Using GD in PHP, how can I make a transparent PNG watermark on PNG and GIF files ? (JPG files work fine)

Question

I have an image (let\'s call it original image) on which I want to watermark another image (let\'s call it logo).
The logo is a transparent PN

Answer 1

imagecopy does not support using two images with alpha channels. take a look at imagecopymerge.

http://php.net/manual/en/function.imagecopymerge.php

There are plenty examples in the user comments sections, and a finished implementation for what you want:

http://www.php.net/manual/en/function.imagecopymerge.php#92787