It looks like it is left-over config files from php5-pam (which is no longer available.)
sudo apt remove php5-pam --purge
will remove those config files and got rid of the periodic emailed error for me anyway.
It looks like it is left-over config files from php5-pam (which is no longer available.)
sudo apt remove php5-pam --purge
will remove those config files and got rid of the periodic emailed error for me anyway.