merging image layers using php
Hey im trying to make a signature generator and I have multiple images going over eachother. And when the user clicks "create signature" I want it to merge all of the selected layers into 1 png image. I know its possible but for some reason it never works for me.
I was using something like this, but all it did was create a bunch of jiberish text on my web page without actually creating the image.
Can someone help me out to get this to work please?
$image = imagecreatefromstring(file_get_contents(URL OF IMAGE);
$frame = imagecreatefromstring(file_get_contents(URL OF IMAGE));
imagecopymerge($image, $frame, 0, 0, 0, 0, 50, 50, 100);
Also, is it possible to merge text layers to the image too? If its possible, could you include that too please?