Check that website links inside a PDF are valid
usage:
php pdf-link-checker filename.pdf
example output:
[OK] http://ZoomInfo.com
[OK] http://news.google.com
[OK] https://archive.org/web/web.php
[OK] http://zoominfo.com
[OK] http://30x500.com/
[OK] https://www.google.com/search?q=30x500%20safari#q=30x500+%22watering+hole%22