Zend框架中的应用程序buid在演示服务器中时工作正常。我将网站移至客户端服务器，然后面临以下问题。请帮我解决这个问题。
谢谢。
================ BEGIN错误
exception 'Zend_Db_Adapter_Mysqli_Exception' with message 'The Mysqli extension is required for this adapter but the extension is not loaded' in
Stack Trase
/home/mtapp/public_html/demo/library/Zend/Db/Adapter/Mysqli.php:291
0 /home/mtapp/public_html/demo/library/Zend/Db/Adapter/Abstract.php(448): Zend_Db_Adapter_Mysqli->_connect()
1 /home/mtapp/public_html/demo/library/Entity/Page.php(119): Zend_Db_Adapter_Abstract->query('SELECT p.slug, ...')
2 /home/mtapp/public_html/demo/modules/site/controllers/ErrorController.php(23): Entity_Page::getMenuItems()
3 /home/mtapp/public_html/demo/library/Zend/Controller/Action.php(513): Site_ErrorController->errAction()
4 /home/mtapp/public_html/demo/library/Zend/Controller/Dispatcher/Standard.php(289): Zend_Controller_Action->dispatch('errAction')
5 /home/mtapp/public_html/demo/library/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
6 /home/mtapp/public_html/demo/Bootstrap.php(21): Zend_Controller_Front->dispatch()
7 /home/mtapp/public_html/demo/public/index.php(7): Bootstrap::run()
8 {main}
================结束错误
如果使用旧版本的socialengine，则切换到PHP v5.6。