Special characters with imagettftext and otf fonts
<p>I want to write a text onto a graphic by using imagettftext with an OTF-Font. My problem is that there are special characters like "ä", "ö" or "ü" which are shown as a square.</p>

<p>Is there any solution for my problem? It seems to be a problem of OTF-Fonts, because TTF-Fonts seem to work.</p>

<p>I also tried imagefttext - same problem :(</p>

<p>Thanks!</p>
