Extender

The Class Extender Class

The Extender Class allows (or simulates) multiple class inheritance in PHP. It does this by loading instances of the extended class under the covers and transparently passing non-existent method calls on to 'child' classes (if the method exist). It will also work with member variables and honors the private, protected and public variable definitions.

Properties

children

private array $children

methods

private array $methods

properties

private array $properties

Methods

__call

public __call(string $method, array $args = []): void

This method call router will route the method call to the first child class that was found to have the requested method. If the method does not exist an \Exception is thrown.

Parameters

Parameter	Type	Description
$method	string	Then name of the method being called
$args	array	An array of arguments from the method call

__toString

public __toString(): string

Pass through method for converting the element to a string. If one of the child classes had a __tostring() method then this method is called on the first child that has it.

__get

public __get(string $property): mixed

Get a property from the instantiated class object for properties that do not exist. This will return the value of a property if it exists in a child class. This method honors the private, protected and public variable declarations.

Parameters

Parameter	Type	Description
$property	string	The property being requested

__set

public __set(string $property, mixed $value): void

Set a property on the instantiated class object for properties that do not exist. This will set the value of a property if it exists in a child class. This method honors the private, protected and public variable declarations. If the child class variable is not meant to be accessible, either by not existing, or being set public, or being protected and the call originated outside the object, then the variable is created on the fly in the main object. This is the same as a normal object.

Parameters

Parameter	Type	Description
$property	string	The property being set
$value	mixed	The value to set

Test if the class extends another class.

public (string $class): bool

This implements the "instanceof" functionality of PHP and searches all the child classes to see if any of them extend the specified class.

Parameters

Parameter	Type	Description
$class	string	The name of the class to test

extend

protected extend(): bool

Extend a class with a child class.

The arguments are as follows:

The name of the class to inherit from

... A list of arguments to pass on to the class constructor

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