php login

<?php

$admins   = array (
                "Osama",
                "Hassan",
                "Wael");

                $logins   = array (
                                123,
                                456,
                                789,
                              );


$username = $_GET['Username'];
$password = $_GET['Password'];

if(in_array($username,$admins)) {

  if (in_array($password,$logins)) {
    echo "Welcome";
  } else {
    echo "No";
  }
}