Php DB wrappers options

Use db wrappers in php don't write to mysql only
well pdo in php is very buggy but some of the bugs are fixed in 5.3

http://www.alberton.info/php_pdo_firebird_status.html
http://forums.devshed.com/firebird-sql-development-61/firebird-and-php-pdo-functions-327659.html

I would recommend to use an stable wrapper around firebird/ibase/mysql functions
the one from cakephp is very well done you can find them in the cake
php source code

also there is mdb2 with an good firebird/ibase driver

also i have seen the adodb for