Predefined Classes
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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

Created by dir().

stdClass

A generic empty class created as a result of typecasting to object or various standard functions.

__PHP_Incomplete_Class

Possibly created by unserialize().

Exception

ErrorException

php_user_filter

Closure

The predefined final class Closure is used for representing anonymous functions.

Generator

The predefined final class Generator is used for representing generators.

ArithmeticError

AssertionError

DivisionByZeroError

Error

Throwable

ParseError

TypeError

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.

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