Class LoggerFilterLevelRange

This is a very simple filter based on level matching, which can be used to reject messages with priorities outside a certain range.

The filter admits three options LevelMin, LevelMax and AcceptOnMatch.

If the level of the LoggerLoggingEvent is not between Min and Max (inclusive), then LoggerFilter::DENY is returned.

If the Logging event level is within the specified range, then if AcceptOnMatch is true, LoggerFilter::ACCEPT is returned, and if AcceptOnMatch is false, LoggerFilter::NEUTRAL is returned.

If LevelMin is not defined, then there is no minimum acceptable level (i.e. a level is never rejected for being too "low"/unimportant). If LevelMax is not defined, then there is no maximum acceptable level (ie a level is never rejected for being too "high"/important).

Refer to the LoggerAppender::setThreshold() method available to all appenders extending LoggerAppender for a more convenient way to filter out events by level.

An example for this filter:

{@example ../../examples/php/filter_levelrange.php 19}

The corresponding XML file:

{@example ../../examples/resources/filter_levelrange.xml 18}