+// global variables, globals should remain contant
+$scriptUrl = $_SERVER["SCRIPT_NAME"];
+$rootUrl = dirname($scriptUrl);
+if (substr($rootUrl, -1) !== '/') $rootUrl.='/'; // add a trailing / to rootUrl
+// $scriptUrl = "/path/to/bizou/index.php"
+// $rootUrl = "/path/to/bizou/"
+