• Log-in to your blog and open the file in which you would like to integrate facebook share button (e.g. single.php)
• Copy and paste the following code in the file and save the file.

<a name="fb_share" type="button_count" share_url="<?php the_permalink(); ?>">Share</a>
<script src="http://static.ak.fbcdn.net/connect.php/js/FB.Loader" type="text/javascript"></script>
<script src="http://static.ak.fbcdn.net/connect.php/js/FB.Share" type="text/javascript"></script>

type=”button_count” in the above can be modified to display different styles of the facebook share button.

Code	Style	Size (pixel)
box_count		57×57
button_count		96×18
button		56×18
icon_link		51×15
icon		18×15

‘FB.loader is null or not an object.’

The error is generated because FB.loader has not been loaded, while it is called-in by another subsequent function.

Solution

• Search for the following code

<script src="http://static.ak.fbcdn.net/connect.php/js/FB.Share" type="text/javascript"></script>

• Add the following just before the previous code

<script src="http://static.ak.fbcdn.net/connect.php/js/FB.Loader" type="text/javascript"></script>

• The final code should look like the following:

<script src="http://static.ak.fbcdn.net/connect.php/js/FB.Loader" type="text/javascript"></script>
<script src="http://static.ak.fbcdn.net/connect.php/js/FB.Share" type="text/javascript"></script>