Undefined index when accessing multi-dimensional array - php

Question

I am having a multi-dimensional array. When I access it I get undefined index but I just can't see what I am doing wrong. I very much appreciate if someone has a glue as I am devastating for quite some while now. Thanks!
Dump:
Array
(
[922] => Array
(
[products] => Array
(
[169] => http://www.golf-safari.com/golf_regions/cape_town.asp
)
[company] => stdClass Object
(
[id] => 922
[category_id] => 42
[language_id] => 1
[shipping_from_id] => 0
[name] => Golf-Safari.com
[logo] =>
[company_id] => 922
[area_id] => 414
[country_id] =>
[city_id] => 260
[product_id] => 169
[url] => http://www.golf-safari.com/golf_regions/cape_town.asp
[likes] => 0
[dislikes] => 0
[views] => 0
)
)
)
My access code:
<?php foreach($items as $cmp_id => $company):
$item = $company['company']; // throws undefined index company
$item = $company['products']; // throws undefined index product
?>
<div class="title" title="<?= $item->company ?>">
I am not even getting to the div as error is thrown already on $company['company']
Thanks for all the answers! I don't really know whats wrong. Up to now I always assumed that when there is a dump produced then this dump can be accessed, apparently not. I added my preparation code below.
My preparation code:
foreach($rows as $row)
{
if($row->product_id && !in_array($row->product_id, $products)){
array_push($products, $row->product_id);
}
$products_count[$row->product_id][] = '1';
$ids[$row->id] = $row->id; //store every company id, in order to avoid repetitions count variables
$items[$row->id]['products'][$row->product_id] = $row->url; //cities products
$items[$row->id]['company'] = $row;
}
if($products && is_array($products)){
$query = DB::table('products');
$query->select('id', "name_$this->language AS product");
$query->whereIn('id', $products);
$product_names = $query->get();
}
$sub['items'] = array(
'items' => $items,
'product_names'=> $product_names
);

Answer 1

$item = $company['product']; // throws undefined index product
In here you are passing the wrong key use $item = $company['products'];
print_r($company['products']);
In $company['company'] its an object so you can access the values by the following way
echo $company['company']->name;

Answer 2

the array has about 3 layers. i'll go ahead and assume that the $items is the outtermost layer. according to your structure, your code should look like this:
foreach($item[922] as $cmp_id => $company){
$$cmp_id = $company //converts the index of the item[922] into a variable and assign them the values
$item = $$cmp_id['company'];
$item = $$cmp_id['product'];
}
the first $item will hold this value
[company] => stdClass Object
(
[id] => 922
[category_id] => 42
[language_id] => 1
[shipping_from_id] => 0
[name] => Golf-Safari.com
[logo] =>
[company_id] => 922
[area_id] => 414
[country_id] =>
[city_id] => 260
[product_id] => 169
[url] => http://www.golf-safari.com/golf_regions/cape_town.asp
[likes] => 0
[dislikes] => 0
[views] => 0
)
the second one will hold
(
[169] => http://www.golf-safari.com/golf_regions/cape_town.asp
)
they both contain arrays, i don't think you can use them in the div because none of the new $item arrays has an index [company]. to get the innermost arrays, change the codes to
foreach($items[922][company] as $key => $value){ //or $items[922][products]
$$key = $value;
}
you'll get all the values with their indices as the variable name eg
$category_id =42;

Answer 3

In your example you're overwriting $item each time you declare it. Here is a sample of how to loop through the array - http://phpfiddle.org/lite/code/tr0c-u9vh
foreach($items as $comp_id => $company){
$item = $company['products'];
$company_name = $company['company']['name'];
print_r($item); // because this is still an array
echo $company_name; // this is a specific item
}
You could also use PHP's recursive iterator class - http://php.net/manual/en/class.recursiveiteratoriterator.php
$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($items));
foreach($iterator as $key=>$value){
echo $key. "\t" . $value . "\n";
}
In essence by calling it like this you can flatten the array. http://phpfiddle.org/lite/code/5p3h-fb21

Answer 4

foreach(['variable_by_which_get_dump']['922'] as $values)
{
foreach($values as $get_subvalue)
{
foreach($get_subvalue as $get_final_subvalue)
{
echo $get_final_subvalue;
echo '<br>';
}
}
}