In what situations would it be recommended to avoid using iconv in PHP and opt for alternative functions like mb_convert_encoding?

When dealing with character encoding conversions in PHP, it is recommended to avoid using the iconv extension in certain situations where it may not handle all character sets correctly. Instead, it is better to use alternative functions like mb_convert_encoding, which provides better support for a wider range of character encodings.

// Example of using mb_convert_encoding to convert a string from one encoding to another
$string = "Hello, 你好";
$convertedString = mb_convert_encoding($string, 'UTF-8', 'GBK');

echo $convertedString;