Shopping Cart AGAIN

NeedaCart

Im just tried to create a shopping cart and i am going round im circles because the few major problems.

Let me explain what i am trying to do.

I want to add items to a shopping basket but i dont know how to look up the last item in that array so it can add an icreasment of 1 so every item is unique.

Heres my VERY basic script, and im not even sure im heading in the right direction!

<?php
session_start();

if (isset($POST['submit']))
{
$productid = $POST['productid'];
$itemindex = 0;

if ($itemindex < 1)
{
//creates a basket and adds an item
$session['cart']['itemid'][$itemindex] = $productid;
$itemindex++;
$session['cart']['itemid'][$itemindex];
}
else
{
//just adds item;
$itemindex++;
$session['cart']['itemid'][$itemindex] = $productid;
}
echo $session['cart']['itemid'][1];
}
?>
<FORM METHOD='post' ACTION='cart.php'>
<INPUT TYPE='text' NAME='productid' SIZE='10'>
<INPUT TYPE='submit' NAME='submit' VALUE='Add'>

Also i would like to create a loop which lists all the values the array but i not sure how to do that. I tried but it was one of those never ending ones!

I read about the foreach command but when i tried it said i didnt have an array which makes me even more confused.

Could someone who really knows their stuff show me where im going wrong a provide me with a rough example, THANKS!! 🙂

devinemke

a very basic example:

<?php
session_start();

if (isset($_POST['submit']) && $_POST['submit'] == 'add')
{
	$product_id = trim($_POST['product_id']);
	if ($product_id)
	{
		if (isset($_SESSION['cart'][$product_id])) {$_SESSION['cart'][$product_id]++;}
		else {$_SESSION['cart'][$product_id] = 1;}
	}
}
?>

<html>
<head>
<title>cart</title>
</head>
<body>

<form action="" method="POST">
product ID: <input type="text" name="product_id">
<input type="submit" name="submit" value="add">
</form>
<br>

<?php
if (isset($_SESSION['cart']) && $_SESSION['cart'])
{
	echo 'your shopping cart has ' . count($_SESSION['cart']) . ' product(s):<br>';
	ksort($_SESSION['cart']);
	foreach ($_SESSION['cart'] as $key => $value)
	{
		echo 'product: ' . $key . ' | quantity: ' . $value . '<br>';
	}
}
?>

</body>
</html>

NeedaCart

thanks for the example its set me off in the right direction. Only one more question though.

I can see it stores the quantity in the product_id array

$_SESSION['cart'][$product_id] = 1

but that format doesnt seem to be very friendly in add any more value, like size, etc. could someone please show me how to achieve this.

I think it would be something like this

$SESSION['cart'] [$id] ['productid'] = $productid
$SESSION['cart'] [$id] ['quantity'] = $quantity
$_SESSION['cart'] [$id] ['size'] = $size

Is this right??

devinemke

NeedaCart wrote:
Is this right??

yes

NeedaCart

Im stuck again!

If the product already exists i want to update that array but just replacing the value but i need to get $id to remember where it is.

Im getting the vibe that this could be achieved by storing all the $id varaibles in an array and querying that to see if the a $id is there, i.e. any products. Could someone plase show me how to do this, THANKS!!

<?php
session_start();
if (isset($POST['submit']) && $POST['submit'] == 'add')
{
$productid = trim($POST['productid']);
$quantity = trim($POST['quantity']);
$size = trim($_POST['size']);

if ($productid) 
{ 
	if (isset($_session['cart'][$id]['product']))
	{
	$_session['cart'][$id]['productid'] = $productid;//i think i should delete this one as it wont need updating
	$_session['cart'][$id]['quantity'] = $quantity;
	$_session['cart'][$id]['size'] = $size;
	} 
		else
		{
		$id = count($_session['cart'];
		$id++;
		$_session['cart'][$id]['productid'] = $productid;
		$_session['cart'][$id]['quantity'] = $quantity;
		$_session['cart'][$id]['size'] = $size;
		} 
}

}
?>