ob_gzhandler encoding ???

Does anyone know how I can test (and see) if my ob_gzhandler() is working? I've written the following script, and run it from the command line to "see" the output -- hoping it's encoded -- it isn't -- so I want to make sure I'm doing it right. <? header("Accept-Encoding: gzip, deflate"); ob_start("ob_gzhandler"); ?> some HTML code .... <? ob_end_flush(); ob_end_clean(); ?> I save then run the file: C:>php test.php Thanks