class Connection {

    public $host = 'localhost';
    public $dbname = 'usodecontas';
    public $username = 'root';
    public $password = 'abc123';

    public function conectar() {
        try {

            $conn = new PDO("mysql:host={$this->host};dbname={$this->dbname}", $this->username, $this->password);

            $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            return $conn;

        } catch (PDOException $e) {
            echo $e->getMessage();
        }

    }

}