<?php

/*

=============================================================================================

Script Name: watermark.php4

Verion: 1.0

Author: Ryan Doutt

Date: April 2007

Acknowledge: Brock Ferguson - See original article at http://www.sitepoint.com/article/watermark-images-php

which this script is based.

This is a PHP scripted, watermarking system for graphics files to be used with .htaccess on 

an Apache web server.  It should be called as follows from within your root .htaccess file:

RewriteEngine on

RewriteCond %{REQUEST_URI} uploads(.*) [NC]

RewriteRule ^(.*)$ http://www.yourdomain.com/path/to/watermark.php4?src=$1 [NC]

To see this script in action please point your favorite browser in the general direction of

one of the following images:

http://www.1800getryan.com/uploads/certaldo/P6180228.JPG

http://www.1800getryan.com/uploads/ireland/P8230023.JPG

http://www.1800getryan.com/uploads/broumov/P5240187.JPG

This script is available for use as freeware subject to the retention of the preceding

information and acknowledgements in any copy or modification that is made to this code.

=============================================================================================

*/

header('content-type: image/jpeg');  

$watermark = imagecreatefrompng('watermark.png');  
$watermark_width = imagesx($watermark);  
$watermark_height = imagesy($watermark);  
$image = imagecreatefromjpeg($_GET['src']);  
$size = getimagesize($_GET['src']);  
$dest_x = $size[0] - $watermark_width;  
$dest_y = $size[1] - $watermark_height;  
$white = imageColorAllocate ($watermark, 255, 255, 255);
imagecolortransparent($watermark,$white);
imagecopymerge($image, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height, 100);  
imagejpeg($image);  
imagedestroy($image);  
imagedestroy($watermark);

?>