PHP foreach on nested array ($_POST)

Question

I have an order form that uses the same name for each row item, an example below:

<input name="item['1']['stock_code']">
<input name="item['1']['quantity']">

<input name="item['2']['stock_code']">
<input name="item['2']['quantity']">

I am iterating over each of the $_POST item's like so:

$items = $_POST['item'];

foreach($items as $item){

    $item_stock_code = $item['stock_code'];
    $item_description = $item['description'];
    $item_price_net = $item['sale_price'];
    $item_quantity = $item['quantity'];
    $item_notes = $item['order_notes'];

}

However, I am now receiving an error when trying to access each property of an undefined index.

An example of print_r($item) is below:

Array
(
    ['stock_code'] => PLN-10002J
    ['quantity'] => 2
    ['description'] => 5MM-20MM TRANSFER CENTRE PUNCH (PLN-10002J)
    ['sale_price'] => 24.35
    ['order_notes'] => testt
)

Where am I going wrong, trying to access the values of each item?

@u_mulder... Notice: Undefined index: stock_code is the error, along with the same for description, sale_price, quantity and order_notes. — MikeF
– MikeF, Commented Aug 15, 2015 at 19:53
@u_mulder... Yes, the line it says the error is on ties up with the foreach loop — MikeF
– MikeF, Commented Aug 15, 2015 at 19:54
@mario... Can you please submit that as an answer please? Removing the single quotes has resolved the issue. — MikeF
– MikeF, Commented Aug 15, 2015 at 20:02

mario · Accepted Answer · 2015-08-15 20:04:15Z

2

If your form names contain single quotes around the keys like that:

<input name="item['1']['stock_code']">
<input name="item['1']['quantity']">

Then PHP will retain them as literal array keys, including the quotes.
So you had to access entries with:

#              ↓        ↓
$_POST["'1'"]["'stock_id'"]
// Notice the double/single quote combos.

So, yes, it's best to remove the ' quotes from the the form field names=, so PHP constructs standard array keys.

answered Aug 15, 2015 at 20:04

mario

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