正在开发一个Zend应用程序,我需要保留数据库对象的单个实例,并在当前实例以某种方式断开连接时重新连接。这是代码:
class Resource_PdoMysql extends Zend_Application_Resource_ResourceAbstract
{
const KEY = 'PDO_MYSQL';
private static function connect()
{
$connParams = array("host" => host,
"port" => 'port',
"username" => 'username',
"password" => 'password',
"dbname" => 'dbname');
$db = new Zend_Db_Adapter_Pdo_Mysql($connParams);
return $db;
}
public static function getConnection()
{
if (!Zend_Registry::isRegistered(self::KEY))
{
$db = self::connect();
Zend_Registry::set(self::KEY, $db);
}
return Zend_Registry::get(self::KEY);
}
public static function reconnect()
{
$db = self::connect();
Zend_Registry::set(self::KEY, $db);
}
public function init()
{
return self::getConnection();
}
}
Am using $db like this
$db = Resource_PdoMysql::getConnection();
// <Here I need to check if the connection is open before proceeding>
$db->insert('table', $data);
答案 0 :(得分:4)
根据Zend_Db_Adapter
documentation,您可能在调用适配器getConnection()
方法后捕获异常。这是示例中的复制粘贴摘录:
try {
$db = Zend_Db::factory('Pdo_Mysql', $parameters);
$db->getConnection();
} catch (Zend_Db_Adapter_Exception $e) {
// perhaps a failed login credential, or perhaps the RDBMS is not running
} catch (Zend_Exception $e) {
// perhaps factory() failed to load the specified Adapter class
}
希望有所帮助,
答案 1 :(得分:1)
我想知道你为什么需要这个。
如果您使用标准ZF引导,Zend_Application_Bootstrap_Bootstrap
将为您管理数据库连接。
如果没有有效连接,Zend_Db::factory
会自动为您创建一个。此外,如果您的数据库设置保持不变并且已经存在活动的Zend_Db
对象,则Zend_Db_Adapter
将不会创建另一个连接
你需要在application.ini中有一个db连接部分,bootstrap将为你处理一切。
resources.db.adapter = "pdo_mysqli"
resources.db.params.host = "localhost"
resources.db.params.dbname = "db"
resources.db.params.username = "user"
resources.db.params.password = "pass"