wp_ajax_add_menu_item()

Compatibility

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

Performance profile

How much work a call to wp_ajax_add_menu_item() 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 how much data it finds.

Instructions

46–73

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 155.

Plugin surface

1 hook

Third-party callbacks on 'wp_edit_nav_menu_walker' run inside this call, and their cost is not bounded by anything here.

Called by

0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

• querycontent queryget_post()called directly
• hookthird-party callbacksapply_filters()called directly

Further down the call graph this can also reach 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 · 16 distinct outcomes

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

Hooks and filters fired · 1

One hook fires while wp_ajax_add_menu_item() runs, in this order:

1. 1
   apply_filters( wp_edit_nav_menu_walker )filterline 1609 (+64 into the body)

   Filters the Walker class used when adding nav menu items.

Uses · 12

• check_ajax_referer()Verifies the Ajax request to prevent processing requests external of the blog.
• current_user_can()Returns whether the current user has the specified capability.
• wp_die()Kills WordPress execution and displays HTML page with an error message.
• get_post()Retrieves post data given a post ID or post object.
• get_post_type_object()Retrieves a post type object by name.
• get_term()Gets all term data from database by term ID.
• wp_save_nav_menu_items()Save posted nav menu item data.
• is_wp_error()Checks whether the given variable is a WordPress Error.
• wp_setup_nav_menu_item()Decorates a menu item object with the shared navigation menu item properties.
• __()Retrieves the translation of $text.
• apply_filters()Calls the callback functions that have been added to a filter hook.
• walk_nav_menu_tree()Retrieves the HTML list content for nav menu items.

Source code

View on Trac ↗View on GitHub ↗

1545function wp_ajax_add_menu_item() {1546	check_ajax_referer( 'add-menu_item', 'menu-settings-column-nonce' );1547 1548	if ( ! current_user_can( 'edit_theme_options' ) ) {1549		wp_die( -1 );1550	}1551 1552	require_once ABSPATH . 'wp-admin/includes/nav-menu.php';1553 1554	/*1555	 * For performance reasons, we omit some object properties from the checklist.1556	 * The following is a hacky way to restore them when adding non-custom items.1557	 */1558	$menu_items_data = array();1559 1560	foreach ( (array) $_POST['menu-item'] as $menu_item_data ) {1561		if (1562			! empty( $menu_item_data['menu-item-type'] ) &&1563			'custom' !== $menu_item_data['menu-item-type'] &&1564			! empty( $menu_item_data['menu-item-object-id'] )1565		) {1566			switch ( $menu_item_data['menu-item-type'] ) {1567				case 'post_type':1568					$_object = get_post( $menu_item_data['menu-item-object-id'] );1569					break;1570 1571				case 'post_type_archive':1572					$_object = get_post_type_object( $menu_item_data['menu-item-object'] );1573					break;1574 1575				case 'taxonomy':1576					$_object = get_term( $menu_item_data['menu-item-object-id'], $menu_item_data['menu-item-object'] );1577					break;1578			}1579 1580			$_menu_items = array_map( 'wp_setup_nav_menu_item', array( $_object ) );1581			$_menu_item  = reset( $_menu_items );1582 1583			// Restore the missing menu item properties.1584			$menu_item_data['menu-item-description'] = $_menu_item->description;1585		}1586 1587		$menu_items_data[] = $menu_item_data;1588	}1589 1590	$item_ids = wp_save_nav_menu_items( 0, $menu_items_data );1591	if ( is_wp_error( $item_ids ) ) {1592		wp_die( 0 );1593	}1594 1595	$menu_items = array();1596 1597	foreach ( (array) $item_ids as $menu_item_id ) {1598		$menu_object = get_post( $menu_item_id );1599 1600		if ( ! empty( $menu_object->ID ) ) {1601			$menu_object        = wp_setup_nav_menu_item( $menu_object );1602			$menu_object->title = empty( $menu_object->title ) ? __( 'Menu Item' ) : $menu_object->title;1603			$menu_object->label = $menu_object->title; // Don't show "(pending)" in ajax-added items.1604			$menu_items[]       = $menu_object;1605		}1606	}1607 1608	/** This filter is documented in wp-admin/includes/nav-menu.php */1609	$walker_class_name = apply_filters( 'wp_edit_nav_menu_walker', 'Walker_Nav_Menu_Edit', $_POST['menu'] );1610 1611	if ( ! class_exists( $walker_class_name ) ) {1612		wp_die( 0 );1613	}1614 1615	if ( ! empty( $menu_items ) ) {1616		$args = array(1617			'after'       => '',1618			'before'      => '',1619			'link_after'  => '',1620			'link_before' => '',1621			'walker'      => new $walker_class_name(),1622		);1623 1624		echo walk_nav_menu_tree( $menu_items, 0, (object) $args );

Changelog

Introduced in 3.1.0. 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/ajax-actions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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