What are some common issues with using iconv in PHP, especially when converting to ASCII//TRANSLIT?

When using iconv in PHP to convert strings to ASCII//TRANSLIT, a common issue is that some characters may not be transliterated properly or may be dropped altogether. To solve this issue, you can use the `mb_convert_encoding` function with the `TRANSLIT` flag instead, as it provides more accurate transliteration.

$string = "làm việc";
$converted_string = mb_convert_encoding($string, 'ASCII', 'UTF-8');
echo $converted_string;