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Opauth is a multi-provider authentication framework for PHP, inspired by OmniAuth for Ruby.

Opauth enables PHP applications to do user authentication with ease.

Try out Opauth for yourself at

Build Status

What is Opauth?

Opauth provides a standardized method for PHP applications to interface with authentication providers.

Opauth as a framework provides a set of API that allows developers to create strategies that work in a predictable manner across PHP frameworks and applications.

Opauth is designed works well with other PHP applications & frameworks.
It is currently supported on vanilla (plain) PHP applications (of course), CakePHP, Yii Framework and more to come.
If your PHP framework of choice is not yet listed, you can still use Opauth like you would a normal PHP component (class).

Quick start

Guide on how to run the bundled example.

  1. Set DocumentRoot of your web server to example/.
    (Opauth can be instantiated in your own PHP app, but we will leave that out of this quick start guide)

  2. Configure Opauth
    cp example/opauth.conf.php.default example/opauth.conf.php
    and make the necessary changes.

  3. Install some Opauth strategies. We recommend that you start with Opauth-Facebook

    Place the strategy files in lib/Opauth/Strategy/.
    For example, for Opauth-Facebook, place the downloaded files at lib/Opauth/Strategy/Facebook/.

  4. Send user to http://path_to_opauth/facebook to authenticate.

Check out the wiki for more in-depth details, especially on how to use Opauth with your own PHP application.

Available strategies

A strategy is a set of instructions that interfaces with respective authentication providers and relays it back to Opauth.


Generic strategy: OAuth

Opauth is a relatively new framework, having only released its v0.1.0 in late May 2012.
We need your help in expanding the list of available strategies. Refer to strategy contribution guide if you would like to contribute a strategy. Do notify us if you have developed an Opauth strategy and would like it to be listed.


PHP 5 (>= 5.2)


Opauth needs your contributions, especially the following:

  • More strategies
    Refer to wiki for contribution guide and inform us when your work is ready.

  • Plugins for more PHP frameworks and CMSes
    eg. CodeIgniter, Symfony, WordPress, Drupal, etc.

  • Guides & tutorials
    On how to implement Opauth on CakePHP app, etc.

  • Unit testing
    Coverage is only average at the moment.

Issues & questions

Used Opauth in your project? Let us know!


v0.3.0 (30 May 2012)

  • Some unit testing
  • More consistent naming of Strategy's internal properties
  • Smarter loading of strategy, able to make a few guesses on where the class file might be at.

v0.2.0 (23 May 2012)

  • Opauth is now Composer compatible and listed on Packagist
    • Opauth now supports autoloaders
    • If a strategy is not autoloaded, Opauth falls back and searches for it at strategy_dir defined in config.
  • Class name for strategy Foo should now be FooStrategy instead of Foo.
    • This is to reduce the likelihood of class name collision due to Opauth not requiring the use of namespace.
    • v0.1.0-type class name, ie. Foo, still works, but is now deprecated.

v0.1.0 (22 May 2012)

  • Initial release


The MIT License
Copyright © 2012 U-Zyn Chua (


U-Zyn Chua is a Principal Consultant at gladlyCode, a premier PHP web development firm.
If you need consultation in web technologies and services, feel free to talk to us.

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