Untitled

$ cat /var/www/login.php
<?php
  $username = 'admin';
  $password = 'kjhjkhgjhkgkhjgkjhgjkhgkjhgjkhgjkhgjhkghjkgkjgkjhgjkgh';
?>

<html>
<head></head>

<body>

<?php

 if (!isset($_POST['submit'])) {

   echo '<form action="#" method="post">
          Username: <input type="text" name="username" /> <br />
          Password: <input type="password" name="password" /> <br />
          <input type="submit" name="submit" value="Submit" />
        </form>';

 } else {

   if (($_POST['username'] === $username) && ($_POST['password'] === $password)) {
     echo 'Welcome!';
   } else {
     echo 'Incorrect username and/or password!';
   }

 }

?>

</body>

</html>