PHP - Pin It Button Dynamic Add

dynamic-pin-it-button.php

 <?php
        //[TM][5/18/2012]
        //Pin it button on Image Gallery
 		//Used along with jQuery Library and Pinterest social buttion JavaScript
 		//Not Complete. You must add parameters for pinning a specific image and appending to the a href address

$domain = $_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
$homepage = "www.[domain].com/";

$containsThis = strpos($domain, "image-galleries/");

if ($containsThis <> false )
  {

 echo "<a href='http://pinterest.com/pin/create/button/' class='pin-it-button' count-layout='horizontal'><img border='0' src='//assets.pinterest.com/images/PinExt.png' title='Pin It' /></a>";
	}
 else 
{

 echo " ";
 
 }
?>