Please look at this...

kerkor

I have a session string containing shopping cart product ids and quantities. For example, the cart session var looks like this: 11 3|12 1| 18 1| 18 1 |.

I want to combine duplicate items with the actual total desired so that in the cart view area there is only one line item per product.

Frist I am trimming the last char which is the "|" or I get an empty array element. I am then exploding that session string by | and then for each item that generates I am exploding (ex. 11 3) by " ". I am then creating 4 arrays:
for ($i = 0; $i < count($cart); $i++) {
echo "<BR>Cart Items" . $cart[$i]; $iq = explode (" ", $cart[$i]);
//keep safe arrays
$itemArray[$i] = $iq[0];
$qtyArray[$i] = $iq[1];
//arrays to play
$itemArray2[$i] = $iq[0];
$qtyArray2[$i] = $iq[1];
}

I am then creating a new array with the duplicate indexes in itemArray2. I am creating yet another array for the keys of this new array.

$checkKeysUniqueComparison = create_function('$value','if ($value > 1) return true;');
$result = array_keys (array_filter (array_count_values($itemArray2), $checkKeysUniqueComparison));
$keys = array_keys($result);

Then based on the count of the array $results I am creating an array of index...Anyways this goes on for a while and it fail miserably.

I need to be able to combine the duplicate items and total up the real quantities and then write the cart string back to the session variable in this format 11 3|12 1| 18 1| 18 1 |.

It can't be as hard as I am trying to make it. If anyone could shed some light on this, I would be totally grateful. Thanks for you consideration. I really appreciate it.

mtmosier

Since you like arrays so much why aren't you storing these values in the session as an array instead of a string? It'd save you a lot of trouble I'd think.

Anyway, here's my attempt at it.

function combineItems($string) {
    $tmparr = array();

$itemstrarr = explode('|', $string);
foreach ($itemstrarr as $itemstr) {
    if (empty($itemstr))  continue;

    $itemarr = explode(' ', $itemstr);
    if (empty($itemarr[0]))  continue;

    $tmparr[$itemarr[0]] += $itemarr[1];
}

$rtnstr = '';
foreach ($tmparr as $id => $qty) {
    $rtnstr .= $id.' '.$qty.'|';
}
return $rtnstr;
}

kerkor

I just kept spinning my wheels. Thanks, I am back to work! 🙂

kerkor

I did get you code help working and it works great.

However, I have decided a session array would work best because I will soon need to figures subtotals, tax, price, etc. I am going to also have a button that recalculates totals based on if a customer changes the quantity as well as a button to completely remove an item. This all would be much easier creating an array rather than parsing a string a ton of times.

My only problem...I have no ideas how to create and access the session variable. This array would once again need to be cleansed for duplicates as well as leave one item with the qty total of all dups.

$_SESSION['cart'] = an array with key being prod_id and value being qty

What is the correct form for this? I appreciate it so very much.

KK:eek:

Nate

$_SESSION['cart'] = an array with key being prod_id and value being qty

$_SESSION['cart']['prod_id'] = $qty;