How to extend array structure in nested loop? - php

Question

I have an array with products, filled by the API.
I want to extend it and add some values like categories, price. I tried to add & before the array when looping to use it by reference row. But when I added another while loop to add categories, the $row wasn't extended.
$products = array('id_product'=>12,'link'=>'test.html','description'=>'desc');
foreach($products as &$row) {
$row['price'] = 12;
$product = new Product($row['id_product'];
$categories = $product::getCategories();
$k = 1;
while ($cat = current($categories)){
$row['categoryid'.$k] = $cat['name'];
$k++;
}
}
$product::getCategories() return
array(1) { [0]=> array(1) { ["name"]=> string(8) "T-shirts" } }
The problem is that the array key with categoryid.$k is never created, I tried with foreach on categories but it didn't work.

Answer 1

In provided example in foreach loop $row will contains values 12, 'test.html' and 'desc'. So you can't use them as array.
Valid code:
$products = array();
$products[] = array('id_product'=>12,'link'=>'test.html','description'=>'desc');
Also you have invalid while loop, replace current function with array_shift, or use proper foreach loop
Edited:
Replace while with this code:
if (!empty($categories)) {
foreach ($categories as $key => $category) {
$row['categoryid' . $key] = $category['name'];
}
}

Answer 2

I fixed my problem by adding a function and pass by value the row parameter
private function addCategories(&$row){
$categories = $this->getProductCategoriesFull((int)$row['id_product']);
if (!empty($categories)) {
$k = 2;
foreach($categories as $category) {
if($k!= 2)
$row['categoryid' . ($k-1)] = $category['name'];
$k++;
if($k>5) exit;
}
}
}
And call it in the loop
$this->addCategories($row);