Yii2 Application Structure

When to use

• The user is setting up a Yii2 application config array and entry script to bootstrap the app.
• The user wants to configure a Yii2 application component such as db, cache, or a custom component accessed via Yii::$app.
• The user needs to register class dependencies in the Yii2 dependency injection container with Yii::$container.

When NOT to use

• Do not scaffold the full Yii2 application structure for a one-off script; a micro-framework or plain PHP is enough.
• Do not apply Yii2 structure guidance when the project targets Yii3, which uses a different config and container model.

Core guidance