Watermarks as a first-line content protection asset is required for almost any celling or commercial website. Most simple solution for this is the use of a watermark adding function for all image uploads. Watermarks, however, are often required for websited already having tens or hundreds uploads. In such cases you can use simple yet effective PHP/Apache solution.
First off you need to create a watermark, say PNG-24 watermark.png and place it in the website root folder.
Second off, create...