Abstract Class yii\base\Application

The asset manager application component.

The auth manager application component. Null is returned if auth manager is not configured.

List of components that should be run during the application bootstrapping process.

Each component may be specified in one of the following formats:

• an application component ID as specified via $components.
• a module ID as specified via $modules.
• a class name.
• a configuration array.
• a Closure

During the bootstrapping process, each component will be instantiated. If the component class implements yii\base\BootstrapInterface, its bootstrap() method will be also be called.

The cache application component. Null if the component is not enabled.

The charset currently used for the application.

Values given in terms of name-value pairs

The currently active controller instance

The namespace that controller classes are located in. This namespace will be used to load controller classes by prepending it to the controller class name. The default namespace is app\controllers.

Please refer to the guide about class autoloading for more details.

The database connection.

The error handler application component.

List of installed Yii extensions. Each array element represents a single extension with the following structure:

[
    'name' => 'extension name',
    'version' => 'version number',
    'bootstrap' => 'BootstrapClassName',  // optional, may also be a configuration array
    'alias' => [
        '@alias1' => 'to/path1',
        '@alias2' => 'to/path2',
    ],
]

The "bootstrap" class listed above will be instantiated during the application bootstrapping process. If the class implements yii\base\BootstrapInterface, its bootstrap() method will be also be called.

If not set explicitly in the application config, this property will be populated with the contents of @vendor/yiisoft/extensions.php.

The formatter application component.

The internationalization application component.

The language that is meant to be used for end users. It is recommended that you use IETF language tags. For example, en stands for English, while en-US stands for English (United States).

See also $sourceLanguage.

The layout that should be applied for views in this application. Defaults to 'main'. If this is false, layout will be disabled.

List of loaded modules indexed by their class names.

The log dispatcher application component.

The mailer application component.

The application name.

The request component.

The requested Action. If null, it means the request cannot be resolved into an action.

The parameters supplied to the requested action.

The requested route

The response component.

The directory that stores runtime files. Defaults to the "runtime" subdirectory under $basePath.

The security application component.

The language that the application is written in. This mainly refers to the language that the messages and view files are written in.

See also $language.

The current application state during a request handling life cycle. This property is managed by the application. Do not modify this property.

The time zone used by this application.

The unique ID of the module.

The URL manager for this application.

The directory that stores vendor files. Defaults to "vendor" directory under $basePath.

The view application component that is used to render various view files.