db_factory.php

<?php
class DBControl {

	private $__db = null;
	private $__parent = null;


	private function __appendDB($name,$args){
		# Get method's declared parameters.
		$params = $this->__parent->getMethod($name)->getParameters();
		# Make sure all arguments are set.
		for($i=0; $i<count($params);$i++) if (!isset($args[$i])) $args[$i] = $params[$i]->getDefaultValue();
		# Appends Database object.
		$args[] = $this->__db;
		return $args;
	}

	final public function __call($name,$args){
		if (!is_callable("DB::$name")) DB::error("invalid_method: '$name'");
		return call_user_func_array("DB::$name",$this->__appendDB($name,$args));
	}
	
	public function __construct($db){
		$this->__parent = new ReflectionClass('DB');
		$this->__db = $db;
	}
	
}

?>