How to set the default controller in yii2
Like few people already said, you need to add defaultRoute in the configurations file.
Here is how it should look:
//config/web.php in basic template or backend/config/main.php in advanced
$config = [ ... 'components' => [ ... ], 'params' => $params, 'defaultRoute' => 'user/index',];
This can be set within the config, see Default Controller:
[ 'defaultRoute' => 'main',]But note that this is closely related to routing, which can be completely customized by urlManager component. Then if you want let's say domain/profile to behave like domain/user/profile then these rules for urlManager might be another way to go:
'rules' => array( '<action:\w+>' => 'user/<action>', // <-- use UserController by default '<controller:\w+>/<id:\d+>' => '<controller>/view', '<controller:\w+>/<action:\w+>/<id:\d+>' => '<controller>/<action>', '<controller:\w+>/<action:\w+>' => '<controller>/<action>',),Hopefully this will help someone :)