<?

$data = $_POST;

$response = array("status" => "ok");

$require = array("login", "password");
$error= array();
foreach ($require as $item){
    if(!array_key_exists($item, $data) || empty($data[$item])){
        $error[$item] = "поле пустое";
    }
}

if(count($error) === 0){
    if(array_key_exists('remember_me', $data) && $data['remember_me'] == '1' ){
        setcookie("remember", 1);
        setcookie("login", $data['login']);
        setcookie("password", $data['password']);
    }
}else{
    $response['status'] = "error";
    $response['error'] = $error;
}

print json_encode($response);