Untitled

<?php
session_start(); $username = $password = $userError = $passError = '';
if(isset($_POST['sub'])){
  $username = $_POST['username']; $password = $_POST['password'];

  if($username !== 'Bobo' || $password !=="123")
    echo "gresit" ;
  else echo "corect";

}

echo "<html>
<body>
  <form name='input' action='{$_SERVER['PHP_SELF']}' method='post'>
  <input type='text' value='$username' id='username' name='username' />
  <input type='password' value='$password' id='password' name='password' />
    <input type='submit' value='Home' name='sub' />
   </form>
</body>
</html>";
?>