加密串怎样修改 急 在线等

2016-07-07 15:22 来源：www.chinab4c.com 作者：ecshop专家



function encrypt($str, $key = 123)
{
$coded = '';
$keylength = strlen($key);
for ($i = 0, $count = strlen($str); $i < $count; $i += $keylength)
{
$coded .= substr($str, $i, $keylength) ^ $key;
}
return str_replace('=', '', base64_encode($coded));
}
/**
* 瑙ｅ瘑鍑芥暟
* @paramstring$str 鍔犲瘑鍚庣殑瀛楃?涓?
* @paramstring$key 瀵嗛挜
* @returnstring鍔犲瘑鍓嶇殑瀛楃?涓?
*/
function decrypt($str, $key = 123)
{
$coded = '';
$keylength = strlen($key);
$str = base64_decode($str);
for ($i = 0, $count = strlen($str); $i < $count; $i += $keylength)
{
$coded .= substr($str, $i, $keylength) ^ $key;
}
return $coded;
}
?>

回答：
怎么样修改 ？急

这是啥问题?????