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A virtual machine for executing programs written in Hack.
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vassilmladenov and hhvm-bot Add coercion for parent:: calls to instance methods
Reviewed By: Matt-Schellhas

Differential Revision: D15831095

fbshipit-source-id: d953bedb2a0d1327f1a93eefafac95038ba88a89
Latest commit 16640ed Jun 17, 2019

README.md

HHVM

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HHVM is an open-source virtual machine designed for executing programs written in Hack. HHVM uses a just-in-time (JIT) compilation approach to achieve superior performance while maintaining the development flexibility that PHP provides.

HHVM is intended for Hack projects, and also supports a large subset of PHP 7 that is required by common tools and libraries. We no longer recommend using HHVM for purely PHP projects.

HHVM should be used together with a webserver like the built in, easy to deploy Proxygen, or a FastCGI-based webserver on top of nginx or Apache.

Installing

If you're new, try our getting started guide.

You can install a prebuilt package or compile from source.

Running

You can run standalone programs just by passing them to hhvm: hhvm example.hack.

If you want to host a website:

  • Install your favorite webserver. Proxygen is built in to HHVM, fast and easy to deploy.
  • Install our package
  • Start your webserver
  • Run sudo /etc/init.d/hhvm start
  • Visit your site at http://.../main.hack

Our getting started guide provides a slightly more detailed introduction as well as links to more information.

Contributing

We'd love to have your help in making HHVM better. If you're interested, please read our guide to contributing.

License

HHVM is licensed under the PHP and Zend licenses except as otherwise noted.

The Hack typechecker is licensed under the MIT License except as otherwise noted.

Reporting Crashes

See Reporting Crashes for helpful tips on how to report crashes in an actionable manner.

Security

For information on reporting security vulnerabilities in HHVM, see SECURITY.md.

FAQ

Our user FAQ has answers to many common questions about HHVM, from general questions to questions geared towards those that want to use.

There is also a FAQ for contributors to HHVM.

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