Now all HTTP requests to Felix-Halim.NET will be responded using "Content-Encoding: gzip" if possible. This reduces the transfer time and network traffic tremendously.
PHP made it so easy to achieve this: just by adding this line at the very beginning of the script:
ob_start("ob_gzhandler");
To see that the gzhandler working correctly, you can view the page using FireFox and FireBug plugin and see under Net tab the response header will now contains "Content-Encoding: gzip" and the response bytes reduced significantly.