..

index.php

@@ -17,7 +17,7 @@
             echo "<h2>" . $path . "</h2>";
 
             $list = scandir($path);
-            $list = array_diff($list, array('.'));
+            $list = array_diff($list, array('.', '..'));
 
             foreach($list as $object) {
                 echo "<a href=\"?path=" . $path . "/" . $object . "\">" . $object . "</a><br>";