Can PHP's so-called "closures" do any real closure work, like a revealing module? http://addyosmani.com/resources/essentialjsdesignpatterns/book/#revealingmodulepatternjavascript

revealing-module1.php

<?php

function constructTotalizer() {
    $privateTotal = 0;

    $privateAddTotal = function ($n) use (&$privateTotal) {
        $privateTotal += $n;
    };

    $publicAddTotal = function ($n) use ($privateAddTotal) {
        $privateAddTotal($n);
    };

    $publicIncremenet = function () use ($publicAddTotal) {
        $publicAddTotal(1);
    };

    $publicGetTotal = function () use (&$privateTotal) {
        return $privateTotal;
    };

    $that = new stdClass();
    $that->add = $publicAddTotal;
    $that->inc = $publicIncremenet;
    $that->get = $publicGetTotal;

    return $that;
};

$totalizer = constructTotalizer();

var_dump($totalizer);

$totalizer->add(2);
$totalizer->inc();
echo $totalizer->get() . "\n";

revealing-module2.php

<?php

function constructTotalizer() {
    $privateTotal = 0;

    $privateAddTotal = function ($n) use (&$privateTotal) {
        $privateTotal += $n;
    };

    $publicAddTotal = function ($n) use ($privateAddTotal) {
        $privateAddTotal($n);
    };

    $publicIncremenet = function () use ($publicAddTotal) {
        $publicAddTotal(1);
    };

    $publicGetTotal = function () use (&$privateTotal) {
        return $privateTotal;
    };

    $that = [
        'add' => $publicAddTotal,
        'inc' => $publicIncremenet,
        'get' => $publicGetTotal,
    ];

    return $that;
};

$totalizer = constructTotalizer();

var_dump($totalizer);

$totalizer['add'](2);
$totalizer['inc']();
echo $totalizer['get']() . "\n";