How to configure CodeIgniter 2.1.2 with SQLite3

database.php

/* SQLite3 config for PDO */

$db['default'] = array (
 	'dsn' => 'sqlite:'. FCPATH.'virtTour_original.sqlite', //Change this to the path of your db file
 	'hostname' => '',
 	'username' => '',
 	'password' => '',
 	'dbdriver' => 'pdo',
 	'dbprefix' => '',
	'pconnect' => FALSE,
	'db_debug' => TRUE,
	'cache_on' => FALSE,
	'cachedir' => '',
	'char_set' => 'utf8',
	'dbcollat' => 'utf8_general_ci',
	'swap_pre' => '',
	'autoinit' => TRUE,
	'stricton' => FALSE,
	'failover' => array()
);