cart_add.php

<?php
function cart_add() {
	if (empty($_SESSION["cart"]))
		$_SESSION["cart"] = array();
	
	$aProduct = $this->model->getProduct($this->_urlVars->dynamic["id"]);
	
	if (array_key_exists($aProduct["id"], $_SESSION["cart"])) {
		$_SESSION["cart"][$aProduct["id"]]["quantity"]++;
	} else {
		$aProduct["quantity"] = 1;
		$_SESSION["cart"][$aProduct["id"]] = $aProduct;
	}
	
	$this->forward("/store/cart/?notice=".urlencode($aProduct["title"]." added to cart."));
}