
options = func_get_args();
		$this->num_options = count($this->options);
		if( is_array($this->options[0]) )
		{
			$this->options = $this->options[0];
			$this->num_options = count($this->options);
		}
		$this->idx = 0;
	}
	public function __toString()
	{
		$ret = $this->options[$this->idx++];
		if( $this->idx >= $this->num_options ) $this->idx = 0;
		return $ret;
	}
}

//usage
$cycle = new Cycle('red','green','blue');
echo $cycle; //red
echo $cycle; //green
echo $cycle; //blue
echo $cycle; //red
//outputs redgreenbluered
?>