How do I display my image on the center of my page I tried

```
<center><?php
        }
        else
        {
            $form = true;
            $message = 'The username or password you entered are not good.';
        }
    }
    else
    {
        $form = true;
    }
    if($form)
    {
?></center>

```

But it didn't work..