I'm trying to display MySQL utf8_general_ci encoded texts in fpdf by using PHP's utf8_decode. Everything worked as expected, but when our customer entered his texts, every ü showed up as u? etc.
The problem is that I can't tell the difference between his ü and mine. Both show up fine in phpMyAdmin or our CMS. Once I replace his ü with one typed by me it works.
What's the hidden difference here?