This function used to write log.
This is minimum parameter of function.
App::Helper('Log')->Write('Test log');
Advanced example:
App::Helper('Log')
->setFkey(15) // Set user id
->setLogType('System') // Log type
->Write('Test log');
By default all log set in text format. If we set log type 'Query then log save in database. See bellow example:
App::Helper('Log')
->setFkey(32)
->setLogType('Query')
->Write('Test log');