How to decode Unicode escape sequences like "\u00ed" to proper UTF-8 encoded characters?

Question

Is there a function in PHP that can decode Unicode escape sequences like "\u00ed" to "í" and all other similar occurrences?

I found similar question here but is doesn't seem to work.

Answer 1

Try this:

function replace_unicode_escape_sequence($match) {
    return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UTF-16BE');
}
$str = preg_replace_callback('/\\\\u([0-9a-f]{4})/i', 'replace_unicode_escape_sequence', $str);