<?php


$username = "someuser";

$password = "somepassword";



if ($_POST['txtUsername'] != $username || $_POST['txtPassword'] != $password) {



?>



<h1>Login</h1>



<form name="form" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">

    <p><label for="txtUsername">Username:</label>

    <br /><input type="text" title="Enter your Username" name="txtUsername" /></p>



    <p><label for="txtpassword">Password:</label>

    <br /><input type="password" title="Enter your password" name="txtPassword" /></p>



    <p><input type="submit" name="Submit" value="Login" /></p>



</form>



<?php



}

else {



?>



<p>This is the protected page. Your private content goes here.</p>



<?php



}



?>