dbconfig

<?php
$db = isset($_POST['db']) ? $_POST['db'] : '';
class Database
{

    private $host = "localhost";
    private $db_name = "designer6";
    private $username = "root";
    private $password = "123456";
    public $conn;

    public function dbConnection()

    {
    $db = isset($_POST['db']) ? $_POST['db'] : '';
        $this->conn = null;
        try
        {

            $this->conn = new PDO("mysql:host=" . $this->host . ";dbname=" . $this->db_name, $this->username, $this->password);
            $this->conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        }
        catch(PDOException $exception)
        {
            echo "Connection error: " . $exception->getMessage();
        }

        return $this->conn;
    }
}
?>