Mine

<?php
class alias {
	var $_notStatic;
	function alias() {
		$this->_notStatic = 'ABC';
	}
	
	function query() {
		return 'xxx'; // static
		// return $this->_notStatic; // not static
	}
}

class dbo {
	
	var $_alias;
	
	function dbo() {
		$this->_alias = new alias();
	}
	
	function prepare() {
		$a =& func_get_args();
		return call_user_func_array(array('alias','query'),$a);
	}
	
}

$d = new dbo;

die($d->prepare());
?>