Pretending multiple inheritance in php5

MultipleInheritant.php

<?php

namespace qoo\core;





/**

*

*	Simple abstract class that virtually "inherit" methods and properties from other classes.

*

*	It's virtual because it adds nothing more to your class definition.

*	It just add methods runtime.

*
*	@author Mattia Alfieri <mattia.alfieri@ymail.com>
*	@license BSD
*	

**/

abstract class MultipleInheritant

{

	/**

	*

	*	@var mixed Array of instanced superclasses

	*

	**/

	protected $_Superinstances = array();
	
	/**
	*	Initialize this array with names of classes you want to inherit
	*	@var mixed Array of superclasses names
	*
	**/
	protected $_Superclasses = array();
	
	/**
	*
	*	Constructor, if you override the constructor, remember to
	* 	call parent::__construct() or you will lose automatic inheritance
	*	through the $_Superclasses array
	*
	*
	**/
	public function __construct() {
	
		foreach ($this->_Superclasses as $superclass)
		{
			$this->inherit($superclass);
		}
	}
	

	/**
	*
	*	'Inherits' $class, this means that you 
	*
	*
	**/

	public function inherit($class)

	{

		if (is_object($class) )

			array_push($this->_Superinstances,$class);

		elseif (is_string($class) && class_exists($class))

			array_push($this->_Superinstances,new $class());

		elseif(is_string($class) && !class_exists($class))

			throw new \qoo\core\Exception("$class is not a classname");

		else

			throw new \qoo\core\Exception("You can inherit only classnames or instances");

		

	}

	

	

	private function LookForClassWithMethod($object,$method)

	{

			if (method_exists($object,$method) )

					return $object;

				

			if (is_subclass_of($object,'/qoo/core/MultipleInheritant') OR is_subclass_of($object,'\qoo\core\MultipleInheritant'))

			{

				foreach( $object->getInheritedInstances() as $inherited)

				{
					$result = $this->LookForClassWithMethod($inherited,$method);
					if (null !== $result)
						return $result;

				}
		 	}

			else

				return null;

			

	}
	
	private function LookForClassWithProperty($object,$property)

	{

			if (property_exists($object,$property) )

					return $object;

				

			if (is_subclass_of($object,'/qoo/core/MultipleInheritant') OR is_subclass_of($object,'\qoo\core\MultipleInheritant'))

			{

				foreach( $object->getInheritedInstances() as $inherited)

				{
					$result = $this->LookForClassWithProperty($inherited,$property);
					if (null !== $result)
						return $result;

				}
		 	}

			else

				return null;

			

	}

	
	/**
	*	Returns instances of inherited objects
	*
	*
	**/

	public function getInheritedInstances()

	{

		return $this->_Superinstances;

	}

	

	

	public function __call($method,$args = array())

	{

		$super = $this->LookForClassWithMethod($this,$method);

		

		

	

		if (null === $super)

			throw new \Exception('Call to undefined method <b>'.$method.'</b> in class <b>'.get_class($this).'</b>' );

		

		switch (count($args) )

		{

			case 0:

				$super->$method();

			break;

			case 1:

				$super->$method($args[0]);

			break;

			case 2:

				$super->$method($args[0],$args[1]);

			break;

			case 3:

				$super->$method($args[0],$args[1],$args[2]);

			break;

			case 4:

				$super->$method($args[0],$args[1],$args[2],$args[3]);

			break;

			case 5:

				$super->$method($args[0],$args[1],$args[2],$args[3],$args[4]);

			break;

			case 6:

				$super->$method($args[0],$args[1],$args[2],$args[3],$args[4],$args[5]);

			break;

			case 7:

				$super->$method($args[0],$args[1],$args[2],$args[3],$args[4],$args[5],$args[6]);

			break;

			case 8:

				$super->$method($args[0],$args[1],$args[2],$args[3],$args[4],$args[5],$args[6],$args[7]);

			break;

			default:

				throw new \Exception('The inherited method '.$method.' in class '.get_class($this).' has too many arguments to be handled by qoo\core\MultipleInheritant' );

			break;

		}

	}

	
	/**
	*
	*	Looks for a superclass with the requested property
	*
	*	@param string $property The name of the property
	**/

	public function __get($property)

	{

		$super = $this->LookForClassWithProperty($this,$property);
		if (null === $super)

			throw new \Exception('Call to undefined property named '.$property);
		
		return $super->{$property};

	}

	

}

?>