select('name,age')->from('users')->where('age>12')->query();print_r()exit * 等价于 * $user_array = Db::instance('db1')->query('SELECT `name`,`age` FROM `users` WHERE `age`>12'); * @var array */ class Db { public static $db = array( 'host' => DB_HOST, 'user' => DB_USER, 'password' =>DB_PWD, 'dbname' => DB_NAME, 'port' => DB_PORT, 'charset' => DB_CHARSET, ); }