Please can you point me to documentation that shows that you can easily switch vendor when using PDO? The PHP docs clearly state database abstraction isn't purp

Please can you point me to documentation that shows that you can easily switch vendor when using PDO? The PHP docs clearly state database abstraction isn't purpose of PDO. The purpose of PDO is to abstract access to a database. http://www.php.net/manual/en/intro.pdo.php http://www.php.net/manual/en/intro.pdo.php In this sense, wouldn't it have been better to either recommend that he should have used a DBA library? Or even recommend that he used PDO in place of CodeIgniter's own DB access library? The OP's experience aside, I think you're also missing that this was written on top of CodeIgniter. From my own experience and learning, CodeIgniter isn't really the best tool for writing larger applications. It's architecture isn't so great and is largely a remanent of the past. To end a rant about CodeIgniter short, it seems more natural to write namespaced procedures using classes rather than taking full advantage of objects and OO (again, probably due to it being largely a PHP4 framework).