wp-includes/comment.php:3282Performs all pingbacks.
function do_all_pingbacks() { $pings = get_posts( array( 'post_type' => get_post_types(), 'suppress_filters' => false, 'nopaging' => true, 'meta_key' => '_pingme', 'fields' => 'ids', ) ); foreach ( $pings as $ping ) { delete_post_meta( $ping, '_pingme' ); pingback( null, $ping ); }}Introduced in 5.6.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/comment.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.