Facebook: How-to force users to LIKE page

With Facebook’s move to deprecate FBML for tabs the documentation around how to make a “please Like! before…” has become much more choppy and inconsistent. Anyway, I recently found myself in a position where I needed to make this happen so here goes.

With in-line FBML deprecated, the only way to accomplish this without using a third party branded solution is to create a Facebook iframe app. Here are the steps you need to take to get something up using PHP and the Facebook PHP SDK.

1. Create a new Facebook Application at https://developers.facebook.com/apps

2. Configure your new Facebook App the enable “Website” and “Page Tab”. You’ll need to enter a valid URL for the following fields:

  • Site URL
  • Page Tab URL
  • Secure Page Tab URL

You’ll also want to use a HTTPs URL since Facebook sessions default to HTTPs by default and your iframe will be marked insecure if its over vanilla HTTP. For this walk through, lets assume were using https://www.setfive.com/fb/index.php? as the URL.

3. Now, you’ll want to add your new App to a Facebook Page. The easiest way to do this is to use this URL https://www.facebook.com/dialog/pagetab?app_id=YOUR_APP_ID&next=YOUR_URL replacing YOUR_APP_ID and YOUR_URL with your App ID and then a URL that is derived from your endpoint (or even just your endpoint). When you load that URL, you’ll be prompted to add your app to a page – select the page you want and submit the form.

4. The final piece is throwing together the actual PHP script. You’ll need the Facebook PHP SDK available on GitHub – https://github.com/facebook/php-sdk. Clone that and then this is the PHP script you’ll need:

And thats it! Now you’ll be able to gate content from non-fans while growing the fanbase of your Facebook Page.

Drop any questions in the comments.

Posted In: Demo, PHP

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