Predefined Classes

This section lists standard predefined classes. Miscellaneous extensions define other classes which are described in their reference.

Standard Defined Classes

These classes are defined in the standard set of functions included in the PHP build.

Directory

The class from which dir is instantiated.

stdClass

Created by typecasting to object.

__PHP_Incomplete_Class

Possibly created by unserialize().

Predefined classes as of PHP 5

These additional predefined classes were introduced in PHP 5.0.0.

exception

php_user_filter

Closure

The predefined final class Closure was introduced in PHP 5.3.0. It is used for internal implementation of anonymous functions.

The class has a constructor forbidding the manual creation of the object (issues E_RECOVERABLE_ERROR) and the __invoke method with the calling magic.

Special classes

Following identifiers may not be used as a class name as they have special purpose.

self

Current class.

static

Current class in runtime.

parent

Parent class.