How to get the ip address of the user when entering the site?

Question

Yii

I have a project in yii2 with online video tutorials, I need to do this, when a user enters the site from different devices (more than 3), he must be blocked so that he does not spread his account. Well, krch, he should only access the site from three devices. How to do this, who knows? How does it even work? Using ip addresses or using a token? If anyone has examples

Answer 1

You can get the user's IP like this: Yii::$app->request->getUserIP();
IP checking can be done by adding the AccessManager filter to bootstrap
web.php:

$config = [
    ...
    'bootstrap' => [
        \app\components\user\AccessManager::class
    ],

access manager:

namespace app\components\user;

use yii\base\Component;
use Yii;

class AccessManager extends Component
{
    const ERROR_PAGE = 'site/error';

    public function init()
    {
        if (isset(Yii::$app->user) && !Yii::$app->user->isGuest) {
            $this->filtering();
        }
    }

    protected function filtering()
    {
        $user = Yii::$app->user->identity;
        $allowedIps = $user->getAllowedIps();
        if (!in_array(Yii::$app->request->getUserIP(), $allowedIps)) {
            Yii::$app->catchAll = [self::ERROR_PAGE];
        }
    }
}