How to Install the Facebook Like Box on Your Drupal Website also enable php code as input text format

Get facebook likebox code from facebook.com
suppose



Then create a block and add avove code also select php code as input tex format




Do you know how to enable php code for input text format?
see below:

Go to Administration > Modules.
Scroll down to the PHP filter module and check the Enabled box. Press the Save Configuration button.
When you will add ant content/block select php code as input method. That's all