<?php
namespace common\pay\kuaifu2;

class PayUtils
{


    /** 
     * @param array $data
     * @return string 
     */
    public static function makeSign($data, $secretKey)
    {
        $str = '';
        ksort($data);
        foreach ($data as $key => $value) {
            if ($key == 'sign' || $key =="attach") {
                continue;
            }
            $value = strval($value);
            if ($value === '') {
                continue;
            }
            $str .= "{$key}={$value}&";
        }
        file_put_contents('kuaifu2_str_befor.txt',$str);
        $str = rtrim($str, '&') . "&key={$secretKey}";
        file_put_contents('kuaifu2_str_after.txt',strtoupper(md5($str)));
        return strtoupper(md5($str));
    }


    /**
     * @param array $data
     * @param $key
     * @return bool|int
     */
    public static function verify($data, $key)
    {
        // 签名
        if (!isset($data['sign']) || trim($data['sign']) === '') {
            return false;
        }
        $sign = $data['sign'];
        $sing_new = PayUtils::makeSign($data,$key);
         
        // 比较两次的签名是否一致
        if($sign == $sing_new){
            return true;
        }else{
            return false;
        }

		
    }


}