How can including a meta tag with a different charset in the HTML head affect the handling of multibyte characters in PHP scripts?

Including a meta tag with a different charset in the HTML head can affect the handling of multibyte characters in PHP scripts by causing encoding issues. To solve this problem, you should ensure that the charset specified in the meta tag matches the encoding used in the PHP scripts.

<?php
header('Content-Type: text/html; charset=utf-8');
?>