From 55d7366c423cbbbaf5371d80806e9630e9fcdff2 Mon Sep 17 00:00:00 2001
From: ryan <ryan@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Tue, 26 Jul 2011 19:44:18 +0000
Subject: [PATCH] Recognize urls that start with a question mark as relative
 urls that do not require a scheme to be prepended. fixes #18260

git-svn-id: http://svn.automattic.com/wordpress/trunk@18469 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/formatting.php | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index b42f5e9e06..f6a9d6a0b1 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -2256,10 +2256,10 @@ function esc_url( $url, $protocols = null, $_context = 'display' ) {
 	$url = str_replace(';//', '://', $url);
 	/* If the URL doesn't appear to contain a scheme, we
 	 * presume it needs http:// appended (unless a relative
-	 * link starting with / or a php file).
+	 * link starting with /, # or ? or a php file).
 	 */
-	if ( strpos($url, ':') === false &&
-		substr( $url, 0, 1 ) != '/' && substr( $url, 0, 1 ) != '#' && !preg_match('/^[a-z0-9-]+?\.php/i', $url) )
+	if ( strpos($url, ':') === false && ! in_array( $url[0], array( '/', '#', '?' ) ) &&
+		! preg_match('/^[a-z0-9-]+?\.php/i', $url) )
 		$url = 'http://' . $url;
 
 	// Replace ampersands and single quotes only when displaying.