This is the repo for the HHVM and Hack user documentation.

Contributions and feedback are welcome. If you see anything broken, please file an issue.

Structure

There are three keys areas to this repo:

• User Documentation: The guides. We realized that finding out how to do simple things like setting up HHVM to more complicated things like using async were more tedious than they should be. The documentation should be a friend, not a nuisance.
• API Reference: We use our own HHVM code documentation for Hack and HHVM specific API documentation. And for anything PHP specific, we defer to php.net. This serves two purposes:
  • The HHVM source code is the source of truth
  • We don't duplicate PHP documentation, and their documentation will serve as the source of truth for PHP-specific documentation
• Infrastructure: An easier, more modular and scalable way for documentation. Markdown for user-guide content. Easy to follow, Hack-based source code for building the site.

Check out the source code for building the site. bin/build.php is where all the execution begins.