PHP-de massiwlary tersine öwürmek

Задание 1

Massiw berlen:

php<?php
  $arr = ['a' => 1, 'b' => 2, 'c' => 3];
?>

Onda açarlar we bahalary çalyşyryň.

Задание 2

Massiw berlen:

php<?php
  $arr = [1, 2, 3, 4, 5];
?>

Ondan aşakdaky massiw ýasalyň:

php<?php
  [5, 4, 3, 2, 1]
?>