n-e-m-a-nj-a

<?php

final class ProductId
{
    private $id;

    public function __construct(string $id)
    {
        $this->id = $id;
    }

n-e-m-a-nj-a

<?php

/**
 * SplClassLoader implementation that implements the technical interoperability
 * standards for PHP 5.3 namespaces and class names.
 *
 *     // Example which loads classes for the Doctrine Common package in the
 *     // Doctrine\Common namespace.
 *     $classLoader = new SplClassLoader('Doctrine\Common');
 *     $classLoader->register();