php - Automagically Log into Multiple Domains in Yii2 -

i have site root domain , several sub domains, each separate yii2 module. @ moment have log each sub domain individually. want able log root directory , automatically logged each of sub domains. there few pages here , there on web achieving nothing works.

at moment have same setup in both main.php config files (i.e. root domain , 1 of sub domains testing with)

'components' => [     'request' => [         'enablecookievalidation' => true,         'enablecsrfvalidation' => true,         'cookievalidationkey' => 'xxxxxxx',     ],     'user' => [         'class' => 'yii\web\user',         'identityclass' => 'common\models\user',         'enableautologin' => true,         'identitycookie' => [             'name' => '_myapp',             'httponly' => true,             'path' => '/',         ]     ],     'session' => [         'name' => 'myappsessid',         'cookieparams' => [             'path' => '/',         ],     ], 

when inspecting cookies in chrome after logging in setup see 2 cookies, 1 main site , 1 sub domain, both called myappsessid, , both containing different 'keys' presumably hook user info set on php session. these 2 cookies should 1 cookie both domains hook session user object - i;ve tried different settings can think of , can't work.

to able log on subdomains, use following config:

'components' => [     'session' => [         // ...         'cookieparams' => [             'path' => '/',             'domain' => ".domain.com",         ],     ],     'user' => [         // ...         'identitycookie' => [             'name' => '_identity',             'path' => '/',             'domain' => ".domain.com",         ],     ],     'request' => [         // ...         'csrfcookie' => [             'name' => '_csrf',             'path' => '/',             'domain' => ".domain.com",         ],     ], ],