What is "public $var" OR "public function"

[celebx]

Is it a PHP 5 feature?

class spiderScraper
{
	public $ch;    // will initialize curl handle in __construct
	public $timeDelay = 50000; //5/100 of a second delay just to reduce server nasties
	public $timeStart;
	public $timeLapsed;
...

[Installer]

PHP5 Visibility