How to implode subarrays in a 2-dimensional array?

Question

I want to implode values in to a comma-separated string if they are an array:

I have the following array:

$my_array = [
    \"keywords\" => \"test         


        

Answer 1

Just create a new array and set the elements (-;

 $value)
     $new_array[$key] = is_array($value) ? implode(",", $value) : $value;