Monolog(https://www.oschina.net/action/GoToLink?urlhttps%3A%2F%2Fgithub.com%2FSeldaek%2Fmonolog)是目前最流行的php日志库，许多流行的php框架都用Monolog作为默认的日志库，例如symfony、laravel。默认情况下，symfony、lara