<?php
namespace common\pay\payplat;

class PayUtils
{


     /**
     * @param array $data
     * @param string $secretKey
     * @return string
     */
    public static function makeSign($data)
    {
        $str = '';
        ksort($data);
        foreach ($data as $key => $value) {
            if ($key == 'sign') {
                continue;
            }
            $value = strval($value);
            if ($value === '') {               //参数为空不参与签名
                continue;
            }
            $str .= "{$key}={$value}&";
        }
        $str = rtrim($str, '&');
        return strtoupper(md5($str));
    }


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


}