Code for simple Login verification

Wizpert1.php

<?php

$username = $_POST['username'];
$password = $_POST['password'];

if ($username && $password)
{
  $connect = mysql_connect("localhost", "root", "") or die("Couldn't Connect!");
  mysql_select_db("phplogin") or die("Couldn't Find DB!");
}
else die("Please Enter Both Username & Password!");