php-monolog/UPGRADE.md

2.0.0

• The timezone is now set per Logger instance and not statically, either via ->setTimezone or passed in the constructor. Calls to Logger::setTimezone should be converted.

• Removed non-PSR-3 methods to add records, all the add* (e.g. addWarning) methods as well as emerg, crit, err and warn.

• HandlerInterface has been split off and two new interfaces now exist for more granular controls: ProcessableHandlerInterface and FormattableHandlerInterface. Handlers not extending AbstractHandler should make sure to implement the relevant interfaces.

• HandlerInterface now requires the close method to be implemented. This only impacts you if you implement the interface yourself, but you can extend the new Monolog\Handler\Handler base class.