What is PDOException : could not find driver?
If you see "PDOException : could not find driver" in your error logs, that means the SQLite PDO driver is not installed on your server.
The SQLite PDO driver is listed as a prerequisite in the help article " Verify your prerequisites".
Please consult your system documentation for installing the PDO SQLite drivers
Installation instructions are dependent on the distribution and versions you are using. Examples are a guide only
Ubuntu / Debian based
sudo apt-get install php5-sqlite
Fedora, Red Hat, etc.
yum install php5-sqlite
pacman -S php-sqlite