Select Dropdown PHP foreach loop with 'optgroup' options

Question

I have a dropdown menu with a PHP \'foreach\' that I loop through to populate the select options. This works well. However, what I\'d like to do is have various sub labels u

Answer 1

This method does not require sorting the array

    
    $group= array_values(array_unique(array_column($album, 'type')));
             for ($i=0; $i < count($group); $i++) : ?>