You will require ZLib library in your server's PHP configuration to decompress our PHP script codes.

Zlib support in PHP is not enabled by default. If required, you will need to request your server administrator to compile your PHP with Zlib.

The windows version of PHP has built in support for this extension. You do not need to load any additional extension in order to use these functions.

* Builtin support for zlib on Windows is available with PHP 4.3.0.

To check if you have ZLib library enabled, use the phpinfo() function. Or if you already have the One Admin files uploaded to your web server, you can access the URL http://your_domain.com/oneadmin/phpinfo.php with your browser.

Below are the screen shots to show that you have the required Zlib library running.