Somebody requested we have a spoiler tag, so that we can hide infomation for challenges and such. Your wish has been granted!
[spoiler] Hello world! [/spoiler] now makes Hello world! , and you just click it to reveal whats underneath the blur. It also works with images.
Enjoy!
Wow, that shows how much effort you guys invest in this site! Thank you for your extremely fast response!
No worries man 
we work hard to keep the community thriving 
Is there a appropiate way to hide code? Using spoiler tags, it doesn’t work very well:
Example:
<?php print("Hi there, I should be hidden") ?>
No there doesn’t appear to be any way of doing that. Yet.
Thanks for the reply! I’ll stick with that in the meantime
You have been spoiled