php5 unicode convert raw post data to urlencoded

php5_post_raw_to_urlencoded.php

<?php
function replace_unicode_escape_sequence($match) {
    return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE');
}
 
function unicode_decode($str) {
    return preg_replace_callback('/\\\\u([0-9a-f]{4})/i', 'replace_unicode_escape_sequence', $str);
}

$data="fname=jemygraw_999.png\u0026etag=FkbO_BZF_49z0j63-2i1C25QGdT3\u0026key=FkbO_BZF_49z0j63-2i1C25QGdT3\u0026exParam1=w\u0026exParam2=h\u0026exParam3=h";
$data=unicode_decode($data);
echo $data;

fname=jemygraw_999.png&etag=FkbO_BZF_49z0j63-2i1C25QGdT3&key=FkbO_BZF_49z0j63-2i1C25QGdT3&exParam1=w&exParam2=h&exParam3=h