Cookies Handling In Yii2 set and get

A cookie is a small file that the server embeds on the user’s computer and it is often used to identify a user. In plain PHP we can access using $_COOKIE global variable.

In Yii, cookie is an object of ‘yii\web\Cookie’. ‘yii\web\Request’ and ‘yii\web\Response’ maintain a collection of cookies via the property named cookies.
SET COOKIE

$cookies = Yii::$app->response->cookies;
// add a new cookie to the response to be sent
$cookies->add(new \yii\web\Cookie([
    'name' => 'username',
    'value' => 'yiiuser',
]));

GET COOKIE

$cookies = Yii::$app->request->cookies;

// get the cookie value 

$username = $cookies->getValue('username');

//return default value if the cookie is not available

$username = $cookies->getValue('username', 'default');

// Check the availability of the cookie

if ($cookies->has('username'))

echo $cookies->getValue('username');

REMOVE COOKIE

$cookies = Yii::$app->response->cookies;

$cookies->remove('username');

unset($cookies['username']);