Model attribute accessors ala ruby (for Laravel)

gistfile1.php

<?php

trait ModelAttribute
{
	protected $attr_reader = [];
	protected $attr_writer = [];
	protected $attr_accessor = [];

	public function getAttribute($key)
	{
		if (!$this->isReadable($key)) {
			throw new \Exception('Property undefined or not readable: '.get_class($this).'::$'.$key);
		}
		return parent::getAttribute($key);
	}

	public function setAttribute($key, $value)
	{
		if (!$this->isWritable($key)) {
			throw new \Exception('Property undefined or not writable: '.get_class($this).'::$'.$key);
		}
		parent::setAttribute($key, $value);
	}

	protected function isReadable($key)
	{
		return in_array($key, $this->attr_accessor) || in_array($key, $this->attr_reader);
	}

	protected function isWritable($key)
	{
		return in_array($key, $this->attr_accessor) || in_array($key, $this->attr_writer);
	}
}