PHP7 function/method signature overloading

overload.php

<?php
declare(strict_types=1);

function overload(callable ...$implementations): callable
{
    return function (...$args) use ($implementations) {
        $error = new \LogicException('Invalid overloaded implementations');
        foreach ($implementations as $candidate) {
            try {
                return $candidate(...$args);
            } catch (\TypeError $e) {
                $error = $e;
            }
        }
        throw $error;
    };
}

Released the overloading implementation as a Composer package:
https://github.com/upscalesoftware/stdlib-overloading