<?php

namespace common\pay\yunfu;

class PayUtils
{
    /**
     * @param array $data
     * @param string $secretKey
     * @return string
     */
    public static function makeSign($data, $secretKey)
    {
        if(isset($data['sign'])) {
            unset($data['sign']);
        }
        ksort($data);
        $sign_str = '';
        foreach($data as $k => $v) {
            $sign_str .= $k . '='.$v.'&';
        }    
        $sign_str = strtoupper(md5( $sign_str."key=".$secretKey));
        return $sign_str;
    }

    /**
     * @param array $data  参数
     * @param string $secretKey
     * @return bool
     */
    public static function checkSign($data, $secretKey)
    {
        $sign = isset($data['sign']) ? $data['sign'] : null;
        if ($sign == null) {
            return false;
        }
        return self::makeSign($data, $secretKey) === $sign;
    }
}