PHP - get multiple columns from array

Question

I have this array:

0 => array:3 [
    \"product_id\" => \"1138\"
    \"product_image\" => \"/resources/medias/shop/products/shop-6500720--1.png\"
           


        

Answer 1

If I understand your question correctly, you could try a traditional foreach - it might be a little faster.

function colsFromArray($array, $filterKeys) {
    $newArr = [];
    foreach($array as $key => $val) {
       $element = [];
       foreach($filterKeys as $filterKey) {
          $element[$filterKey] = $val[$filterKey];
       }
       $newArr[] = $element;
    }
}

(Not tested)

The problem is that it seems too laggy, since it iterates twice over this

Your original code isn't iterating twice over the same array. You won't be able to get around iterating over the main array and then the filterKeys array if you want to have an array where each element is another array of elements with keys from the filterKeys array.