From b6af00292d2cc95d6e8913601213a02e4f830ef9 Mon Sep 17 00:00:00 2001
From: Jakub Zalas <jakub@zalas.pl>
Date: Sat, 21 Mar 2015 22:51:32 +0000
Subject: [PATCH] [DomCrawler] Improve namespace discovery performance

Up until now xpath axes (child::*, descendant-or-self::** etc) were considered namespaces.
As a result, far too many xpath queries were being executed while namespace discovery.
---
 src/Symfony/Component/DomCrawler/Crawler.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Symfony/Component/DomCrawler/Crawler.php b/src/Symfony/Component/DomCrawler/Crawler.php
index f51c56a302264..e8f6c8d8116ca 100644
--- a/src/Symfony/Component/DomCrawler/Crawler.php
+++ b/src/Symfony/Component/DomCrawler/Crawler.php
@@ -1027,7 +1027,7 @@ private function discoverNamespace(\DOMXPath $domxpath, $prefix)
      */
     private function findNamespacePrefixes($xpath)
     {
-        if (preg_match_all('/(?P<prefix>[a-z_][a-z_0-9\-\.]*):[^"\/]/i', $xpath, $matches)) {
+        if (preg_match_all('/(?P<prefix>[a-z_][a-z_0-9\-\.]*):[^"\/:]/i', $xpath, $matches)) {
             return array_unique($matches['prefix']);
         }