Is it possible to consolidate authorization in Yii across multiple domains?

Question

Yii

The same site in different languages ​​is located on the ru and com domains. Is it possible to make sure that when moving from one domain to another, the user remains logged in?
Framework 1.x

Answer 1

Yes, it's possible. You just need to figure out how to merge sessions on different domain names.
When authorizing on domain A, you can insert a link (for example, a picture) with an identifier / token to domain B. When processing a picture request, merge sessions.

Answer 2

Store sessions in a database/radish.
Perhaps you need to set the id in the application config so that it is not calculated dynamically.
// upd
Here is an example of my config in one of the projects

'session' => [
    'class' => 'CCacheHttpSession',
    'cacheID' => 'redis',
    'sessionName' => 'SESSIONN',
    'cookieParams' => [
        'httponly' => true,
        'domain' => '.' .  $_SERVER['SERVER_NAME'],
    ],
],