Yii CDbConnection failed to open the DB connection.

Yii 預設使用 SQLite Database，PHP 需要安裝函式庫

PHP Fatal error:  Uncaught exception 'PDOException' with message 'could not find driver' in /var/www/demos/blog/protected/data/dbgen.php:7 

# apt-get install sqlite php5-sqlites
# /etc/init.d/apache2 restart