SetNumber(3); Data::GetInstance()->Number = 4; echo Data::GetInstance()->Number . "
"; Data::GetInstance()->Text = "Hello World"; echo Data::GetInstance()->Text . "
"; Data::GetInstance()->SetProperty("NumberA", 2); Data::GetInstance()->SetProperty("NumberB", 3); echo Data::GetInstance()->GetProperty("NumberA") + Data::GetInstance()->GetProperty("NumberB") . "
"; ?>