function buildRequestMysign($para_sort)
{
$prestr = Alipay::createLinkstring($para_sort);
$mysign = "";
switch (strtoupper(trim($this->alipay_config['sign_type']))) {
case "MD5":
$mysign = Alipay::md5Sign($prestr, $this->alipay_config['key']);
break;
case "RSA":
$mysign = Alipay::rsaSign($prestr, $this->alipay_config['private_key_path']);
break;
case "0001":
$mysign = Alipay::rsaSign($prestr, $this->alipay_config['private_key_path']);
break;
default:
$mysign = "";
}
return $mysign;
}
