In Site Administration/Development/Debugging, the Display debug messages setting is set to Off/unchecked. So: Debug messages, errors or warnings should be written to the logs, as I want them to be for troubleshooting purposes, but no errors/warnings should be displayed to the screen, regardless of the Debug messages level setting. Is that correct?
And is that also still correct, even if the SMTP debugging (Debug email sending) is set to On/checked (with Display debug messages still set to Off/unchecked)? I've had some strange instances in the last 24 hours of seeing error messages displayed onscreen, even with Display debug messages set to Off. It was only happening if the Debug messages setting was other than NONE or if SMTP/Debug email sending was set to On. I now have all debug messages including SMTP set to off, but I'm wondering if it's possible for me to use these tools without creating an inadvertent display of error messages to the screen.
Edited to add:
Moodle 2.7 (Joule version, Moodlerooms hosted)