Codeigniter error when trying to connect to database using mysqli

Question

I am getting Following error in my CodeIgniter application which is live on server.

Here is the output of the error:

A PHP Error was encounte

Answer 1

Try to set config/database.php 'username' => 'xxx' to 'username' => 'root' without any password.

$db['default'] = array( 
'dsn' => '',
'hostname' => 'localhost',
'username' => 'root',
'password' => '',