phpinfo() is commonly used to check configuration settings and for available predefined variables on a given system. To create a phpinfo page please do the following:

• Open your favourite text editor (ie. textpad)
• Copy the following and paste it to your editor:

<?php
phpinfo();
?>

• Save your file as phpinfo.php (NOT phpinfo.php.txt)
• Upload your phpinfo.php file to your root directory
• Go to http://yourdomainname.com/phpinfo.php, you should be able to check your PHP settings

How to, phpinfo