match is basically a cleaner, more succinct switch, I hardly ever used switches before, though I use match a LOT.

    switch ($i) {
      case 0:
        echo "i equals 0";
        break;
      case 1:
        echo "i equals 1";
        break;
      case 2:
        echo "i equals 2";
        break;
    }

verses:

    $output = match($i) {
       0 => 'i equals 0',
       1 => 'i equals 1',
       2 => 'i equals 2',
      default => 'i is unknown'
   }

   echo $output;

the result is basically the same, but match is more of an enclosed switch that just returns instead of does side effects, then you can do what you like w/ that.

Ymmv, but match is a great code saver, and is very nice for enums and methods on enums.

Before match i'd probably do something like:

    $output = 'i is unknown';

    if($i == 0){
        return 'i equals 0';
    }

    if($i == 1) {
        return 'i equals 1';
    }

    if ($i == 2) {
        return 'i equals 2';
    }
    return $output;

Not really, I'd probably do..

    if($i) {
        return "i equals {$i}";
    }
    return 'i is unknown';

but the point was if I had to check for multiples to match something, then do something else, that's how I would do it... albeit this is a simple case with a better solution.