I would love to see Proxygen integrated as a HackLang extension. Especially the HTTP parser. As far as I know, the PHP world is sorely lacking a robust HTTP parser.
In response to my comment here, I did some more experimentation with pecl_http. Turns out version 2.1.4 looks relatively stable. Just be sure not to make the same mistake I made of referring to the documentation on the php.net website. Instead one should look here for version 2.x documentation:
