// get the cookie collection (yii\web\CookieCollection) from the "request" component $cookies = Yii::$app->request->cookies; // get the "language" cookie value. If the cookie does not exist, return "en" as the default value. $language = $cookies->getValue('language', 'en'); // an alternative way of getting the "language" cookie value if (($cookie = $cookies->get('language')) !== null) { $language = $cookie->value; } // you may also use $cookies like an array if (isset($cookies['language'])) { $language = $cookies['language']->value; } // check if there is a "language" cookie if ($cookies->has('language')) ... if (isset($cookies['language'])) ...

yii2 get cookie

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