The best way to find the PHP configuration information for the specific server you're on is to make a phpinfo file. Create a file called phpinfo.php with the following code:

<?php
phpinfo();
?>

Once you've created the file upload phpinfo.php to your public_html folder on your web space. Now visit this page in your browser by going to http://www.yourdomain.com/phpinfo.php (replacing yourdomain.com with your actual domain). This will give you our current PHP5 based configuration.