convert unicode to html entities hex

Question

How to convert a Unicode string to HTML entities? (HEX not decimal)

For example, convert Français to Français.

Answer 1

Your string looks like UCS-4 encoding you can try

$first = preg_replace_callback('/[\x{80}-\x{10FFFF}]/u', function ($m) {
    $char = current($m);
    $utf = iconv('UTF-8', 'UCS-4', $char);
    return sprintf("&#x%s;", ltrim(strtoupper(bin2hex($utf)), "0"));
}, $string);

Output

string 'Français' (length=13)