<b>How to Fix error: Call to undefined function: imagecreatefrompng() for windows</b>
edit php.ini as follows
The Extensions dir entry
; Directory in which the loadable extensions (modules) reside.
extension_dir=c:/php/extensions/
Where c:/php/extensions/ is the directory in which you have installed php's extensions, also remember to put forward slashes instead of back slashes.
The Dynamic Extensions Section:
;;;;;;;;;;;;;;;;;;;;;;
; Dynamic Extensions ;
;;;;;;;;;;;;;;;;;;;;;;
Uncomment the following line
extension=php_gd.dll