What are the potential challenges of managing multilingual content in a PHP/MySQL website, especially when dealing with different character encodings like ISO-8859 and UTF-8?

Managing multilingual content in a PHP/MySQL website can be challenging when dealing with different character encodings like ISO-8859 and UTF-8. One potential issue is the mismatch between the encoding used in the database and the encoding expected by the browser, leading to garbled or incorrect display of text. To solve this, ensure that your database tables are set to use UTF-8 encoding, and also set the character set and collation in your PHP script to UTF-8.

// Set the character set and collation for MySQL connection
mysqli_set_charset($connection, "utf8");

// Set the character set for PHP output
header('Content-Type: text/html; charset=utf-8');