How do I fix this error installing zend database?

getting this problem while installing database 

when i install zend database it gives error (Connection failed! Please check the details and try again.PDOException: could not find driver in [...]/install/index.php:10 Stack trace: #0 [...]/install/index.php(10): PDO->__construct('mysql:host=loca...', 'xxx', 'password') #1 {main})