Check if user closed the page in PHP?

Question

I made a chat using PHP and JavaScript chat and there is a disconnect button which removes user from the chat removing him from user list first. But if the user closes brows

Answer 1

Request a PHP script that goes a little something like this, with AJAX:

register_shutdown_function("disconnect_current_user");
header('Content-type: multipart/x-mixed-replace; boundary="pulse"');

while(true) {
   echo "--pulse\r\n.\r\n";
   sleep(2);
}

This way, you won't constantly be opening/closing connections.