If an entry is created depends on the log level. For the level CONST_LOG_LEVEL_FILE=DEBUG all debug and error call-ups are logged, for the level CONST_LOG_LEVEL_FILE=NOTICE only error call-ups are logged. This has the advantage that the call-ups of the method debug can be left in the code even after the implementation is complete. Per default these call-ups are not written into the log file. If errors occur in the future in a production environment, only the log level has to be adjusted to receive a more detailed output.
