wp-includes/post.php:2093Stores or returns a list of post type meta caps for map_meta_cap().
$capabilitiesstring[]optionalnullfunction _post_type_meta_capabilities( $capabilities = null ) { global $post_type_meta_caps; foreach ( $capabilities as $core => $custom ) { if ( in_array( $core, array( 'read_post', 'delete_post', 'edit_post' ), true ) ) { $post_type_meta_caps[ $custom ] = $core; } }}Introduced in 3.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/post.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.