FATAL: fatal error
CRITICAL: critical error
ERROR: error
WARNING: warning
NOTICE: notice
FATAL: fatal error
CRITICAL: critical error
ERROR: error
WARNING: warning
NOTICE: notice
INFO: info
DEBUG: debug
DEBUG1: debug level 1
DEBUG2: debug level 2
DEBUG3: debug level 3
DEBUG4: debug level 4
WARNING: Unknown log level 'bla'. Using INFO level as default.
INFO: the level is INFO