Flarum\Core\Command\RegisterUserHandler::saveAvatarFromUrl PHP Метод

    private function saveAvatarFromUrl(User $user, $url)
    {
        $tmpFile = tempnam($this->app->storagePath() . '/tmp', 'avatar');
        $manager = new ImageManager();
        $manager->make($url)->fit(100, 100)->save($tmpFile);
        $mount = new MountManager(['source' => new Filesystem(new Local(pathinfo($tmpFile, PATHINFO_DIRNAME))), 'target' => $this->uploadDir]);
        $uploadName = Str::lower(Str::quickRandom()) . '.jpg';
        $user->changeAvatarPath($uploadName);
        $mount->move('source://' . pathinfo($tmpFile, PATHINFO_BASENAME), "target://{$uploadName}");
    }