title: Adding copyright url in image
body: <p>Adding copyright url in image</p>
  <p>I am trying to find a way to insert my website URL in the copyright headers of a png or a jpg image when a user uploads the image to my site.
  I am using PHP on the server.</p>
  <p>Is this possible to do?</p>
  <p>If so, please point me in the right direction.</p>
  <p>I do not need a watermark.
  Just a text URL in the headers somewhere, which I can later read if same image is reuploaded to my site.</p>
  <p>It does not has to be in the headers specifically, anywhere else in the image data will also do.</p>
  <p>I am sorry that I do not have any code to show for this. I don't even know where to start looking to begin coding for this...</p>
  <p>Thanks</p>