PHP sort multidimensional array by other array

Question

I have an array with IDs that looks like

array(
      0  => 12
      1  => 30
      2  => 50
      3  => 11
      4  => 22
      5  => 45
          


        

Answer 1

Assuming the array with the IDs is named $order and the array with the values is named $items:

$keys = array_flip($order);

usort($items, function($a, $b) use($keys)
{
    return $keys[$a['id']] - $keys[$b['id']];
});