$db = Zend_Db::factory('Pdo_Mysql', array(
                               'host'     => '127.0.0.1',
                               'username' => 'root',
                               'password' => '123456',
                               'dbname'   => 'mysql'
     ));

Directly connect to MYSQL and return a database connection object
Read the configuration in the configuration file and connect

$config = new Zend_Config_Ini('config.ini', 'main');    //讀取分析Zend的配置文件，main表示配置文件的上級(jí)
$params['profiler'] = $config->db->profiler;            //賦值數(shù)據(jù)庫(kù)連接信息
$db = Zend_Db::factory('PDO_MYSQL', $params);           //連接數(shù)據(jù)庫(kù)

For more analysis on how to use Zend Framework to connect to the database, please pay attention to the PHP Chinese website!