GET Method :
1024 Bytes of data can be transferred via this method and the transfer data parameters are visible in the address bar so it is not as much as secure method .
$get = $_GET[‘variable’];
POST method :
It does the same as the GET but the main difference between the GET and POST is that the transferred data are not visible to end user thus , it is much secure in comparison GET method.
$post = $_POST[‘variable’];
REQUEST Method :
This method accept the form parameters either the method is GET or POST.
$request = $_REQUEST[‘variable’];