scottmac/opengraph — pull request #24 by martinstuecklschwaiger (2014-08-04 13:50:46+00:00)
Title: Use the facebook user-agent instead of $_SERVER

The $_SERVER globals may not be present (e.g. when using cronjobs, etc.).
Using "facebookexternalhit" scraped pages will behave the same as to the original facebook scraper