by looking to the text you quoted I guess you're using the old chat version,
please check out the latest version of the code posted here Chat box 6
this was a bug/limitation in the old version but fixed in the new one by cleaning up users exceeding the specified inactivity period
I'm not sure what you're referring to but if you're seeing empty lines, feel free to delete them, again I didn't experience such thing in the new version
I really recommend you to have a look at the new code since it has a lot more features, easier to integrate/configure and easier to customize (check the documentations link)
I hope it helps
Thanks for your answer and sure your new chat is great BUT
- I'm looking for a very simple chat like this old version but with this blocking issue of empty lines filled in the .txt files, an idea to fix it in this old version ?
- And I'm not able to migrate my website to PHP version 5 and the new version that you propose is broken deployed on my server with PHP 4.4.3 version in prerequiste. An idea ?
Thanks in advance !