wp_post_revision_meta_keys( string $post_type ): array

Compatibility

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

Parameters

$post_typestring

The post type being revisioned.

Return value

array

An array of meta keys to be revisioned.

Performance profile

How much work a call to wp_post_revision_meta_keys() 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

Light

Touches nothing outside its own arguments.

Scaling

Scales with input

The body loops, so the work grows with what you pass in.

Instructions

26–27

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 33.

Plugin surface

1 hook

Third-party callbacks on 'wp_post_revision_meta_keys' run inside this call, and their cost is not bounded by anything here.

Called by

6

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

What it touches

• hookthird-party callbacksapply_filters()called directly

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

Hooks and filters fired · 1

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

1. 1
   apply_filters( wp_post_revision_meta_keys )filterline 598 (+24 into the body)

   Filter the list of post meta keys to be revisioned.

Uses · 2

• get_registered_meta_keys()Retrieves a list of registered metadata args for an object type, keyed by their meta keys.
• apply_filters()Calls the callback functions that have been added to a filter hook.

Used by · 6

• WP_REST_Autosaves_Controller::create_post_autosave()Creates autosave for the specified post.
• _wp_preview_meta_filter()Filters preview post meta retrieval to get values from the autosave.
• wp_autosave_post_revisioned_meta_fields()Autosaves the revisioned meta fields.
• wp_check_revisioned_meta_fields_have_changed()Check whether revisioned post meta fields have changed.
• wp_restore_post_revision_meta()Restore the revisioned meta values for a post.
• wp_save_revisioned_meta_fields()Save the revisioned meta fields.

Source code

View on Trac ↗View on GitHub ↗

574function wp_post_revision_meta_keys( $post_type ) {575	$registered_meta = array_merge(576		get_registered_meta_keys( 'post' ),577		get_registered_meta_keys( 'post', $post_type )578	);579 580	$wp_revisioned_meta_keys = array();581 582	foreach ( $registered_meta as $name => $args ) {583		if ( $args['revisions_enabled'] ) {584			$wp_revisioned_meta_keys[ $name ] = true;585		}586	}587 588	$wp_revisioned_meta_keys = array_keys( $wp_revisioned_meta_keys );589 590	/**591	 * Filter the list of post meta keys to be revisioned.592	 *593	 * @since 6.4.0594	 *595	 * @param array  $keys      An array of meta fields to be revisioned.596	 * @param string $post_type The post type being revisioned.597	 */598	return apply_filters( 'wp_post_revision_meta_keys', $wp_revisioned_meta_keys, $post_type );599}

Changelog

Introduced in 6.4.0. 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/revision.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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