HHVM and Hack Documentation

Hack

Learn

• Getting Started

  Installing Hack, running your first program, and introducing the tools.

• Source Code Fundamentals

  Basic syntax, namespaces, and the autoloader.

• Expressions And Operators

  Expressions, operators, associativity, and precedence.

• Statements

  Simple statements, blocks, and loops.

• Functions

  Named functions, anonymous functions and parameters.

• Classes

  Classes, interfaces and traits.

• Types

  The type checker.

• Built In Types

  Built-in types known to the type checker.

• Generics

  Generic types, where constraints, and variance.

• Asynchronous Operations

  Asynchronous functions, await, and the concurrent keyword.

• Attributes

  Attaching metadata to Hack programs, built-in attributes and defining your own.

• XHP

  Safe, composable HTML templating.

• Silencing Errors

  HH_FIXME best practices and error codes.

Hack API Reference

Full reference docs for all functions, classes, interfaces, and traits in the Hack language.

Hack Standard Library Reference and Experimental Additions

Full reference docs for all functions, classes, interfaces, and traits in the Hack Standard Library (HSL).

HHVM

Learn

• Getting Started

  Get started with HHVM quickly and easily.

• Installation

  How to install HHVM on a supported platform.

• Basic Usage

  The easiest way to run HHVM, with sensible defaults.

• Advanced Usage

  Advanced usage, with more ways to run and configure HHVM.

• Configuration

  How to configure HHVM with various user-configurable options.

• Extensions

  The built in and dynamic extensions that HHVM currently supports.

• FAQ

  Common information and questions regarding HHVM.