do_action_ref_array( 'pre_ping', string[] $post_links, string[] $pung, int $post_id )

3572	 * @since 2.0.03573	 *3574	 * @param string[] $post_links Array of link URLs to be checked (passed by reference).3575	 * @param string[] $pung       Array of link URLs already pinged (passed by reference).3576	 * @param int      $post_id    The post ID.3577	 */3578	do_action_ref_array( 'pre_ping', array( &$post_links, &$pung, $post->ID ) );3579 3580	foreach ( (array) $post_links as $pagelinkedto ) {3581		$pingback_server_url = discover_pingback_server_uri( $pagelinkedto );3582 3583		if ( $pingback_server_url ) {3584			// Allow an additional 60 seconds for each pingback to complete.