web tujuan

<?php

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

if (isset($_POST)) {
	echo $user.' '.$pass;
}
echo "<hr><br>";

if (isset($_POST['submit']) == "Submit"){
	if ($user == "udin12"){
		if ($pass == "admin"){
			header("Location: sukses.php");
		} else {
			echo "password SALAH";
		}
	} else {
		echo "User Tidak ada";
	}
}

?>

<!DOCTYPE html>
<html>
<head>
	<title></title>
</head>
<body>
	<form method="post" action="">
		<input type="text" name="username">Username
		<br>
		<input type="password" name="password">Password
		<br>
		<button type="submit" name="submit" value="Submit" id="submit">Submit</button>
	</form>

</body>
</html>