per_page, $to_display );1010		}1011 1012		unset( $children_pages[ $parent_page ] ); // Required in order to keep track of orphans.1013	}

Changelog

Introduced in 4.2.0. Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 7.1.0 tag, from src/wp-admin/includes/class-wp-posts-list-table.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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