To enable InterBase support configure PHP --with-interbase[=DIR] , where DIR is the InterBase base install directory, which defaults to /usr/interbase.
Note: Note to Win32 Users
为了使此扩展生效, DLL 文件必须能在 Windows 系统的 PATH 指示的路径下找到。如何操作的信息,请参见题为“如何在 Windows 中将 PHP 目录加到 PATH 中”的FAQ。虽然将 DLL 文件从 PHP 文件夹复制到 Windows 系统目录也行,但不建议这样做。 此扩展需要下列文件在 PATH 路径中: gds32.dll
If you installed the InterBase database server on the same machine PHP is running on, you will have this DLL already and gds32.dll will already be in the PATH.