How to test content encoding?

I'm trying to test the gz_handler, among other things, but I have no idea if the output is actually gzip encoded. I'm using PHP 4.0.5 as an Apache module, and here's an example of a test script: <?php ob_start("ob_gzhandler"); ?> <p>This should be compressed. [bunch of text here just to ensure it's big enough to be encoded. the file size is about 5700kb] <?php ob_end_flush(); ?> I'm using IE 5.5 to view the page, and PHP shows the HTTP_SERVER_VARS["HTTP_ACCEPT_ENCODING"] variable as "gzip, deflate", so the browser is saying it supports gzip content. Now the question is, how do I actually know if the browser is getting gzip content? Plutarck