What are the difference between php_gd and php_gd2 extention?

Answer 1

Hello, may be it is the difference between gd and gd2 in php
gd is an old c library, gd2 is the updated one. php uses gd2.
Some version of GD generates only PNG, but recent version can ganerate GIF and PNG.
Soon GD 1 will be no longer supported in next version of PHP.