Kamshory, MT

No. It is impossible.

It's better for you copy all attendance data to your local database before you send it to online database. After you finish copy all of them, you should clear attendance...

You can not. This library designed only for read and write data to attendance device. I you want to join the data, first you must store user data and attendance...

Have you done port forwarding on your router?

I have never tried it at all. Maybe you can ask your friends who better understand computer network problems.

I think you have to fixing data length until you get valid result.

socket_recvfrom($this->socket, $received_data, 1032, 0, $this->ip, $this->port); 1032 is data length.

Save all attendance data to your database. The first check on the day is check in, and the last check on the day is check out.

You must create your own code for it.

Change $this->setTimeout($this->sec, $this->usec); To $this->setTimeout($this->timeout_sec, $this->timeout_usec);