# 3.1 环境变量 系统环境变量，相应的环境配置如下： ```bash $>vi ~/.bashrc ... $>export MSF_ENV=... ``` ## docker ``` $>export MSF_ENV=docker ``` ## dev ``` $>export MSF_ENV=dev ``` ## qa ``` $>export MSF_ENV=qa ``` ## online ``` $>export MSF_ENV=product_en ``` ## 环境变量的应用 ```php #!/home/worker/php/bin/php <?php /** * swoole server * * @author camera360_server@camera360.com * @copyright Chengdu pinguo Technology Co.,Ltd. */ define('ROOT_PATH', __DIR__); define('APP_DIR', ROOT_PATH . '/app'); define('APPLICATION_ENV', $_ENV['MSF_ENV'] ?? 'docker'); define('SYSTEM_NAME', 'demo'); define("WWW_DIR", realpath(dirname(__FILE__) . '/..')); define('RUNTIME_DIR', WWW_DIR . '/runtime/' . SYSTEM_NAME); define('DUMP_TRUNCATED', true); !is_dir(RUNTIME_DIR) && @mkdir(RUNTIME_DIR, 0755, true); require_once __DIR__ . '/vendor/autoload.php'; $worker = new \App\AppServer(); PG\MSF\Server::run(); ``` [server.php](https://github.com/pinguo/php-msf-demo/blob/master/server.php) 通过`define('APPLICATION_ENV', $_ENV['MSF_ENV'] ?? 'docker');`，定义常量，从而对应加载相应目录的配置，如：`config/docker/`。