jy-sdk/ThinkPHP/Library/Org/Kudian/Sign.class.php

<?php
namespace Org\Kudian;

class Sign
{
    const SIGN_KEY = 'sign';

    public static function generate($params, $secretKey)
    {
        Log::write('SIGN_PARAMS: ' . json_encode($params));
        unset($params[self::SIGN_KEY]);
        ksort($params);
        $signStr = '';
        foreach ($params as $key => $value) {
            $signStr .= $key . "=" . $value . "&";
        }
        $signStr = rtrim($signStr, '&') . "&secret_key=" . $secretKey;
        Log::write('SIGN_STR: ' . $signStr);
        $sign = md5($signStr);
        $sign = strtoupper($sign);
        return $sign;
    }

    public static function verify($params, $secretKey)
    {
        $sign = $params[self::SIGN_KEY] ?: null;
        return self::generate($params, $secretKey) == $sign;
    }
}