backdrop_error_levels in core/includes/
Maps PHP error constants to watchdog severity levels.
DBLogTestCase::getSeverityConstant in core/modules/dblog/tests/dblog.test
Gets the watchdog severity constant corresponding to the CSS class.
dblog_overview in core/modules/dblog/
Page callback: Displays a listing of database log messages.
hook_watchdog in core/modules/system/system.api.php
Log an event message.
system_logging_settings in core/modules/system/
Form builder; Configure error reporting settings.
watchdog_severity_levels in core/includes/
Returns a list of severity levels, as defined in RFC 3164.