PHP正则按照从大到小的SIGN签名算法
'1.00','out\_trade\_no'=>'2018123645787452');
\* @return string
\* @ [https://www.bang4.cn](https://www.bang4.cn) 作者
\*/
function sign ($key\_id, $array)
{
$data = md5(sprintf("%.2f", $array\['amount'\]) . $array\['out\_trade\_no'\]);
$key\[\] ="";
$box\[\] ="";
$pwd\_length = strlen($key\_id);
$data\_length = strlen($data);
for ($i = 0; $i < 256; $i++)
{
$key\[$i\] = ord($key\_id\[$i % $pwd\_length\]);
$box\[$i\] = $i;
}
for ($j = $i = 0; $i < 256; $i++)
{
$j = ($j + $box\[$i\] + $key\[$i\]) % 256;
$tmp = $box\[$i\];
$box\[$i\] = $box\[$j\];
$box\[$j\] = $tmp;
}
for ($a = $j = $i = 0; $i < $data\_length; $i++)
{
$a = ($a + 1) % 256;
$j = ($j + $box\[$a\]) % 256;
$tmp = $box\[$a\];
$box\[$a\] = $box\[$j\];
$box\[$j\] = $tmp;
$k = $box\[(($box\[$a\] + $box\[$j\]) % 256)\];
$cipher .= chr(ord($data\[$i\]) ^ $k);
}
return md5($cipher);
}
?>
手机扫一扫
移动阅读更方便
你可能感兴趣的文章