For EPEL, you need to contact the maintainer of "php-extras" package which provides extension for php working with libraries available in EPEL (we could'nt modify the RH php package)

@joe : any comment about adding this extension to php main package in Fedora ?

There's no "firebird" module shipped in the PHP tarball - there's "interbase" and there's "pdo_firebird", but, should be fine to enable either/both once the deps are there, AFAIK.

(In reply to comment #2)
> There's no "firebird" module shipped in the PHP tarball - there's "interbase"
yes in PHP it is still named "interbase" but it build without problem with firebird

here how it is build in the Mandriva package
%global modname firebird
%global dirname interbase
%global soname interbase.so
%global inifile 42_%{modname}.ini

Summary:        Firebird database module for PHP
Name:           php-%{modname}
Version:        5.2.6
Release:        0%{?dist}
Group:          Development/Libraries
URL:            http://www.php.net
License:        PHP License
Source0:        %{modname}.ini
BuildRequires:  php-devel >= 5.2.0
BuildRequires:  firebird-devel
Provides:       php-interbase = %{version}-%{release}
BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-buildroot

%description
This is a dynamic shared object (DSO) for PHP that will add Firebird
database support.

%prep

%setup -c -T
cp -dpR %{_usrsrc}/php-devel/extensions/%{dirname}/* .

%build
%serverbuild

phpize
%configure2_5x \
       --with-libdir=%{_lib} \
       --with-interbase=%{_libdir}/firebird


> and there's "pdo_firebird", but, should be fine to enable either/both once the
> deps are there, AFAIK.  

nice

First build available in my private testing repo (php 5.3.0)
php-interbase provide interbase and pdo_firebird

@Philippe : please try it.

I will update rawhide spec after F11.

(In reply to comment #4)
> @Philippe : please try it.
for me it seems ok
but I'm not a PHP dev

I send a mail to the firebird-php group

New PHP 5.2.10 rawhide build provides php-interbase (interbase and pdo_firebird extension)