Currently, WordPress works on both PHP 4 and PHP 5 based platforms. However, soon WordPress will not longer support PHP 4. As you're probably aware WordPress 3.0 is soon to be released to the public. It has been said that many features will be coded to run in PHP 5 only. Some existing features, such … Read more about How to Upgrade from PHP 4.x to PHP 5.x at Go Daddy
