LOGIN.PHP

<?php
session_start();

if( isset($_SESSION['akses']) )
{
    header('location:'.$_SESSION['akses']);
    exit();
}

$error = '';
if( isset($_SESSION['error']) ) {

     $error = $_SESSION['error']; // set error

     unset($_SESSION['error']);
} ?>

<?php echo $error;?>
<h3>Form Login</h3>
<form action="check-login.php" method="post">
username : <br/>
<input type="text" name="usernamemu" /> <br>
password : <br/>
<input type="password" name="passwordmu" />
<br>
<button>Login</button>
</form>