Loader to find classes that have not been preloaded

NotPreladerdFinder.php

<?php
// preloadされていないクラスを見つけるローダー

$notPreloaded = new ArrayObject();
spl_autoload_register(function (string $class) use ($notPreloaded) {
    $notPreloaded[] = $class;
},
    true,
    true
);

error_log(print_r($notPreloaded, true);