Give two arrays(can be multi dimensional) that have the same structure of keys. Return a value of the two where array 2 raplaces the values of array 1 if the returned value of the specific callback is truthy.

array_replace_recursive_user.php

function array_replace_uwalk($array1, $array2, $callbackArray)
    {
      $result = $array1;
      array_walk($result, function (&$array1Item, $key) use ($array2, $callbackArray)
      {
        $array2Item = $array2[$key];
        if (is_array($array1Item) && is_array($array1Item))
        {
          $array1Item = array_replace_uwalk($array1Item, $array2Item, $callbackArray);
        }else{
          if(array_key_exists($key, $callbackArray)){
            $res = call_user_func($callbackArray[$key],$array1Item, $array2Item);
            if($res) $array1Item = $res;
          }
        }
      });
      return $result;
    }