To enable Firebird/InterBase support configure PHP --with-interbase[=DIR] , where DIR is the Firebird/InterBase base install directory, which defaults to /usr.
Note: Note to Win32/Win64 Users
为锟斤拷使锟斤拷锟斤拷展锟斤拷效锟斤拷 DLL 锟侥硷拷锟斤拷锟斤拷锟斤拷锟斤拷 Windows 系统锟斤拷 PATH 指示锟斤拷路锟斤拷锟斤拷锟揭碉拷锟斤拷锟斤拷尾锟斤拷锟斤拷锟斤拷锟较拷锟斤拷锟轿硷拷锟斤拷为"锟斤拷锟斤拷锟� Windows 锟叫斤拷 PHP 目录锟接碉拷 PATH 锟斤拷"锟斤拷FAQ锟斤拷锟斤拷然锟斤拷 DLL 锟侥硷拷锟斤拷 PHP 锟侥硷拷锟叫革拷锟狡碉拷 Windows 系统目录也锟叫o拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 锟斤拷锟斤拷展锟斤拷要锟斤拷锟斤拷锟侥硷拷锟斤拷 PATH 路锟斤拷锟叫o拷 fbclient.dll,gds32.dll
If you installed the Firebird/InterBase database server on the same machine PHP is running on, you will have this DLL already and fbclient.dll,gds32.dll (gds32.dll is generated from the installer for legacy applications) will already be in the PATH.