This package downloads a HTML part of a web page and follows its links to download related pages into ./storage directory.
php ./composer.phar install
php bin/app.php --url=https://spiegel.de
By default, it downloads 100 pages with 5 parallel processes.
To change that, provide additional CLI arguments:
php bin/app.php --url=https://spiegel.de --max-pages=500 --max-processes=30