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

3234	 * @since 2.0.03235	 *3236	 * @param string[] $post_links Array of link URLs to be checked (passed by reference).3237	 * @param string[] $pung       Array of link URLs already pinged (passed by reference).3238	 * @param int      $post_id    The post ID.3239	 */3240	do_action_ref_array( 'pre_ping', array( &$post_links, &$pung, $post->ID ) );3241 3242	foreach ( (array) $post_links as $pagelinkedto ) {3243		$pingback_server_url = discover_pingback_server_uri( $pagelinkedto );3244 3245		if ( $pingback_server_url ) {3246			// Allow an additional 60 seconds for each pingback to complete.