<?php

  class dbConnect {

    private $username = "root";
    private $password = "";

    public function __construct($username, $password) {
      $this->username = $username;
      $this->password = $password;
    }

    public function connect($username, $password) {
      $conn = new PDO('mysql:host=localhost;dbname=sequencemtg', $username, $password);
    }

  }

  $username = "root";
  $password = "";
  $conn = new PDO('mysql:host=localhost;dbname=sequencemtg', $username, $password);
  $test = new dbConnect($username, $password);
  $test->connect($username, $password);

?>