Testing database connections

That makes sense. The following is working for me as far as I can tell. Anyone see any problems?

PHP Code:

    public function check_database()
    {
        
        ini_set('display_errors', 'Off');
        
        //  Load the database config file.
        if(file_exists($file_path = APPPATH.'config/database.php'))
        {
            include($file_path);
        }
        
        $config = $db[$active_group];
        
        //  Check database connection if using mysqli driver
        if( $config['dbdriver'] === 'mysqli' )
        {
            $mysqli = new mysqli( $config['hostname'] , $config['username'] , $config['password'] , $config['database'] );
            if( !$mysqli->connect_error )
            {
                return true;
            }
            else{
                return false;
            }
        }
        else
        {
            return false;
        }
    }