Is it recommended to use convert_cyr_string to handle character encoding in PHP?

When handling character encoding in PHP, it is generally not recommended to use the `convert_cyr_string` function as it is specific to Cyrillic character sets and may not handle all encoding issues effectively. Instead, it is better to use more modern functions like `mb_convert_encoding` or `iconv` which provide better support for a wider range of character encodings.

// Example of using mb_convert_encoding to handle character encoding
$string = "Привет, мир!";
$converted_string = mb_convert_encoding($string, 'UTF-8', 'ISO-8859-5');
echo $converted_string;