Use array_multisort() with custom function

Question

I have the following array and I would like to sort it according another array and not DESC or ASC

$array = array(
    \'note\' => a         


        

Answer 1

If you know the depth of the array you can simply apply usort on each array element to be sorted.

Here is an example which orders according to a custom array:

 array_search($b, $order);
    });
}
unset($value);

var_dump($array);
/*
array(2) {
  [0]=>
  array(4) {
    [0]=>
    string(5) "first"
    [1]=>
    string(6) "second"
    [2]=>
    string(5) "third"
    [3]=>
    string(6) "fourth"
  }
  [1]=>
  array(2) {
    [0]=>
    string(5) "first"
    [1]=>
    string(6) "second"
  }
}
*/

If you don't know how deep the array can go, the only solution that comes to my mind is a recursive function:

 array_search($b, $order);
            });
        }
    }
    return $array;
}

$array = custom_multisort($array, $order);

var_dump($array);
/*
array(2) {
  [0]=>
  array(4) {
    [0]=>
    string(5) "first"
    [1]=>
    string(6) "second"
    [2]=>
    string(5) "third"
    [3]=>
    string(6) "fourth"
  }
  [1]=>
  array(2) {
    [0]=>
    array(2) {
      [0]=>
      string(5) "first"
      [1]=>
      string(6) "second"
    }
    [1]=>
    array(2) {
      [0]=>
      string(5) "third"
      [1]=>
      string(6) "fourth"
    }
  }
}
*/