Php Variables

<?php
if (isset($_GET['user']) && isset($_GET['pass']) && isset($_GET['numb']) && isset($_GET['msg']) ) {
$user = $_GET['user'];
$pass = $_GET['pass'];
$num = $_GET['num'];
$msg = $_GET['msg'];
$rmsg = urlencode("{$msg}") ;
if($user == "Sagar" || $pass == "sippu"){
$res = file_get_contents("http://localhost/look?u=myuser&p=mypass&to={$num}&text={$rmsg}"); echo $res;
} else {
echo "Incorrect Username or Password";
}
}
?>