PHP Sort a multidimensional array by element containing date

Question

I have an array such as:

Array
(
[0] => Array
    (
        [id] => 2
        [type] => comment
        [text] => hey
        [datetime] => 20         


        

Answer 1

This should work. I converted the date to unix time via strtotime.

  foreach ($originalArray as $key => $part) {
       $sort[$key] = strtotime($part['datetime']);
  }
  array_multisort($sort, SORT_DESC, $originalArray);

---

One-liner version would be using multiple array methods:

array_multisort(array_map('strtotime',array_column($originalArray,'datetime')),
                SORT_DESC, 
                $originalArray);