Add to cart only if user is logged in??

mikebyrne · April 8, 2008

At present when the user clicks add to cart the product automatically goes into the shopping cart. Is there a way I can chack to see if the user has logged on before the varibles are passed onto the cart??

For example each page would have a session start() and a typical "ADD TO CART" button would be codded like this:

<td align="center"><a href="cart.php?action=add&id=17"><img src="http://images-cache.cd-wow.com/images/testdev/cdw_tdev_atc_v1_red.gif" class="cartimg" border="0" title="COLDPLAY - Viva La Vida - Add to cart!" alt="COLDPLAY - Viva La Vida - Add to cart!" height="16" width="60"></a>

My shopping cart looks like:

<?php
// Include MySQL class
require_once('mysql.class.php');
// Include database connection
require_once('global.inc.php');
// Include functions
require_once('functions.inc.php');
// Start the session
session_start();
// Process actions
$cart = $_SESSION['cart'];
$action = $_GET['action'];
switch ($action) {
case 'add':
	if ($cart) {
		$cart .= ','.$_GET['id'];
	} else {
		$cart = $_GET['id'];
	}
	break;
case 'delete':
	if ($cart) {
		$items = explode(',',$cart);
		$newcart = '';
		foreach ($items as $item) {
			if ($_GET['id'] != $item) {
				if ($newcart != '') {
					$newcart .= ','.$item;
				} else {
					$newcart = $item;
				}
			}
		}
		$cart = $newcart;
	}
	break;
case 'update':
if ($cart) {
	$newcart = '';
	foreach ($_POST as $key=>$value) {
		if (stristr($key,'qty')) {
			$id = str_replace('qty','',$key);
			$items = ($newcart != '') ? explode(',',$newcart) : explode(',',$cart);
			$newcart = '';
			foreach ($items as $item) {
				if ($id != $item) {
					if ($newcart != '') {
						$newcart .= ','.$item;
					} else {
						$newcart = $item;
					}
				}
			}
			for ($i=1;$i<=$value;$i++) {
				if ($newcart != '') {
					$newcart .= ','.$id;
				} else {
					$newcart = $id;
				}
			}
		}
	}
}
$cart = $newcart;
break;
}
$_SESSION['cart'] = $cart;
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>PHP Shopping Cart Demo &#0183; Cart</title>
<link rel="stylesheet" href="styles.css" />
</head>

<body>

<div id="shoppingcart">

<h1>Your Shopping Cart</h1>

<?php
echo writeShoppingCart();
?>

</div>

<div id="contents">

<h1>Please check quantities...</h1>

<?php
echo showCart();
?>

<p><a href="login.php">Back to shop...</a></p>

</div>

</body>
</html>

westminster86 · April 8, 2008

Im assuming uve created one or more session variables upon loggin in. Try the following

if (isset($_SESSION['elementname'])) {

// add to cart

}

else {

// redirect user to login page

}

Check to see if the session variable is set, if not use 'header' to redirect the user to the login page.

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Add to cart only if user is logged in??

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