$mailer public read-only property The mailer application

$assetManager public read-only property The asset manager

$runtimePath public property The directory that stores runtime

setRuntimePath() public method Sets the directory that

$extensions public property List of installed Yii extensions.

getErrorHandler() public method Returns the error handler

getI18n() public method Returns the internationalization

EVENT_AFTER_REQUEST event of type yii\base\Event

getDb() public method Returns the database connection

$urlManager public read-only property The URL manager