laravel框架记录监听sql语句，并且打印到日志文件中

添加到服务容器AppServiceProvider.php 
boot 方法中
if (env('APP_ENV') != 'production') {
            \DB::listen(
                function ($sql) {
                    foreach ($sql->bindings as $i => $binding) {
                        if ($binding instanceof \DateTime) {
                            $sql->bindings[$i] = $binding->format('\'Y-m-d H:i:s\'');
                        } else {
                            if (is_string($binding)) {
                                $sql->bindings[$i] = "'$binding'";
                            }
                        }
                    }

                    // Insert bindings into query
                    $query = str_replace(array('%', '?'), array('%%', '%s'), $sql->sql);

                    $query = vsprintf($query, $sql->bindings);

                    // Save the query to file
                    $logFile = fopen(
                        storage_path('logs' . DIRECTORY_SEPARATOR . date('Y-m-d') . '_query.log'),
                        'a+'
                    );
                    fwrite($logFile, date('Y-m-d H:i:s') . ': ' . $query . PHP_EOL);
                    fclose($logFile);
                }
            );
        }

可以在执行查询的时候，记录下所有连锁查询的sql语句，便于排查性能和查找问题