title: PHP Convert umlauts from e.g. "ue" to "ü"
body: <p>Is there a way to convert umlauts from the representations <code>ae, Ae, oe, Oe, ue, Ue</code> and <code>ss</code>, back to the original umlauts? Important is that the spelling is observed like "teuer"! For example, the term "<code>teuer</code>" must <strong>not be changed</strong> in "<code>teür</code>". Thanks!</p>