wp-admin/includes/post.php:230Returns only allowed post data fields.
$post_dataarray|WP_Error|nulloptionalnullarray|WP_Errorfunction _wp_get_allowed_postdata( $post_data = null ) { if ( empty( $post_data ) ) { $post_data = $_POST; } // Pass through errors. if ( is_wp_error( $post_data ) ) { return $post_data; } return array_diff_key( $post_data, array_flip( array( 'meta_input', 'file', 'guid' ) ) );}Introduced in 5.0.1. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/post.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.