$agent,
'service' => $service,
'partner' => $partner,
'seller_email' => $seller_email,
'_input_charset' => $_input_charset,
'notify_url' => $notify_url,
'return_url' => $return_url,
'subject' => $subject,
'body' => $body,
'out_trade_no' => $out_trade_no,
'price' => $price,
'quantity' => $quantity,
'payment_type' => $payment_type,
'paymethod' => $paymethod,
'defaultbank' => $defaultbank,
'logistics_type' => $logistics_type,
'logistics_fee' => $logistics_fee,
'logistics_payment' => $logistics_payment
);
ksort($parameter);
reset($parameter);
$param='';
$sign='';
foreach($parameter AS $key => $val)
{
if(strlen($val)==0)
{
continue;
}
$param.="$key=".urlencode($val)."&";
$sign.="$key=$val&";
}
$param=substr($param,0,-1);
$sign=md5(substr($sign,0,-1).$paykey);
$gotopayurl='https://mapi.alipay.com/gateway.do?'.$param.'&sign='.$sign.'&sign_type='.$sign_type;
?>
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