<?php
$numbers = $objectWrappers->wrap($arrays->arrayOf($plugins->loadClass("java.lang.Long"), 1, 2, 3, 4, 5));
// 从右到左计算所有元素的差值
$difference = $numbers->foldRight(0, function ($element, $acc) {
    return $element - $acc;
});
// 输出：差值: 3
$console->log("差值: ", $difference);