Are you insane?
In production, you should have error_reporting set to something like: E_ALL & ~E_DEPRECATED
And then:
display_errors = Off display_startup_errors = Off track_errors = Off html_errors = Off ignore_repeated_errors = Off ignore_repeated_source = Off log_errors = On error_log = /path/to/log/file (or syslog)
He specifically mentioned you should have errors logged instead, not displayed to the client. You're quoting only the part that leads to your insult.
Sorry bro, if you have ever put code on production with error reporting on...you are doing it wrong.