diff --git a/public/tools.php b/public/tools.php
index d1e76b2ca..bfe6f8f44 100644
--- a/public/tools.php
+++ b/public/tools.php
@@ -85,7 +85,7 @@ function clearCache($root_dir, $php_path)
         if (!file_exists($php_path)) {
             $php_path = 'php';
         }
-        $php_path = preg_replace("#[ ;\|]#", '', $php_path);
+        $php_path = preg_replace("#[ ;&\|]#", '', $php_path);
         if (!$php_path) {
             $php_path = 'php';
         }