From bb63c1c6041659dc076c82e764fe9097653897e1 Mon Sep 17 00:00:00 2001
From: Tim Starling <tstarling@users.mediawiki.org>
Date: Mon, 30 Apr 2007 10:28:21 +0000
Subject: [PATCH] More general thumbnail filename check on purge, to allow for
 general parameter strings

---
 includes/Image.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/includes/Image.php b/includes/Image.php
index 0c40c92eb8..8cc8c39597 100644
--- a/includes/Image.php
+++ b/includes/Image.php
@@ -1075,7 +1075,9 @@ class Image
 		$urls = array();
 		foreach ( $files as $file ) {
 			$m = array();
-			if ( preg_match( '/^\d+px/', $file, $m ) ) {
+			# Check that the base image name is part of the thumb name
+			# This is a basic sanity check to avoid erasing unrelated directories
+			if ( strpos( $file, $this->name ) !== false ) {
 				$url = $this->thumbUrlFromName( $file );
 				$urls[] = $url;
 				@unlink( "$dir/$file" );
-- 
2.20.1