Subject good news everyone : Firebird driver will be back in php 5.3.4
Author marius adrian popa
Pierre Joye
(Team Leader, Developer) wrote on windows php building list : (someone
asked about the ldap extension)

5.3.4 should have it. There are other missing extensions but some of
them will never be restored (like *spell for example). Firebird was
the last one actually missing and should be back in 5.3.4.