Just a recruitment propaganda piece.
And actually what #1 tells me: "Come to Facebook, and have your share of ever growing giant smoking unmaintainable pile of (php) code."
php is maintainable if you actually know it and not just put it on a resume, Drupal runs the whitehouse.gov, Wordpress runs 15% of all sites and Facebook has the largest member base in mankind history, PHP is not hieroglyphics it is actually has roots from C...
