We don't have any PHP connector, but PHP and other scripting languages have good support for interfacing with C/C++ libraries.
You can build your own C API wrapper in PHP or use wrapper generator (e.g. SWIG) to create one, so you can access our API's functions in IDKit.dll.
Another issue is how to access fingerprint reader from withing web browser. ActiveX is generally used for this purpose. ActiveX control installed in web browser can interface with our IDKit SDK through C++ API. License for these clients can be acquired remotely from ExpressID AFIS server.