What am I missing here, the constructor function is being completey ignored... the variables are empty and it doesn't echo the test strings.

Code:
	class cart
	{
	
		var $item;
		var $started;
		var $max_qty;
		var $symbol;
		
		function cart()
		{
			$this->started = time();
			$this->max_qty = 0;
			$this->symbol = "£";
			echo "<h1>test</h1>";
			echo "<h1>test</h1>";
			echo "<h1>test</h1>";
		}