Unnamed

<?php//...	public function begin()	{		$this->tx = array();	}		public function commit()	{	}		public function rollback()	{		foreach($this->tx as $k => $v) $this->data[$k] = $v;	}		public function __set($k, $v)	{		if(!isset($this->data[$k])) $this->data[$k] = null;		if(!isset($this->tx[$k])) $this->tx[$k] = $this->data[$k];		$this->data[$k] = $v;	}//...?>