yii\base

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Classes

Class	Summary
`Action`	Action is the base class for all controller action classes.
`ActionEvent`	ActionEvent represents the event parameter used for an action event.
`ActionFilter`	ActionFilter is the base class for action filters.
`Application` abstract	Application is the base class for all application classes.
`BaseObject`	BaseObject is the base class that implements the property feature.
`Behavior`	Behavior is the base class for all behavior classes.
`Component`	Component is the base class that implements the property, event and behavior features.
`Controller`	Controller is the base class for classes containing controller logic.
`DynamicModel`	DynamicModel is a model class that supports defining attributes at run-time (the so-called “dynamic attributes”) using its constructor or `defineAttribute()`. DynamicModel can be used to support ad hoc data validation.
`ErrorException`	ErrorException represents a PHP error.
`ErrorHandler` abstract	ErrorHandler handles uncaught PHP errors and exceptions.
`Event`	Event is the base class for all event classes.
`Exception`	Exception represents a generic exception for all purposes.
`ExitException`	ExitException represents a normal termination of an application.
`InlineAction`	InlineAction represents an action that is defined as a controller method.
`InvalidArgumentException`	InvalidArgumentException represents an exception caused by invalid arguments passed to a method.
`InvalidCallException`	InvalidCallException represents an exception caused by calling a method in a wrong way.
`InvalidConfigException`	InvalidConfigException represents an exception caused by incorrect object configuration.
`InvalidRouteException`	InvalidRouteException represents an exception caused by an invalid route.
`InvalidValueException`	InvalidValueException represents an exception caused by a function returning a value of unexpected type.
`Model`	Model is the base class for data models.
`ModelEvent`	ModelEvent represents the parameter needed by `Model` events.
`Module`	Module is the base class for module and application classes.
`NotSupportedException`	NotSupportedException represents an exception caused by accessing features that are not supported.
`Request` abstract	Request represents a request that is handled by an `Application`.
`Response`	Response represents the response of an `Application` to a `Request`.
`Security`	Security provides a set of methods to handle common security-related tasks.
`Theme`	Theme represents an application theme.
`UnknownClassException`	UnknownClassException represents an exception caused by using an unknown class.
`UnknownMethodException`	UnknownMethodException represents an exception caused by accessing an unknown object method.
`UnknownPropertyException`	UnknownPropertyException represents an exception caused by accessing unknown object properties.
`UserException`	UserException is the base class for exceptions that are meant to be shown to end users.
`View`	View represents a view object in the MVC pattern.
`ViewEvent`	ViewEvent represents events triggered by the `View` component.
`ViewNotFoundException`	ViewNotFoundException represents an exception caused by view file not found.
`ViewRenderer` abstract	ViewRenderer is the base class for view renderer classes.
`Widget`	Widget is the base class for widgets.
`WidgetEvent`	WidgetEvent represents the event parameter used for a widget event.

Interfaces

Interface	Summary
`Arrayable`	Arrayable is the interface that should be implemented by classes who want to support customizable representation of their instances.
`BootstrapInterface`	BootstrapInterface is the interface that should be implemented by classes who want to participate in the application bootstrap process.
`Configurable`	Configurable is the interface that should be implemented by classes who support configuring its properties through the last parameter to its constructor.
`DynamicContentAwareInterface`	DynamicContentAwareInterface is the interface that should be implemented by classes which support a `View` dynamic content feature.
`StaticInstanceInterface`	StaticInstanceInterface is the interface for providing static instances to classes, which can be used to obtain class meta information that can not be expressed in static methods.
`ViewContextInterface`	ViewContextInterface is the interface that should implemented by classes who want to support relative view names.

Traits

Trait	Summary
`ArrayableTrait`	ArrayableTrait provides a common implementation of the `Arrayable` interface.
`ArrayAccessTrait`	ArrayAccessTrait provides the implementation for `IteratorAggregate`, `ArrayAccess` and `Countable`.
`DynamicContentAwareTrait`	DynamicContentAwareTrait implements common methods for classes which support a `View` dynamic content feature.
`StaticInstanceTrait`	StaticInstanceTrait provides methods to satisfy `StaticInstanceInterface` interface.