Walker_Nav_Menu_Edit::start_el( string $output, WP_Post $data_object, int $depth = 0, stdClass $args = null, int $current_object_id = 0 )

Compatibility

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

Parameters

$outputstring

Used to append additional content (passed by reference).

$data_objectWP_Post

Menu item data object.

$depthintoptional

Depth of menu item. Used for padding.Default: 0

$argsstdClassoptional

Not used.Default: null

$current_object_idintoptional

ID of the current menu item. Default 0.Default: 0

Performance profile

How much work a call to Walker_Nav_Menu_Edit::start_el() 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_term().

Scaling

Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions

434–502

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 567.

Plugin surface

1 hook

Third-party callbacks on 'wp_nav_menu_item_custom_fields' 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_term()called directly
• hookthird-party callbacksdo_action()called directly
• optionoption read or writeget_option()one call below Walker_Nav_Menu_Edit::start_el()

Further down the call graph this can also reach 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 Walker_Nav_Menu_Edit::start_el() can have, taken from its control-flow graph on PHP 8.5.

This body has more branch combinations than are worth enumerating, so the table covers the outcomes found first rather than every one that exists.

Hooks and filters fired · 1

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

1. 1
   do_action( wp_nav_menu_item_custom_fields )actionline 280 (+220 into the body)

   Fires just before the move buttons of a nav menu item in the menu editor.

Uses · 18

• esc_attr()Escaping for HTML attributes.
• get_term()Gets all term data from database by term ID.
• is_wp_error()Checks whether the given variable is a WordPress Error.
• get_post()Retrieves post data given a post ID or post object.
• get_the_title()Retrieves the post title.
• get_post_type_object()Retrieves a post type object by name.
• __()Retrieves the translation of $text.
• esc_html()Escaping for HTML blocks.
• _e()Displays translated text.
• wp_nonce_url()Retrieves URL with nonce added to URL query.
• add_query_arg()Retrieves a modified URL query string.
• remove_query_arg()Removes an item or items from a query string.

Source code

View on Trac ↗View on GitHub ↗

60	public function start_el( &$output, $data_object, $depth = 0, $args = null, $current_object_id = 0 ) {61		global $_wp_nav_menu_max_depth;62 63		// Restores the more descriptive, specific name for use within this method.64		$menu_item = $data_object;65 66		$_wp_nav_menu_max_depth = $depth > $_wp_nav_menu_max_depth ? $depth : $_wp_nav_menu_max_depth;67 68		ob_start();69		$item_id      = esc_attr( $menu_item->ID );70		$removed_args = array(71			'action',72			'customlink-tab',73			'edit-menu-item',74			'menu-item',75			'page-tab',76			'_wpnonce',77		);78 79		$original_title = false;80 81		if ( 'taxonomy' === $menu_item->type ) {82			$original_object = get_term( (int) $menu_item->object_id, $menu_item->object );83			if ( $original_object && ! is_wp_error( $original_object ) ) {84				$original_title = $original_object->name;85			}86		} elseif ( 'post_type' === $menu_item->type ) {87			$original_object = get_post( $menu_item->object_id );88			if ( $original_object ) {89				$original_title = get_the_title( $original_object->ID );90			}91		} elseif ( 'post_type_archive' === $menu_item->type ) {92			$original_object = get_post_type_object( $menu_item->object );93			if ( $original_object ) {94				$original_title = $original_object->labels->archives;95			}96		}97 98		$classes = array(99			'menu-item menu-item-depth-' . $depth,100			'menu-item-' . esc_attr( $menu_item->object ),101			'menu-item-edit-' . ( ( isset( $_GET['edit-menu-item'] ) && $item_id === $_GET['edit-menu-item'] ) ? 'active' : 'inactive' ),102		);103 104		$title = $menu_item->title;105 106		if ( ! empty( $menu_item->_invalid ) ) {107			$classes[] = 'menu-item-invalid';108			/* translators: %s: Title of an invalid menu item. */109			$title = sprintf( __( '%s (Invalid)' ), $menu_item->title );110		} elseif ( isset( $menu_item->post_status ) && 'draft' === $menu_item->post_status ) {111			$classes[] = 'pending';112			/* translators: %s: Title of a menu item in draft status. */113			$title = sprintf( __( '%s (Pending)' ), $menu_item->title );114		}115 116		$title = ( ! isset( $menu_item->label ) || '' === $menu_item->label ) ? $title : $menu_item->label;117 118		$submenu_text = '';119		if ( 0 === $depth ) {120			$submenu_text = 'style="display: none;"';121		}122 123		?>124		<li id="menu-item-<?php echo $item_id; ?>" class="<?php echo implode( ' ', $classes ); ?>">125			<div class="menu-item-bar">126				<div class="menu-item-handle">127					<label class="item-title" for="menu-item-checkbox-<?php echo $item_id; ?>">128						<input id="menu-item-checkbox-<?php echo $item_id; ?>" type="checkbox" class="menu-item-checkbox" data-menu-item-id="<?php echo $item_id; ?>" disabled="disabled" />129						<span class="menu-item-title"><?php echo esc_html( $title ); ?></span>130						<span class="is-submenu" <?php echo $submenu_text; ?>><?php _e( 'sub item' ); ?></span>131					</label>132					<span class="item-controls">133						<span class="item-type"><?php echo esc_html( $menu_item->type_label ); ?></span>134						<span class="item-order hide-if-js">135							<?php136							printf(137								'<a href="%s" class="item-move-up" aria-label="%s">&#8593;</a>',138								wp_nonce_url(139									add_query_arg(

Changelog

Introduced in 3.0.0. 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-walker-nav-menu-edit.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

Something wrong on this page? Report it and it gets fixed in the next regeneration.