001+ libpng warning: Application was compiled with png.h from libpng-1.6.20
002+ libpng warning: Application is running with png.c from libpng-1.2.54
001- The images are equal.
002- int(842163455)
003+
004+ Warning: imagecreatefrompng(): gd-png: fatal libpng error: Incompatible libpng version in application and library in /home/ubuntu/php-5.6.34/ext/gd/tests/func.inc on line 86
005+ Segmentation fault (core dumped)