test setup config options domains

zimbraSingle.php

@@ -113,7 +113,7 @@ function zimbraSingle_ConfigOptions($params)
     ob_flush();
     ob_start();
     var_dump(get_defined_vars());
-    file_put_contents("debug_var_dump.txt", ob_get_flush());
+    file_put_contents("debug_var_dump.txt", ob_end_flush());
 
     $response = zimbraSingleConfigOptions();
     if($response) {