Merge two transparent png photos via php, getting nonsense?

Question

PHP

Hello.
Guys need to overlay two transparent pictures on top of each other through php.
There is a solution, but not completely.
I use imagecopymerge
But photos are not superimposed.
Or get one photo. Or it turns out with a black background, tell me what to do?
I 'm preparing two png photos imagecreatefrompng
How can I fix this?

Answer 1

Maybe better through sprite?
https://habrahabr.ru/post/159027/

Answer 2

probably due to the fact that you initially create a photo without a transparent background