I have ZK Teco Bio-metrics Attendance Machine. I need to integrate this machine with my PHP project so our team can access this machine remotely to get their attendance record. Also, I have provided [Official SDK](http://www.zkteco.eu/index.php/downloads/software-downloads) that contains dll files. 

I have copied the dll files in the path "C:\xampp\php\ext\" and included extensions to these files in "php.ini" file. But PHP doesn't support these dll files.

What should I do to use these dll files in my PHP project?