我的系统在 subdomain.domain.com 上的服务器上工作，但是当我把它放在 domain.com 上时，会出现这个错误？
Subdomain.domain.com 和 domain.com 在同一台服务器上。
该怎么办？
致命错误：/home/take/public_html/google.bg/library/Zend/Db/Adapter/Pdo/Abstract.php :342
'Zend_Db_Adapter_Exception'中的消息未捕获异常'The PDO extension is required for this adapter but the extension is not loaded'堆栈跟踪：
#0 /home/take/public_html/google.bg/library/Zend/Db/Adapter/Abstract.php(247): Zend_Db_Adapter_Pdo_Abstract->setFetchMode(2) #1 /home/take/public_html/google.bg/library/Zend/Db.php(270): Zend_Db_Adapter_Abstract->__construct(Array) #2 /home/take/public_html/google.bg/library/Zend/Application/Resource/Db.php(142): Zend_Db::factory('PDO_MYSQL', Array) #3 /home/take/public_html/google.bg/library/Zend/Application/Resource/Db.php(154): Zend_Application_Resource_Db->getDbAdapter() #4 /home/take/public_html/google.bg/library/Zend/Application/Bootstrap/BootstrapAbstract.php(683): Zend_Application_Resource_Db->init() #5 /home/take/public_html/google.bg/library/Zend/Application/Bootstrap/BootstrapAbstract.php(629): Zend in /home/take/public_html/google.bg/library/Zend/Db/Adapter/Pdo/Abstract.php on line 342