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PHP extension for V8 JavaScript engine


PHP extension for V8 JavaScript engine

Build Status GitHub license

This extension is for PHP 7 only.

This extension is still under heavy development and its public API may change without any warning. Use at your own risk.


php-v8 is a PHP 7.x extension that brings V8 JavaScript engine API to PHP with some abstraction in mind and provides an accurate native V8 C++ API implementation available from PHP.

Key features: - provides up-to-date JavaScript engine with recent ECMA features supported; - accurate native V8 C++ API implementation available from PHP; - solid experience between native V8 C++ API and V8 API in PHP; - no magic; no assumptions; - does what it is asked to do; - hides complexity with isolates and contexts scope management under the hood; - provides a both-way interaction with PHP and V8 objects, arrays and functions; - execution time and memory limits; - multiple isolates and contexts at the same time; - it works;

With this extension almost everything that the native V8 C++ API provides can be used. It provides a way to pass PHP scalars, objects and functions to the V8 runtime and specify interactions with passed values (objects and functions only, as scalars become js scalars too). While specific functionality will be done in PHP userland rather than in this C/C++ extension, it lets you get into V8 hacking faster, reduces time costs and gives you a more maintainable solution. And it doesn’t make any assumptions for you, so you stay in control, it does exactly what you ask it to do.

With php-v8 you can even implement nodejs in PHP. Not sure whether anyone should/will do this anyway, but it’s doable.

NOTE: Most, if not all, methods are named like in the V8 API - starting from capital letter. This PSR violation is done intentionally with the purpose to provide a more solid experience between the native V8 C++ API and the V8 PHP API.


Here is a Hello World from V8 Getting Started developers guide page implemented in PHP with php-v8:

$isolate = new \V8\Isolate();
$context = new \V8\Context($isolate);
$source = new \V8\StringValue($isolate, "'Hello' + ', World!'");

$script = new \V8\Script($context, $source);
$result = $script->Run($context);

echo $result->ToString($context)->Value(), PHP_EOL;

which will output Hello, World!. See how it’s shorter and more readable than that C++ version? And it also doesn’t limit you from V8 API utilizing to implement more amazing stuff.

Stub files

If you are also using Composer, it is recommended to add the php-v8-stub package as a dev-mode requirement. It provides skeleton definitions and annotations to enable support for auto-completion in your IDE and other code-analysis tools.

composer require --dev pinepain/php-v8-stubs


Quick guide


$ sudo add-apt-repository -y ppa:ondrej/php
$ sudo add-apt-repository -y ppa:pinepain/php
$ sudo apt-get update -y
$ sudo apt-get install -y php7.0 php-v8
$ php --ri v8

OS X (homebrew)

$ brew tap homebrew/dupes
$ brew tap homebrew/php
$ brew install php70
$ brew install
$ brew install
$ php --ri v8



You will need a recent v8 Google JavaScript engine version installed. At this time the extension is tested on 5.4.420.

   $ sudo add-apt-repository -y ppa:pinepain/libv8-5.4
   $ sudo apt-get update -y
   $ sudo apt-get install -y libv8-5.4-dev
  • For OS X there is the v8.rb homebrew formula. To install libv8:
   $ brew install


To install php7.0:

   $ sudo add-apt-repository -y ppa:ondrej/php
   $ sudo apt-get update -y
   $ sudo apt-get install -y php7.0
  • For OS X there is the homebrew/homebrew-php tap with php70, php71 and a large variety extensions for them.

To install php70:

   $ brew tap homebrew/homebrew-php
   $ brew install php70

Installing php-v8 from packages

To install php-v8:

   $ sudo add-apt-repository -y ppa:pinepain/php-v8
   $ sudo apt-get update -y
   $ sudo apt-get install -y php-v8

To install php70-v8 do:

   $ brew install

Building php-v8 from sources

git clone
cd php-v8
phpize && ./configure && make
make test

To install extension globally run

$ sudo make install

Developers note

  • to be able to customize some tests make sure you have variables_order = "EGPCS" in your php.ini

  • export DEV_TESTS=1 allows to run tests that are made for development reasons (e.g. test some weird behavior or for debugging)

  • To prevent the test suite from asking you to send results to the PHP QA team do export NO_INTERACTION=1

  • To track memory usage you may want to use smem, pmem or even lsof to see what shared object are loaded and free to display free and used memory in the system.


Copyright © 2015-2016 Bogdan Padalko &lt;[email protected]&gt;

php-v8 PHP extension is licensed under the MIT license.

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