XF 2.2 index.php issue

[Mark87]

I am getting this error today, changed nothing and added nothing, it just keeps coming up in a file check?

Check completed on 5,077 files. The files listed below have contents different from those originally downloaded.

If you have edited these files yourself, you may ignore this message, otherwise you should investigate further as this may be evidence of corrupted or altered files.

 

[Paul B]

As the message states: "If you have edited these files yourself, you may ignore this message, otherwise you should investigate further as this may be evidence of corrupted or altered files." .

Copy the file to your computer, upload a replacement file, then investigate how it was changed.