Facebook is the fastest growing social networking application that currently has more than 350 million active users. One of it’s key features is Facebook Platform, that enable us to build applications on Facebook. Currently there are a lot of Facebook applications built by developers around the world such as game, which is the most popular application on Facebook.
This tutorial will guide you through the creation of a Facebook application using Facebook PHP API that will display Hello World text, called Hola Mundo. Before we begin to create Facebook application, there are a few things that you have to know:
If you have meet the requirements above, you are ready to get started building Facebook application through this tutorial.
A. Setting Up Your Application
B. Configure Application on Your Host
After configuring your application on Facebook, it’s time to do a little bit coding and some server administration tasks.
<?php include_once 'facebook.php'; $apikey = 'typeyourapikeyhere'; $secretkey = 'typeyoursecretkeyhere'; $fbObj = new Facebook($apikey, $secretkey); $myuid = $fbObj->require_login(); $fbml = "<h2>Hello world, my name is <fb:name uid=\"$myuid\" useyou=\"false\" />," . "welcome to my first facebook application!</h2>"; echo $fbml; ?>
Simple right ? Facebook has made it simple using FBML, all you have to do is apply the predifined tags on your code. You can read the complete explanation about FBML on Facebook Developers Wiki page here .
line 2: include the facebook main library file
line 4&5: define your api key and secret key
line 7: create an instance of Facebook client class
line 8: get your facebook user id (uid), the require_login method is used to force user to logged into Facebook before using the application. If they are not logged in, Facebook will redirect them to Facebook login page first and then brings them to your application page after they logged in.
line 9: your page content’s that display your name using FBML Fb:name tag.
Now your application is complete and ready to be accessed by anyone in the world. Type your Canvas Page URL on browser and you’ll get Allow Access page which is default for Facebook application for the first time access, click Allow button to access your application.
You can view live example application above here