MySQL/PDO internal functioning

I search Internal functionning with mysql. I have already read some function in MySQL API for C, for example mysql_store_result and mysql_use_result, and i have done some tests for PHP memory usage with both PDO::MYSQL_ATTR_USE_BUFFERED_QUERY values, but if PDO C code have allocated memory, i don't know how exactly it run (and Database storage temporary while mysql_free_result not called).

I am n开发者_StackOverflow社区ot searching answer here, but documentation about this. Have you link to recommend to me ?

Thanks

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I recommend you start with a tutorial reference such as the following:
Why you Should be using PHP’s PDO for Database Access

Followed by browsing the official documentation here:
PHP: PDO - Manual

These two references helped me get up to speed with PDO in no time, beware there are a few typos in the first link, nothing major.

Also SO has a heap on information on PDO such as creative static PDO objects to call (useful for OOP), inserting NULL values and other general 'troublshooting' issues.