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
    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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