From 5c75f4cc75fc829b1d3a2e161e9f635271d13133 Mon Sep 17 00:00:00 2001
From: Peter Westwood <westi@git.wordpress.org>
Date: Wed, 19 Dec 2007 17:34:15 +0000
Subject: [PATCH] Don't create empty tags. Fixes #5412 props ionfish

git-svn-id: https://develop.svn.wordpress.org/trunk@6407 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/post.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wp-includes/post.php b/wp-includes/post.php
index a7a713d35a..f7d31176bf 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -1187,7 +1187,7 @@ function wp_set_post_tags( $post_id = 0, $tags = '', $append = false ) {
 
 	if ( empty($tags) )
 		$tags = array();
-	$tags = (is_array($tags)) ? $tags : explode( ',', $tags );
+	$tags = (is_array($tags)) ? $tags : explode( ',', trim($tags, " \s\n\t\r\0\x0B,") );
 	wp_set_object_terms($post_id, $tags, 'post_tag', $append);
 }