WP_Navigation_Block_Renderer::get_inner_blocks( array $attributes, WP_Block $block ): WP_Block_List

Compatibility

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

Parameters

$attributesarray

The block attributes.

$blockWP_Block

The parsed block.

Return value

WP_Block_List

Returns the inner blocks for the navigation block.

Performance profile

How much work a call to WP_Navigation_Block_Renderer::get_inner_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

Trivial

Touches nothing outside its own arguments.

Scaling

Constant

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

Instructions

22–54

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 54.

Plugin surface

1 hook

Third-party callbacks on 'block_core_navigation_render_inner_blocks' 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

• hookthird-party callbacksapply_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 · 24 distinct outcomes

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

Hooks and filters fired · 1

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

1. 1
   apply_filters( block_core_navigation_render_inner_blocks )filterline 559 (+41 into the body)

   Filter navigation block $inner_blocks.

Uses · 7

• block_core_navigation_get_menu_items_at_location()Returns the menu items for a WordPress menu location.
• block_core_navigation_get_inner_blocks_from_unstable_location()Gets the inner blocks for the navigation block from the unstable location attribute.
• apply_filters()Calls the callback functions that have been added to a filter hook.
• block_core_navigation_get_post_ids()Iterate through all inner blocks recursively and get navigation link block's post IDs.
• _prime_post_caches()Adds any posts from the given IDs to the cache that do not already exist in cache.
• static::get_inner_blocks_from_navigation_post()
• static::get_inner_blocks_from_fallback()

Source code

View on Trac ↗View on GitHub ↗

518	private static function get_inner_blocks( $attributes, $block ) {519		$inner_blocks = $block->inner_blocks;520 521		// Ensure that blocks saved with the legacy ref attribute name (navigationMenuId) continue to render.522		if ( array_key_exists( 'navigationMenuId', $attributes ) ) {523			$attributes['ref'] = $attributes['navigationMenuId'];524		}525 526		// If:527		// - the gutenberg plugin is active528		// - `__unstableLocation` is defined529		// - we have menu items at the defined location530		// - we don't have a relationship to a `wp_navigation` Post (via `ref`).531		// ...then create inner blocks from the classic menu assigned to that location.532		if (533			defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN &&534			array_key_exists( '__unstableLocation', $attributes ) &&535			! array_key_exists( 'ref', $attributes ) &&536			! empty( block_core_navigation_get_menu_items_at_location( $attributes['__unstableLocation'] ) )537		) {538			$inner_blocks = block_core_navigation_get_inner_blocks_from_unstable_location( $attributes );539		}540 541		// Load inner blocks from the navigation post.542		if ( array_key_exists( 'ref', $attributes ) ) {543			$inner_blocks = static::get_inner_blocks_from_navigation_post( $attributes );544		}545 546		// If there are no inner blocks then fallback to rendering an appropriate fallback.547		if ( empty( $inner_blocks ) ) {548			$inner_blocks = static::get_inner_blocks_from_fallback( $attributes );549		}550 551		/**552		 * Filter navigation block $inner_blocks.553		 * Allows modification of a navigation block menu items.554		 *555		 * @since 6.1.0556		 *557		 * @param \WP_Block_List $inner_blocks558		 */559		$inner_blocks = apply_filters( 'block_core_navigation_render_inner_blocks', $inner_blocks );560 561		$post_ids = block_core_navigation_get_post_ids( $inner_blocks );562		if ( $post_ids ) {563			_prime_post_caches( $post_ids, false, false );564		}565 566		return $inner_blocks;567	}

Changelog

Introduced in 6.5.0. 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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