From ecd107afb2a62274050d2233130ae2254ec9cc87 Mon Sep 17 00:00:00 2001
From: Tim Starling <tstarling@users.mediawiki.org>
Date: Mon, 29 Aug 2011 04:01:40 +0000
Subject: [PATCH] In Language::isValidBuiltInCode(), reject the empty string
 per Nikerabbit's request on CR r82927. I'm not sure what the reason for the
 request was, but I suppose an empty language code could result in the base
 Language class being used, which could be problematic for some caller. It
 doesn't do any harm to reject it here.

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

diff --git a/languages/Language.php b/languages/Language.php
index 474fde02cd..49067be2cd 100644
--- a/languages/Language.php
+++ b/languages/Language.php
@@ -215,7 +215,7 @@ class Language {
 	 * @return bool
 	 */
 	public static function isValidBuiltInCode( $code ) {
-		return preg_match( '/^[a-z0-9-]*$/i', $code );
+		return preg_match( '/^[a-z0-9-]+$/i', $code );
 	}
 
 	public static function classFromCode( $code ) {
-- 
2.20.1