With HipHop, Facebook is providing a new runtime that is intended to improve PHP use in large-scale deployments. The HipHop effort, which also includes a new Web server, has already been in use by Facebook for the past six months, though the project is just being made public today.
Facebook developers say the HipHop effort isn’t an attempt to fork the PHP community, but rather, a move to help PHP scale.
Read all the details here: http://www.developer.com/lang/php/article.php/3862461/Facebooks-HipHop-Goes-Public-With-a-New-PHP-Runtime.htm
