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POAdding Facebook Connect to a CodeIgniter website
 

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    <p>I'm having problems trying to connect my website to Facebook. What I would like it to do is allow users to augment their accounts by connecting them to Facebook (I do not need people to be able to login with Facebook, I am using OpenID instead). My website runs in the CodeIgniter framework.</p> <p>What I will do is remove everything that I've tried and walk you through my steps up until it stops working.</p> <p><strong>Step 1: Set up the JavaScript SDK and XFBML</strong></p> <p>First I add a reference to the FBML spec to my <code>&lt;html&gt;</code> tag:</p> <pre><code>&lt;html xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://www.facebook.com/2008/fbml" xml:lang="en" lang="en"&gt; </code></pre> <p>Then, after my <code>&lt;body&gt;</code> tag, I add:</p> <pre><code>&lt;script src="http://static.new.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php" type="text/javascript"&gt;&lt;/script&gt; </code></pre> <p>Now here comes the first problem I had <a href="https://stackoverflow.com/questions/3104455/why-is-my-facebook-connect-button-taking-me-to-the-wrong-url">but have now solved</a>. The problem was that the docs for the JavaScript SDK say that the <code>FB.init()</code> method <a href="http://developers.facebook.com/docs/reference/javascript/FB.init" rel="nofollow noreferrer">requires the appId</a> as a parameter, but this turned out to be incorrect. I needed to pass my apiKey instead. So this is the code that I ended up with, that goes before my <code>&lt;/body&gt;</code> tag:</p> <pre><code>&lt;div id="fb-root"&gt;&lt;/div&gt; &lt;script src="http://connect.facebook.net/en_US/all.js"&gt;&lt;/script&gt; &lt;script&gt; FB.init({ apiKey : '&lt;?php echo $this-&gt;config-&gt;item('facebook_api_key'); ?&gt;', status : true, cookie : true, xfbml : true }); &lt;/script&gt; </code></pre> <p>Now I can add XFBML entities to my pages, such as <code>&lt;fb:login-button&gt;&lt;/fb:login-button&gt;</code> which works just as expected. I click it and it pops up a box asking if I want to allow my website to access my Facebook profile. I say yes, and then if I check my Application Settings in Facebook, I can see that my website has been added.</p> <p>So this step works fine.</p> <p><strong>Step 2: Set up the PHP library</strong></p> <p>Okay, so now I need to add the PHP library. So a quick google search for 'codeigniter facebook library' reveals <a href="http://www.haughin.com/code/facebook/" rel="nofollow noreferrer">Elliot Haughin's library</a>. I download the files, put them all in the right places then get to work on loading the library.</p> <p>Now the current problem occurs. I add the following code (taken from the example given with the library) to my controller constructor so that it happens on every page:</p> <pre><code>$this-&gt;load-&gt;library('facebook_connect'); $this-&gt;data['fb_user'] = $this-&gt;facebook_connect-&gt;user; $this-&gt;data['fb_userid'] = $this-&gt;facebook_connect-&gt;user_id; </code></pre> <p>But if I do <code>print_r($this-&gt;data['fb_user']);</code> I get nothing. Ever. Whether I'm logged into facebook, logged out, logged in and added my site to my profile, etc. etc. etc. The user and user_id are never set. I don't get any errors though.</p> <p>As far as I'm aware, the values are supposed to be set so that I know whether the person browsing my site is logged into their facebook account. If they are, I can see if they've allowed my application. If they've allowed it, I can let them disconnect from my site, if not, I can let them connect. But I can't do anything if these variables aren't populated.</p> <p>I've tried poking around inside the source of the library, but I really can't get my head around it. And I'm hoping that the actual solution for this won't involve hacking the library apart. I'd expect a CodeIgniter specific library to work.</p> <p>Any ideas?</p> <p>Thanks a lot. :)</p>
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    1. COFacebook has a official php-sdk that works well within codeigniter... http://jondavidjohn.com/b/P
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