What best practices should PHP developers follow to handle and display special characters, such as Umlaute and ß, correctly in web applications, particularly when sending emails through platforms like Thunderbird?

Special characters like Umlaute and ß can cause encoding issues when displayed in web applications or sent through email. To handle these characters correctly, PHP developers should ensure that their web pages are properly encoded in UTF-8 and use htmlentities or htmlspecialchars functions to escape special characters before displaying them. When sending emails through platforms like Thunderbird, developers should set the email headers to specify UTF-8 encoding. 

// Set UTF-8 encoding for web pages
header('Content-Type: text/html; charset=utf-8');

// Escape special characters before displaying
$text = "Möglichkeiten für Entwickler mit PHP & HTML";
echo htmlentities($text, ENT_QUOTES, 'UTF-8');

// Set UTF-8 encoding for email headers
$subject = "Änderungen an Ihrem Konto";
$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";
$headers .= "From: example@example.com" . "\r\n";

// Send email
mail($to, $subject, $message, $headers);

Keywords

UTF-8 htmlspecialchars mb_convert_encoding MIME Thunderbird

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