I'm the virtualmin / Webmin 1.810 I was using the 1790 version.
Even before or after the PHP error logs are not being recorded in the "error_logs" folder. The folder is empty on all sites.
In PHP settings by virtualmin in: Services -> PHP5 configs -> error logging: has this option: "Log file for errors." The default value was: "None", put "syslog" put "$ HOME / logs / error_log". And no configuration made the error log are saved in a file.
Thanks a lot.