block_core_navigation_get_classic_menu_fallback_blocks( object $classic_nav_menu ): array
- Since
- 6.2.0
- Source
wp-includes/blocks/navigation.php:1879
Compatibility
Deprecated in WordPress 6.3.0. Use WP_Navigation_Fallback::get_classic_menu_fallback_blocks() instead.
- WordPress
- since 6.2.0
- 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.
Parameters
Return value
array- the normalized parsed blocks.
Performance profile
How much work a call to block_core_navigation_get_classic_menu_fallback_blocks() 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
- Scaling
- Scales with input
- Instructions
- 36–39
- Plugin surface
- None
- Called by
- 1
Reaches the database via get_posts().
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 48.
Nothing here hands control to plugin code.
1 place in core call this, so the cost is paid more often than your own code shows.
What it touches
- hookthird-party callbacks
do_action()one call below block_core_navigation_get_classic_menu_fallback_blocks() - querycontent query
get_posts()one call below block_core_navigation_get_classic_menu_fallback_blocks() - optionoption read or write
get_option()one call below block_core_navigation_get_classic_menu_fallback_blocks()
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 · 1 distinct outcome
One number would be a lie: the work depends on which branch runs. These are every distinct cost block_core_navigation_get_classic_menu_fallback_blocks() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 36–39 | _deprecated_function(), wp_get_nav_menu_items(), _wp_menu_item_classes_by_context(), block_core_navigation_parse_blocks_from_menu_items(), serialize_blocks() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 48 instructions, 36–39 executed per call, 5 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.
Uses · 5
- _deprecated_function()Marks a function as deprecated and inform when it has been used.
- wp_get_nav_menu_items()Retrieves all menu items of a navigation menu.
- _wp_menu_item_classes_by_context()Adds the class property classes for the current context, if applicable.
- block_core_navigation_parse_blocks_from_menu_items()Turns menu item data into a nested array of parsed blocks
- serialize_blocks()Returns a joined string of the aggregate serialization of the given parsed blocks.
Used by · 1
- block_core_navigation_maybe_use_classic_menu_fallback()If there's a classic menu then use it as a fallback.
Source code
function block_core_navigation_get_classic_menu_fallback_blocks( $classic_nav_menu ) { _deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::get_classic_menu_fallback_blocks' ); // BEGIN: Code that already exists in wp_nav_menu(). $menu_items = wp_get_nav_menu_items( $classic_nav_menu->term_id, array( 'update_post_term_cache' => false ) ); // Set up the $menu_item variables. _wp_menu_item_classes_by_context( $menu_items ); $sorted_menu_items = array(); foreach ( (array) $menu_items as $menu_item ) { $sorted_menu_items[ $menu_item->menu_order ] = $menu_item; } unset( $menu_items, $menu_item ); // END: Code that already exists in wp_nav_menu(). $menu_items_by_parent_id = array(); foreach ( $sorted_menu_items as $menu_item ) { $menu_items_by_parent_id[ $menu_item->menu_item_parent ][] = $menu_item; } $inner_blocks = block_core_navigation_parse_blocks_from_menu_items( $menu_items_by_parent_id[0] ?? array(), $menu_items_by_parent_id ); return serialize_blocks( $inner_blocks );}Changelog
Introduced in 6.2.0. 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 7.1.0 tag, from
src/wp-includes/blocks/navigation.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.