燃鹅解密PHP版，可做接口
PHP版

<?php
/*
 * @Author: ZeroArt
 * @Date: 2021-02-25 
 * @Link: http://www.8gws.com
 * @LastEditors: ZeroArt
 */
class rane
{
    // utf8编码
    function decodeUtf8($bytes)
    {
        $encoded = "";
        for ($i = 0; $i < count($bytes); $i++) {
            $encoded .= '%' . dechex($bytes[$i]);
        }
        return urldecode($encoded);
    }

    // 数组转字符串
    function dec($t)
    {
        if (is_string($t)) {
            return $t;
        } else {
            $n = [];
            for ($i = 0; $i < count($t); $i++) {
                $n[] = $t[$i];
            }
        }
        return $this->decodeUtf8($n);
    }

    // hex字符串转数组
    public function n($t)
    {
        $e = 0;
        $n = strlen($t);
        if ($n % 2 != 0) {
            return null;
        } else {
            $n /= 2;
            $o = [];
            for ($i = 0; $i < $n; $i++) {
                $r = substr($t, $e, 2);
                $a = hexdec($r);
                $o[] = $a;
                $e += 2;
            }
            $os = [];
            foreach ($o as $key => $value) {
                $os[] = $value;
            }
            return $os;
        }
    }

    // 加解密核心算法
    function m($t, $e)
    {
        $a = [];
        $n = "";
        $o = count($e);
        $i = ($t ^ $o) % 255;
        $r = (($o & $i) + ($t ^ $i)) % 255;
        $a = [];
        $s = 0;
        for ($s = 0; $s < $o; $s++) {
            $i -= ($r * $o ^ $t) % 255;
            $t -= $r;
            $n = 255 & (($n = $e[$s]) ^ ($r = $i % 255));
            $a[] = $n;
        }
        return $a;
    }
}

$rane = new rane();

// 常规模式
if (isset($_GET['t']) && isset($_GET['v'])) {
    echo ($rane->dec($rane->m($_GET['t'], $rane->n($_GET['v']))));
    exit();
}

// JOSN格式
if (isset($_GET['json']) || isset($_POST['json'])) {
    $param = json_decode($_REQUEST['json'], true);
    echo ($rane->dec($rane->m($param['t'], $rane->n($param['v']))));
    exit();
}

// 案例
if (isset($_GET['dome'])) {
    echo ($rane->dec($rane->m('59131814', $rane->n('ad88eff390bd7706d24a93f04727c0d61f886f3f4922680c5cb7f8716073379a625845875d6708477d3014f31e575098b983ce709bd1f7f3f7fa63f6e12eb216ade7a43e314048cc80d73c18d6a8d72cb1f231593b4aa9ef56a170fbf9db23d07048589053d56fa4bafdbbe8b52720d938f6b4f85a2dd0092805fc2c6aa4c8fd3b92a89c7786368eb0e979d96c03831412d23d008a491b68295d893c77251902dba8ee84fe390efbee01d65815254bd9bbe1bd7e12b1fc0542bfc893d0ac83c3b7abafbc6328aa37f89a378fce83e01d49d19ef4ed20893993870501fdef066e092a27fc45a7ce8c0d54fa0244f6b7a2388be2a7fba0aa80cbe313194886d0ace13ab730f0288e987fa31088d4f559d74a14a8f057254e070b8b'))));
    exit;
}

// 提示
$msg = [
    [
        "JSON请求" => "?json={'t'=>'59131814','v'=>'xxxxxx'}"
    ],
    [
        "常规请求" => "?t=59131814&v=xxxxxx"
    ]
];
echo "<pre>";
var_dump($msg);
echo "</pre>";

// utf8编码 - www.8gws.com
function decodeUtf8(bytes) {
    var encoded = "";
    for (var i = 0; i < bytes.length; i++) {
        encoded += '%' + bytes[i].toString(16);
    }
    return decodeURIComponent(encoded);
}
// 数组转字符串
function dec(t) {
    if ("string" == typeof t) return t; for (var n = [], i = 0; i < t.length; i++) {
        n.push(t[i]);
    } return decodeUtf8(n);
}
// hex字符串转数组
function n(t) {
    var e = 0,
        n = t.length; if (n % 2 != 0) return null; n /= 2; for (var o = [], i = 0; i < n; i++) {
            var r = t.substr(e, 2),
                a = parseInt(r, 16); o.push(a), e += 2;
        } return o;
}
// 加解密核心算法
function m(t, e) {
    for (var n, o = e.length,
        i = (t ^ o) % 255,
        r = ((o & i) + (t ^ i)) % 255,
        a = [], s = 0; s < o; s++) {
        i -= (r * o ^ t) % 255, t -= r, n = 255 & ((n = e[s]) ^ (r = i % 255)), a.push(n);
    } return a;
}
// 字符串转字节
function stringToByte(t) {
    var e,
        n,
        o = new Array();
    e = t.length;
    for (var i = 0; i < e; i++) {
        (n = t.charCodeAt(i)) >= 65536 && n <= 1114111 ? (o.push(n >> 18 & 7 | 240), o.push(n >> 12 & 63 | 128), o.push(n >> 6 & 63 | 128), o.push(63 & n | 128)) : n >= 2048 && n <= 65535 ? (o.push(n >> 12 & 15 | 224), o.push(n >> 6 & 63 | 128), o.push(63 & n | 128)) : n >= 128 && n <= 2047 ? (o.push(n >> 6 & 31 | 192), o.push(63 & n | 128)) : o.push(255 & n);
    } return o;
}
// 数组转hex字符串
function parseByte2HexStr(t) {
    for (var e = "", n = 0; n < t.length; n++) {
        var o = t[n].toString(16);
        1 == o.length && (o = "0" + o), e += o;
    } return e;
}
// 解密数据，a和b分别为t和v
function decode(a, b) {
    return dec(m(a, n(b)))
}
// 加密数据，e和n分别为t和v
function encode(e, n) {
    return parseByte2HexStr(m(e, stringToByte(n)))
}

// t值,v值
decode("59131814",'xxxxxx');