This example forwards class functionality to the given class

ClassForward.php

<?php
class Bla {
	
	private static $TargetClass = 'Foo';

	public function __callStatic($Method, $Args = array()) {
		self::CallMethod($Method, $Args);
		
	}
	
	public function __call($Method, $Args = array()) {
		self::CallMethod($Method, $Args);
	}
	
	
	private static function CallMethod($Method, $Args) {
		call_user_func_array(
			array(self::$TargetClass, $Method), 
			$Args
		);
	}
	
}

class Foo {
	
	public static function Bar() {
		echo 123;
	}
	
	public function Baz() {
		echo 321;
	}
}

Bla::Bar();

$Baz = new Bla();
$Baz->Baz();

?>