'Pdoexception' permission problem

Question

I’m getting a permission error to create the Huge Login:

Fatal error: Uncaught Exception 'Pdoexception' with message 'SQLSTATE[28000] [1045] Access denied for user 'root'@'localhost (using password: YES) ' in /var/www/html/myproject/application/core/Databasefactory.php on line 42

( ! ) Pdoexception: SQLSTATE[28000] [1045] Access denied for user 'root'@'localhost' (using password: YES) in /var/www/html/myproject/application/core/Databasefactory.php on line 42

Following some responses from Soen as this, I’ve already changed the permissions of the application and folder folders tmp for -R 777, I changed the root password, etc, but nothing did not solve.

The archive DatabaseFactory.php:

<?php
class DatabaseFactory
{
    private static $factory;
    private $database;

    public static function getFactory()
    {
        if (!self::$factory) {
            self::$factory = new DatabaseFactory();
        }
        return self::$factory;
    }
    public function getConnection() {
        if (!$this->database) {
            $options = array(PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_OBJ, PDO::ATTR_ERRMODE => PDO::ERRMODE_WARNING);
            $this->database = new PDO(
                Config::get('DB_TYPE') . ':host=' . Config::get('DB_HOST') . ';dbname=' .
                Config::get('DB_NAME') . ';port=' . Config::get('DB_PORT') . ';charset=' . Config::get('DB_CHARSET'),
                Config::get('DB_USER'), Config::get('DB_PASS'), $options
            );
        }
        return $this->database; // ->>> linha 42
    }
}

The BD configuration data:

'DB_TYPE' => 'mysql',
'DB_HOST' => '127.0.0.1',
'DB_NAME' => 'huge',
'DB_USER' => 'root',
'DB_PASS' => 'password',
'DB_PORT' => '3306',
'DB_CHARSET' => 'utf8',

The privileges of the comic book huge:

System:

Server: Localhost via UNIX socket
Type of server: Mysql
Server version: 5.5.44-0ubuntu0.14.04.1 - (Ubuntu)
Version of the protocol: 10
User: root@localhost
Server charset: UTF-8 Unicode (utf8)

(on the last line I deleted the name of my maq. for security...)

Any idea?