Counting the quantity by using the Steam Api - php

Question

I was messing around with the steam API and I found out that I was not able to get the quantity of my items. Lets say I have item A 2 times, it does not show the picture just 1 time with the quantity set to "2", but instead it shows the item twice with the quantity set to 1.
This is the part I use to get the inventory.
$backpackURL = "http://api.steampowered.com/IEconItems_440/GetPlayerItems/v0001/?key=" . $APIkey . "&SteamID=" . $profile . "&format=json";
$schemaURL = "http://api.steampowered.com/IEconItems_440/GetSchema/v0001/?key=" . $APIkey . "&language=en";
$userBackpack = json_decode(file_get_contents($backpackURL), true);
$itemSchema = json_decode(file_get_contents($schemaURL), true);
$backpack_items = $userBackpack['result'];
$schema_items = $itemSchema['result'];
And here I list all the items:
foreach($backpack_items['items'] as $ind=>$backpack_items){
$id = $backpack_items['id'];
$defindex = $backpack_items['defindex'];
$name = getItemName($schema_items, $defindex, $image_url);
$quantity = $backpack_items['quantity'];
$inventory = $backpack_items['inventory'];
echo '
$tmp[] = $backpack_items; print_r($tmp)
';
}

Answer 1

Since there is no ID to see if there are any duplicates, you can try to merge them by name.
By reading this code, it first creates a copy of the main array.
I loop over the main array, then again over the copy. So for each value of the main array, a complete cycle of the array is done again for values to compare against.
Since it is expected that there is atleast 1 name, I don't unset immidiatly, but only after another result is found, hence the $b.
It's quantity is increased if a dupe is found, on the key of the main loop.
$copy = $backpack_items['items'];
foreach($backpack_items['items'] as $k => $v){
$b = false;
$s = '';
$n = getItemName($schema_items, $v['defindex'], $s);
foreach($copy as $k2 => $v2){
if($n == getItemName($schema_items, $v2['defindex'], $s)){
if(!$b){
$b = $k;
} else {
unset($backpack_items['items'][$k2]);
$backpack_items['items'][$k]['quantity'] += 1;
}
}
}
}
// Now use your original loop, and the dupes should be removed.