How can the use of mb_encode_mimeheader function in PHPMailer help resolve Umlaut character display issues in the sender's name?

When sending emails with Umlaut characters in the sender's name using PHPMailer, the characters may not display correctly due to encoding issues. To resolve this problem, the mb_encode_mimeheader function can be used to properly encode the sender's name before setting it in the email header. This function ensures that special characters are encoded in a way that is compatible with email standards, allowing Umlaut characters to display correctly in the recipient's email client.

// Set sender's name with Umlaut characters using mb_encode_mimeheader
$sender_name = "Jürgen Müller";
$encoded_sender_name = mb_encode_mimeheader($sender_name, 'UTF-8');

// Set sender's email address
$sender_email = "sender@example.com";

// Set sender in PHPMailer
$mail->setFrom($sender_email, $encoded_sender_name);