<?php

namespace ClassLoaderTest;

use function spl_autoload_register;
use function spl_autoload_unregister;

class ExternalLoader
{
    public static function registerStatic()
    {
        spl_autoload_register([self::class, 'load1']);
        spl_autoload_register([self::class, 'load2']);
        spl_autoload_register(self::class . '::load3');
    }

    public static function unregisterStatic()
    {
        spl_autoload_unregister([self::class, 'load1']);
        spl_autoload_unregister([self::class, 'load2']);
        spl_autoload_unregister(self::class . '::load3');
    }

    public static function load1()
    {
    }

    protected static function load2()
    {
    }

    protected static function load3()
    {
    }

    public function register()
    {
        spl_autoload_register([$this, 'load4']);
        spl_autoload_register([$this, 'load5']);
    }

    public function unregister()
    {
        spl_autoload_unregister([$this, 'load4']);
        spl_autoload_unregister([$this, 'load5']);
    }

    public function load4()
    {
    }

    protected function load5()
    {
    }
}