gracias por sus respuestas, hago lo que me indicaste y me da el siguiente error:
Código PHP:
Fatal error: Uncaught exception 'Zend_Db_Adapter_Exception' with message 'The PDO extension is required for this adapter but the extension is not loaded' in C:ZF111libraryZendDbAdapterPdoAbstract.php:342 Stack trace: #0 C:\ZF111\library\Zend\Db\Adapter\Abstract.php(247): Zend_Db_Adapter_Pdo_Abstract->setFetchMode(2) #1 C:\ZF111\library\Zend\Db.php(270): Zend_Db_Adapter_Abstract->__construct(Array) #2 C:\ZF111\library\Zend\Application\Resource\Db.php(142): Zend_Db::factory('PDO_MYSQL', Array) #3 C:\ZF111\library\Zend\Application\Resource\Db.php(154): Zend_Application_Resource_Db->getDbAdapter() #4 C:\ZF111\library\Zend\Application\Bootstrap\BootstrapAbstract.php(680): Zend_Application_Resource_Db->init() #5 C:\ZF111\library\Zend\Application\Bootstrap\BootstrapAbstract.php(623): Zend_Application_Bootstrap_BootstrapAbstract->_executeResource('db') #6 C:\ZF111\library\Zend\Application\Bootstrap\BootstrapAbstract.php(583): Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap(NULL) #7 C:\ZF111\library\Zend\Applicatio in C:\ZF111\library\Zend\Db\Adapter\Pdo\Abstract.php on line 342