How do i get a transparent background after rotaing a png image with php?

Question

So I have png image and I rotate it but i get a black background.. or if i do the color code ofr white i get white.. I tried doing this..

$trans = imagecol         


        

Answer 1

Make sure you set imagesavealpha to TRUE in order to preserve transparency. http://www.php.net/manual/en/function.imagesavealpha.php

imagesavealpha($image, TRUE);