In this new post to his blog Kevin van Zonneveld looks to help you make the transition up to the latest version of PHP (5.3) in a Ubuntu Jaunty installation (including a few things to specifically watch out for).

PHP 5.3 is a big leap forward for PHP and brings of a lot of neat features. However, big leaps can also mean big changes and potentially big breakage when it comes to backwards compatibility. I did some experimenting with running a big legacy application and a CakePHP application on PHP 5.3 and would like to share my findings with you. Here are a couple of tips to prepare your code for PHP 5.3

He mentions things like:

• Updates to short tag support
• Deprecation warnings
• MySQL driver support
• Extensions