This is an simple demo, using johnroyer/crawler-php to get pages from my site.

Steps to create a crawler using johnroyer/crawler-php:

1. composer require johnroyer/crawler-php:^0.3
2. implement Crawler\Handler\AbstractHandler for domain will be crawled
3. create crawler by new Crawler()
4. add handlers to crawler
5. run()

open file scan to see example codes.