proses login

<?php

$error = FALSE;
$error_message = FALSE;
$url = '';

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

if ($error === FALSE && $username != 'admin') {
    $error = $error_message = "Username tidak dikenali";
}

if ($error === FALSE && $password != '123123') {
    $error = $error_message = "Password tidak dikenali";
}

$result = array(
    'error' => $error === FALSE ? TRUE : FALSE,
    'error_message' => $error_message
);

echo json_encode($result);