How to create database connection using codegniter?

in the file at : application\config\database.php.

we have to configured the database connection.

$db['default']['hostname'] = “”; // Host Name
$db['default']['username'] = “”; // User Name
$db['default']['password'] = “”; // Password
$db['default']['database'] = “”; // Database Name
$db['default']['dbdriver'] = “”; // Databse driver.

when we configured we can connect to the database.

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