# 连接数据库 一、全局配置定义 ```php return array( 'DB_TYPE' => 'mysql', 'DB_HOST' => '127.0.0.1', 'DB_NAME' => 'thinkcmf', 'DB_USER' => 'root', 'DB_PWD' => 'root', 'DB_PORT' => '3306', 'DB_PREFIX' => 'cmf_', //密钥 "AUTHCODE" => '2oF6v4m67BdQnfwMSf', //cookies "COOKIE_PREFIX" => '03a9uH_', ); ``` 如果我们已经在配置文件中配置了额外的数据库连接信息，例如： ```php return array( //数据库1 'DB_TYPE' => 'mysql', 'DB_HOST' => '127.0.0.1', 'DB_NAME' => 'thinkcmf', 'DB_USER' => 'root', 'DB_PWD' => 'root', 'DB_PORT' => '3306', 'DB_PREFIX' => 'cmf_', //密钥 "AUTHCODE" => '2oF6v4m67BdQnfwMSf', //cookies "COOKIE_PREFIX" => '03a9uH_', //数据库2 'DB_CONFIG2' => array( 'db_type' => 'mysql', 'db_user' => 'root', 'db_pwd' => 'root', 'db_host' => '127.0.0.1', 'db_port' => '3306', 'db_name' => 'repast' ), ); ``` 二、实例化定义 ```php $User = M('User','cmf_','DB_CONFIG2'); ``` 作者：小夏