Logger\Logger::add_global_handler PHP 메소드

        public function add_global_handler(Handler $handler)
        {
            $this->_handlers[] = $handler;
            if (count($this->_loggers) != 0) {
                foreach ($this->_loggers as $_logger) {
                    $this->_loggers[$_logger]->add_handler($handler);
                }
            }
        }