Open Authentication has evolved as a standard for third-party authentication in recent years and allows us to securely authenticate our application's users through a standard interface. Twitter and Facebook has been the standouts among dozens of authentication service providers. [...] In this article we'll explore how we can effectively use Opauth to standardize our authentication strategies. I'll be using CodeIgniter here, but even if you're not familiar with CodeIgniter, I suggest you continue reading since it will be similar for other frameworks as well. Once you understand the necessary details for integration, adapting to any framework is super simple.

He talks some about the Opauth library and shows the full authentication flow that your script will follow when using it. Code is included showing how to include and integrate the Opauth library including setup and configuration of the object and the controller/view code to implement the login form.

Oauth is an open standard for authorization that allows secure authorization from web, mobile and desktop applications. This standard allows a third-party application to gain access to a HTTP service, i.e. it enables users to share their resources from one website with another website without having to give out their credentials (usually username and password). [...] Oauth authorization is carried out in 3 steps: obtain a request token, authorize request token and exchange request token for an access token.

They introduce you to some of the basic concepts behind OAuth and how the process works (complete with a handy graphic). They then show how to use OAuth to connect to the Facebook API, both in Javascript then PHP. This is followed with two other examples referencing popular social sites Twitter and Foursquare, hitting their APIs with simple authentication requests.

If you've ever integrated with another API that requires security (such as Twitter), you've probably consumed an OAuth service. In this article, I'll explore what it takes to create your own three-legged OAuth server allowing you, for example, to create your own secure API which you can release publicly.

They include a visual representation of the OAuth authentication flow (it's not the simplest thing) and the database structure/sample code you'll need to get the server up and listening. Also included is a registration form and how to generate a request token and give back an access token. There's also some sample code showing how to validate the request and it's access token to check for a correct (and allowed) request.

Particularly since version 5.0, PHP has been copying many of Java features and practices of Java programmers. This means that if Java programmers practices tend to be bureacratic and less productive, PHP programmers that use those features or adopt those Java practices may also become less productive. This was one of the main topics discussed by Manuel Lemos and Michael Kimsal on the episode 29 of the Lately in PHP podcast.

There's also a bit of discussion about adding generics to PHP and using OAuth in PHP. You can listen to this latest episode either via the in-page player, by downloading the mp3 or by watching the video of the recording. You can also subscribe to their feed to get the latest in the podcast series.

With OS X 10.8, Apple continues to ship PHP 5.3 with Xdebug, PEAR, GD and PDO_MYSQL. This is how to set it up from a clean install of 10.8.

He's broken it up into a few sections including the MySQL setup, Apache configuration , updating the main php.ini and setting up PHPUnit ("and friends") for your testing. He also includes setup instructions for the mcrypt and the PECL OAuth extensions.

In our new tutorial I am going to tell you about inviting friends. I think that this is the most important part for every website, a key to success. Today I will show you how to create simple and effective Gmail contact importer using OAuth authorization and API. Also, I will tell about obtaining Google API access too.

Screenshots show you how to get to the access token information you'll need to connect and the full code is included to help you get authenticated and pull down the contacts list to display in the page's HTML output.

Today I would like to continue talking about video. Last time we talked about Youtube, but today I decided to select Vimeo. [...] Our second example - Vimeo. In our new tutorial I will tell you how you can create Vimeo cross-uploader for your website. To achieve our idea we will use Vimeo Upload API. In the beginning, we should register at Vimeo here.

The full code for the upload script, the HTML for the frontend for it and the CSS to give it a little bit of style. You can see a demo of it here or just download the source.

The very quick registration gives you many users to your web project, we already published login with Facebook, Twitter and Google Plus now time to think about very popular photo sharing portal Instagram. This post explains you how to login with instagram Oauth API and importing user data. Create an instagram account and take a quick look at this demo thanks!

The tutorial walks you through the process of setting up an application in the Instagram service, configuring the scripts with the API key/secret and callback as well as the code for a simple login page. They've also included code to grab the user's information and "popular media" from the web service and pull that information into a local MySQL database.

The process of connecting into API data via OAuth is tricky. Some of the more notable social networks which have adopted this technology include Foursquare, Twitter, and Facebook. But Instagram is a very popular mobile app which has grown tremendously fast. Their recent API v1.0 release has some really neat features where you can pull popular photos, recent users, follower lists, and a whole bunch more.

He points to the Instagr.am PHP API scripts that the service already provides and shows how to set up an application on your Instagr.am account. This application then has OAuth keys you can use to connect to the service (via the PHP API scripts) and pull back basic user information - profile picture, number of photos, followers, etc. There's also a live demo you can test out.

With Twitter moving its API to OAuth the idea of using tokens rather than passwords for authentication went mainstream. Many explanations of OAuth make it seem complicated whereas in reality the "OAuth Dance" is a series of simple steps executed in sequence. This talk covers consuming and providing OAuth services, includes implementation examples, and is recommended for all technical leads, architects, and integration specialists.

You can listen to this latest episode either via the in-page player or by downloading the mp3. You can follow along with the presentation in her slides.