cart.php

<?php
function cart() {			
	$aProducts = $_SESSION["cart"];
	$sSubTotal = 0;
	
	foreach($_SESSION["cart"] as $aProduct) {
		if (!empty($aProduct["sale_price"]))
			$sSubTotal = $sSubTotal + $aProduct["sale_price"];
		else
			$sSubTotal = $sSubTotal + $aProduct["price"];
	}
	
	$this->tplAssign("aProducts", $aProducts);
	$this->tplAssign("sSubTotal", money_format('%.2n', $sSubTotal));
	$this->tplDisplay("catalog/cart.tpl");
}
function cart_add() {
	$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."));
}
function cart_update() {
	foreach($_POST as $sId => $sQuantity) {
		if ($sQuantity == 0)
			unset($_SESSION["cart"][$sId]);
		else
			$_SESSION["cart"][$sId]["quantity"] = $sQuantity;
	}
	
	$this->forward("/store/cart/?notice=".urlencode("Cart was successfully updated."));
}
function cart_delete() {
	unset($_SESSION["cart"][$this->_urlVars->dynamic["id"]]);
	
	$this->forward("/store/cart/?notice=".urlencode("Product removed from cart."));
}
function cart_empty() {
	$_SESSION["cart"] = null;
	
	$this->forward("/store/cart/");
}