how to connect php with arduino

I know arduino can be controlled with the web !! and how to connect the web with arduino, rilay
how the solution please help your theme

If you are having the Arduino be a server, then there is no PHP involved. Therefore, you must be having the Arduino as a client. Therefore, no browser on earth is going to be able to send it any data. Therefore, you can't control the Arduino from the internet.

The only way that you can control the Arduino from the internet is if the Arduino is a server. And, if you are doing that, PHP is not involved, as the Arduino can not run a PHP engine.