Feedback Validating function ReflectionExtension

PHPSP/php-src#5 #phpspMaisTestFest
http://news.php.net/php.qa/67353
https://joind.in/event/view/2258
http://www.meetup.com/php-sp/events/190933702/
What if `gd` is not enabled? And why do you output "function does not exist" when gd *is* enabled?