[Flow] confused about sessions

[Sasky, Patrick]

Thanks for your reply!

For a short testing with ViewHelpers I have created a 
SessionViewHelper.php at \Classes\Company\Demo01\ like this:
http://pastebin.com/FEGbsJZH

In my template I include this with following command:
{namespace ev=Company\Demo01\ViewHelpers}

But this results in 500 internal server error and there isn't any useful 
information in my apache-logs - no errors recorded.

This is my first ViewHelper and I didn't get it after reading all 
documentations I found. Can you help, please?

Thanks!