From cecd6a37c511f7d1ece650da5d3b71bf34625289 Mon Sep 17 00:00:00 2001
From: Tim Starling <tstarling@users.mediawiki.org>
Date: Tue, 1 Feb 2011 22:54:50 +0000
Subject: [PATCH] Relax Language::isValidCode() to avoid breaking uselang hacks

---
 languages/Language.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/languages/Language.php b/languages/Language.php
index edd607b483..3b87db7515 100644
--- a/languages/Language.php
+++ b/languages/Language.php
@@ -196,7 +196,7 @@ class Language {
 	 * not it exists.
 	 */
 	public static function isValidCode( $code ) {
-		return (bool)preg_match( '/^[a-z-]+$/', $code );
+		return strcspn( $code, "/\\\000" ) === strlen( $code );
 	}
 
 	/**
-- 
2.20.1