PHP no Núcleo: Um guia do Hacker para a Zend Engine
PHP Manual

PDO Driver How-To

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The purpose of this How-To is to provide a basic understanding of the steps required to write a database driver that interfaces with the PDO layer. Please note that this is still an evolving API and as such, subject to change. This document was prepared based on version 0.3 of PDO. The learning curve is steep; expect to spend a lot of time on the prerequisites.


PHP no Núcleo: Um guia do Hacker para a Zend Engine
PHP Manual