From 0c2daa617d3e6a400798fa88694c69587f0ace5a Mon Sep 17 00:00:00 2001
From: Ryan Boren <ryan@git.wordpress.org>
Date: Sun, 6 Nov 2005 04:02:12 +0000
Subject: [PATCH] Protection against multiple trackbacks in one bunch from
 markjaquith.  fixes #1817

git-svn-id: https://develop.svn.wordpress.org/trunk@2996 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/functions-post.php | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/wp-includes/functions-post.php b/wp-includes/functions-post.php
index 6da26fbdac..e90ddedcc7 100644
--- a/wp-includes/functions-post.php
+++ b/wp-includes/functions-post.php
@@ -622,8 +622,10 @@ function do_trackbacks($post_id) {
 
 	if ($to_ping) : foreach ($to_ping as $tb_ping) :
 		$tb_ping = trim($tb_ping);
-		if ( !in_array($tb_ping, $pinged) )
-		 trackback($tb_ping, $post_title, $excerpt, $post_id);
+		if ( !in_array($tb_ping, $pinged) ) {
+			trackback($tb_ping, $post_title, $excerpt, $post_id);
+			$pinged[] = $tb_ping;
+		}
 	endforeach; endif;
 }