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There are many tutorials on PDO already, but unfortunately, most of them fail to explain the real benefits of PDO, or even promote rather bad practices. The only two exceptions are [phptherightway.com](http://www.phptherightway.com/#pdo_extension) and [hashphp.org](http://wiki.hashphp.org/PDO_Tutorial_for_MySQL_Developers), but they miss a lot of important information. As a result, half of PDO's features remain in obscurity and are almost never used by PHP developers, who, as a result, are constantly trying to reinvent the wheel which *already exists in PDO.*