Oh I see ... KiXScripts Editor ...
Well, that makes my points not less true (dismissing $exedir 
)
Still the others are valid and will cause users to complain to you.
Look, I am only a moderator here, and as this forum is open (not moderated) I try to help you
with giving tips to make your udf bullet proof and 'blackboxed' ...
It's your decision.
More hints here (esp. points 8 and 9)
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