Facebook like PHP script

We’ve seen the facebook like button everywhere right? But the crappy thing is that you have to copy-and-paste the facebook iframe code that has to be then edited. Lets fix this right now.
I created a PHP function called facebook_like() which can be called anywhere where you want to show the facebook like button. For more info on the facebook like button go here :http://developers.facebook.com/docs/reference/plugins/like

COPY AND PASTE:

<?php

function facebook_like(){

function getAddress() //this function will show the URL you are on DONT EDIT

{

/*** check for https ***/

$protocol = $_SERVER['HTTPS'] == 'on' ? 'https' : 'http';

/*** return the full address ***/

return $protocol.'://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];

}

$url =  getAddress(); //your full URL for page

return '<iframe src="http://www.facebook.com/plugins/like.php?href='.$url.'&amp;layout=standard&amp;show_faces=true&amp;width=450&amp;action=like&amp;colorscheme=light&amp;height=80" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:450px; height:80px;" allowTransparency="true"></iframe>';

}

?>

<h1>Hey do you like this page PHPacademy?</h1>

<?=facebook_like();?>