Laravel 4 foreach loop - wanting to display the last element

Question

I am currently trying to set up an edit page where an order form is populated using json_decode to decode json information that was saved when the form was created. Because the form's size can change I have to create the correct number of inputs so that all the json data will have a place to be displayed. Fortunately as the inputs are numbered this should not be hard to do. Unfortunately I am not sure how to pick the last element of the json information that has been decoded. Currently I am using:

public function getEdit($id){
        $order = Order::where('id', '=', $id);

        if($order->count()) {
            $order                      = $order->first();
            $order->order_serialized    = json_decode($order->order_serialized);

            foreach($order->order_serialized as $key => $value){
                $order->$key = $value;
            }
            return View::make('orders.edit')
                    ->with('order', $order);
        }   else {
            return App::abort(404);
        }
    }

to decode the information and it is working splendidly but I need to be able to pick up the last element to be able to find the total number of inputs and am not sure how I could do this without disturbing the foreach loop. Any and all help would be greatly appreciated!! Thank you so much!

user1669496 · Accepted Answer · 2014-03-24 21:31:52Z

3

You can use the count and toArray methods to find the last item.

$nItem = $order->count();
$aOrder = $order->toArray();
$aLastItem = $aOrder[$nItem-1];

answered Mar 24, 2014 at 21:31

user1669496

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5 Comments

mario Over a year ago

Thanks! That sounds like its just what I was looking for.

mario Over a year ago

Quick question - it says "Undefined offset: 6 " Any idea what this means?

Dimitrios Kontoulis Over a year ago

are you sure that the indexes of the array are numbers and not column names? Undefined offset 6 means that it was looking for $aOrder[6] which doesn't exist

user1669496 Over a year ago

var_dump($aOrder) and see what the elements look like. Not sure it matters too much though, ceejayoz has a much cleaner answer and I had not realized there was a last() method.

mario Over a year ago

Sorry I didn't see that there were comments on this. I dd($aOrder) and saw that it had all the inputs listed which is great. I looked at dd($nItem) and noticed it was 7 even though there were more items than that, so I'll have to look at that later. But thanks again!

ceejayoz · Accepted Answer · 2014-03-24 21:33:51Z

3

Collections have a last() function to compliment the first() function.

answered Mar 24, 2014 at 21:33

ceejayoz

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4 Comments

mario Over a year ago

I tried using last() like this foreach($order->order_serialized as $key => $value){ $order->$key = $value; if($order->$key->last()){ $last_element = $order->$key; } ; } but the debug said I was trying to use it on a non-object.

Dimitrios Kontoulis Over a year ago

not in the foreach loop , outside of it, like $order->last() is the last row of your $order object

mario Over a year ago

Sorry I didn't see your comment earlier. This looks great. I just have a quick question. In my database all of the form's input is stored in a "order_serialized" row in json_encoded info. To get to it I was thinking of using: $order->order_serialized = json_decode($order->order_serialized); $last_item = $order->order_serialized->last();

mario Over a year ago

But that returns "Call to undefined method stdClass::last() ", any idea where I'm going wrong?

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