What could be causing the issue with displaying umlauts correctly in PHP buttons?

The issue with displaying umlauts correctly in PHP buttons could be due to encoding problems. To solve this, you can set the character encoding to UTF-8 in your PHP code. This ensures that special characters like umlauts are displayed correctly.

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
</head>
<body>
    <form method="post">
        <button type="submit" name="submit">Ümläüt</button>
    </form>
</body>
</html>