Do you disable any PHP functions on your Linux hosting accounts?
To change the status of a function, you can use custom initialization (
php5.ini) files. For more information, see Can I add a PHP initialization file to my hosting account?
How often do you empty the /tmp folder on your Linux hosting servers?
Why did I receive a timezone error with my PHP website?
What is open_basedir?
Can I run both PHP 4 and PHP 5 applications on my hosting account?
Using Server Variable ($_SERVER) Elements with PHP 5
PHP Compatibility and Hosting Quick-Install Applications