Php supports GD library

Install the plug-in NextGEN Gallery on wordpress to support photo albums. An error occurs after an image is uploaded.
You do not have the GD Library installed. This class requires the GD library to function properly. visit http://us2.php.net/manual/en/ref.image.php for more information

According to the online search, we learned that php needs to support the gb library for Image Generation,
So re-compile php, add-with-gd in configure, and an error is returned.
Configure: error:Libpng. (A | so)Not found

If you use-with-png-dir =/usr/lib, an error still occurs.
After yum install pnglib is used, re-compile php, or an error occurs.
Finally, try to use yum install pnglib-devel and re-compile php.

Php used pnglib-devel instead of pnglib.