Problemi di codifica /uxxxx

[epiclavori]

function unicode_decode($str){
return preg_replace("/\\\u([0-9A-F]{4})/ie", "iconv('utf-16', 'utf-8', hex2str(\"$1\"))", $str);
}

function hex2str($hex) {
$r = '';
for ($i = 0; $i < strlen($hex) - 1; $i += 2)
$r .= chr(hexdec($hex[$i] . $hex[$i + 1]));
return $r;
}