- mb_convert_encoding: documentation ( source)
- var_dump: documentation ( source)
- preg_replace_callback: documentation ( source)
- pack: documentation ( source)
<?php
function replace_unicode_escape_sequence($match) {
var_dump($match);
return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE');
}
$str = "Bal\u00edky";
$str = preg_replace_callback('/\\\\u([0-9a-f]{4})/i', 'replace_unicode_escape_sequence', $str);
echo $str;