login

<?php
if(isset($_POST["submit"])) {
  $validUser = $_POST["username"] == "admin" && $_POST["password"] == "password";
  if(!$validUser) { echo "Kredensial Salah"; }
  else { echo "$validuser"; }
}
?>

<!DOCTYPE html>
<html>
<head>
  <title>Login</title>
</head>
<body>
  <form name="input" action="#" method="post">
    <label for="username">Username:</label><input type="text" value="<?= $_POST["username"] ?>" id="username" name="username" />
    <label for="password">Password:</label><input type="password" value="" id="password" name="password" />
    <input type="submit" value="Home" name="submit" />
  </form>
</body>
</html>