The original MySQL API is going away, deprecated by PHP in Version 5.5, with published statements that it will be removed in the future (see the red warning box). Since PHP 5.3 is now (February 2013) at end of life, and PHP 5.4 is current, the issues that will arise from the deprecation and removal are already before us. In fact, some parts of the API are already deprecated. It's time to think about making a change in our scripts. And if you're thinking about PHP 5.5, it's necessary to make the change now: "Please, note that this alpha version [php 5.5.0alpha2] also introduces the ext/mysql depreciation."