when i type “php yii” in terminal i get this error
Calling unknown method: yii2mod\rbac\controllers\AssignmentController::getHelpSummary()’
what to do for this error

You can give us more information.

i want run rbacController by this command “php yii rbac/init”
but when i run that command i get error Error: Unknown command “rbac/init”.
then i asked for that error
someone say run php yii
and …

Looks like a problem in yii2mod.

AssignmentController must extend the yii\console\Controller class. to work in console environment.

Are you sure this controller is meant to be used in console env?