You are here because as a WordPress plugin developer you are experiencing the following error:
The plugin generated 8 characters of unexpected output
during activation. If you notice “headers already sent” messages,
problems with syndication feeds or other issues, try deactivating or
removing this plugin.
I solved the issue by doing the following…
Somewhere in my php file that produces the admin page I closed the php tags, then had a few empty lines and then I opened my php tags again. This caused an output of 8 unexpected characters. To be a bit more clear it looked like this:
<?php // code here... ?> <!-- these white spaces caused the problem --> <? // code here... ?>
So basically all you need to do is to remove all your empty white spaces in your code, deactivate your plugin (if you haven’t done so already) and activate it again.
If this error can be caused by some other issues please let me know about it in the comments.
I hope that helped anyone.