wp_ajax_menu_get_metabox()
- Since
- 3.1.0
- Source
wp-admin/includes/ajax-actions.php:1872
Compatibility
- WordPress
- since 3.1.0
- PHP
- 7.4–8.6-dev
- 6.7.7
- 6.8.8
- 6.9.7
- 7.0.4
- 7.1.0
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_menu_get_metabox() 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
- Trivial
- Scaling
- Constant
- Instructions
- 19–78
- Plugin surface
- 1 hook
- Called by
- 0
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 87.
Third-party callbacks on 'nav_menu_meta_box_object' run inside this call, and their cost is not bounded by anything here.
Nothing in core calls this; the cost is only what you spend yourself.
What it touches
- hookthird-party callbacks
apply_filters()called directly
Further down the call graph this can also reach query, 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 · 12 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_ajax_menu_get_metabox() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
current_user_can() | 19–31 | current_user_can(), wp_die() |
!current_user_can() | 22–34 | current_user_can(), wp_die(), wp_die() |
current_user_can() && isset($value) | 29–33 | current_user_can(), get_post_types(), wp_die() |
current_user_can() && isset($value) | 31–39 | current_user_can(), get_taxonomies(), wp_die() |
!current_user_can() && isset($value) | 32–36 | current_user_can(), wp_die(), get_post_types(), wp_die() |
!current_user_can() && isset($value) | 34–42 | current_user_can(), wp_die(), get_taxonomies(), wp_die() |
current_user_can() && !empty($value) && isset($items) | 59–67 | current_user_can(), apply_filters(), ob_start(), ob_get_clean(), replace-id(), wp_die() |
!current_user_can() && !empty($value) && isset($items) | 62–70 | current_user_can(), wp_die(), apply_filters(), ob_start(), ob_get_clean(), replace-id(), wp_die() |
current_user_can() && isset($value) && !empty($value) && isset($items) | 69 | current_user_can(), get_post_types(), apply_filters(), ob_start(), ob_get_clean(), replace-id(), wp_die() |
current_user_can() && isset($value) && !empty($value) && isset($items) | 71–75 | current_user_can(), get_taxonomies(), apply_filters(), ob_start(), ob_get_clean(), replace-id(), wp_die() |
!current_user_can() && isset($value) && !empty($value) && isset($items) | 72 | current_user_can(), wp_die(), get_post_types(), apply_filters(), ob_start(), ob_get_clean(), replace-id(), wp_die() |
!current_user_can() && isset($value) && !empty($value) && isset($items) | 74–78 | current_user_can(), wp_die(), get_taxonomies(), apply_filters(), ob_start(), ob_get_clean(), replace-id(), wp_die() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 87 instructions, 19–78 executed per call, 7 branches. The work does not change between versions.
An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.
Hooks and filters fired · 1
One hook fires while wp_ajax_menu_get_metabox() runs, in this order:
- apply_filters( nav_menu_meta_box_object )filterline 1893 (+21 into the body)
Filters whether a menu items meta box will be added for the current object type.
Uses · 6
- 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_types()Gets a list of all registered post type objects.
- get_taxonomies()Retrieves a list of registered taxonomy names or objects.
- apply_filters()Calls the callback functions that have been added to a filter hook.
- wp_json_encode()Encodes a variable into JSON, with some confidence checks.
Source code
function wp_ajax_menu_get_metabox() { if ( ! current_user_can( 'edit_theme_options' ) ) { wp_die( -1 ); } require_once ABSPATH . 'wp-admin/includes/nav-menu.php'; if ( isset( $_POST['item-type'] ) && 'post_type' === $_POST['item-type'] ) { $type = 'posttype'; $callback = 'wp_nav_menu_item_post_type_meta_box'; $items = (array) get_post_types( array( 'show_in_nav_menus' => true ), 'object' ); } elseif ( isset( $_POST['item-type'] ) && 'taxonomy' === $_POST['item-type'] ) { $type = 'taxonomy'; $callback = 'wp_nav_menu_item_taxonomy_meta_box'; $items = (array) get_taxonomies( array( 'show_ui' => true ), 'object' ); } if ( ! empty( $_POST['item-object'] ) && isset( $items[ $_POST['item-object'] ] ) ) { $menus_meta_box_object = $items[ $_POST['item-object'] ]; /** This filter is documented in wp-admin/includes/nav-menu.php */ $item = apply_filters( 'nav_menu_meta_box_object', $menus_meta_box_object ); $box_args = array( 'id' => 'add-' . $item->name, 'title' => $item->labels->name, 'callback' => $callback, 'args' => $item, ); ob_start(); $callback( null, $box_args ); $markup = ob_get_clean(); echo wp_json_encode( array( 'replace-id' => $type . '-' . $item->name, 'markup' => $markup, ) ); } wp_die();}Changelog
Introduced in 3.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
About this page
- Parsed data
- Generated from the wordpress-develop 6.7.7 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
- Something wrong on this page? Report it and it gets fixed in the next regeneration.