block_core_navigation_get_classic_menu_fallback(): object

Compatibility

Deprecated in WordPress 6.3.0. Use WP_Navigation_Fallback::get_classic_menu_fallback() instead.

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

Return value

object

WP_Term The classic navigation.

Performance profile

How much work a call to block_core_navigation_get_classic_menu_fallback() 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_terms().

Scaling

Constant

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

Instructions

6

Executed per call on PHP 8.5. The body compiles to 48.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

1

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

What it touches

• hookthird-party callbacksdo_action()one call below block_core_navigation_get_classic_menu_fallback()
• querycontent queryget_terms()one call below block_core_navigation_get_classic_menu_fallback()

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 · 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() can have, taken from its control-flow graph on PHP 8.5.

Uses · 5

• _deprecated_function()Marks a function as deprecated and inform when it has been used.
• wp_get_nav_menus()Returns all navigation menu objects.
• is_wp_error()Checks whether the given variable is a WordPress Error.
• get_nav_menu_locations()Retrieves all registered navigation menu locations and the menus assigned to them.
• wp_get_nav_menu_object()Returns a navigation menu object.

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

View on Trac ↗View on GitHub ↗

1832function block_core_navigation_get_classic_menu_fallback() {1833 1834	_deprecated_function( __FUNCTION__, '6.3.0', 'WP_Navigation_Fallback::get_classic_menu_fallback' );1835 1836	$classic_nav_menus = wp_get_nav_menus();1837 1838	// If menus exist.1839	if ( $classic_nav_menus && ! is_wp_error( $classic_nav_menus ) ) {1840		// Handles simple use case where user has a classic menu and switches to a block theme.1841 1842		// Returns the menu assigned to location `primary`.1843		$locations = get_nav_menu_locations();1844		if ( isset( $locations['primary'] ) ) {1845			$primary_menu = wp_get_nav_menu_object( $locations['primary'] );1846			if ( $primary_menu ) {1847				return $primary_menu;1848			}1849		}1850 1851		// Returns a menu if `primary` is its slug.1852		foreach ( $classic_nav_menus as $classic_nav_menu ) {1853			if ( 'primary' === $classic_nav_menu->slug ) {1854				return $classic_nav_menu;1855			}1856		}1857 1858		// Otherwise return the most recently created classic menu.1859		usort(1860			$classic_nav_menus,1861			static function ( $a, $b ) {1862				return $b->term_id - $a->term_id;1863			}1864		);1865		return $classic_nav_menus[0];1866	}1867}

Changelog

Introduced in 6.2.0. 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-includes/blocks/navigation.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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