Accented characters not showing when using imagettftext with otf but showing with ttf

Question

I\'m using imagettftext to generate images from OpenType files. Everything works until I try to use an accented character (e.g. å) or a character such as √. In their place I get

Answer 1

Not true! (answer 1) imagettftext works with unicode. Some font files do not have accented characters but rely on the graphic library to use the unicode combining diacritical marks (0300–036F) to draw the character correctly. This seems to fail in php gd.