function alipay_link($params)
{
#支付宝接口配置
$type = $params['T'];
$alipay_config['input_charset'] = 'utf-8';
$alipay_config['sign_type'] = "MD5";
$alipay_config['transport'] = $params['ssl'] ? "https" : "http";
$alipay_config['partner'] = $params['partnerID'];
$alipay_config['key'] = $params['security_code'];
$alipay_config['seller_email'] = $params['seller_email'];
$debug = $params["debug"];
#系统变量
$invoiceid = $params['invoiceid'];
$description = $params["description"];
$amount = $params['amount'];
# Format: ##.##
$currency = $params['currency'];
# Currency Code
$companyname = $params['companyname'];
$systemurl = $params['systemurl'];
$currency = $params['currency'];
$alipay_config['return_url'] = $systemurl . "/modules/gateways/callback/alipay_return.php";
$alipay_config['notify_url'] = $systemurl . "/modules/gateways/callback/alipay_callback.php";
switch ($type) {
case "1":
$service_name = "create_direct_pay_by_user";
break;
case "2":
$service_name = "create_partner_trade_by_buyer";
break;
case "3":
$service_name = "trade_create_by_buyer";
break;
default:
}
//基本参数
$parameter = array("service" => $service_name, "partner" => trim($alipay_config['partner']), "_input_charset" => trim(strtolower($alipay_config['input_charset'])), "return_url" => trim($alipay_config['return_url']), "sign_type" => trim($alipay_config['sign_type']), "notify_url" => trim($alipay_config['notify_url']));
//业务参数
$parameter["subject"] = "{$companyname} 订单[ {$invoiceid} ]";
$parameter["body"] = $description;
$parameter["out_trade_no"] = $invoiceid;
$parameter["price"] = $amount;
$parameter["quantity"] = "1";
$parameter["payment_type"] = "1";
$parameter["seller_email"] = trim($alipay_config['seller_email']);
if ($type != "1") {
$parameter["logistics_fee"] = "0";
$parameter["logistics_type"] = "EXPRESS";
$parameter["logistics_payment"] = "SELLER_PAY";
}
$img = $systemurl . "/modules/gateways/callback/alipay.png";
$alipaySubmit = new AlipaySubmit($alipay_config);
$html_text = $alipaySubmit->buildRequestForm($parameter, "get", "确认");
if ($debug) {
$msg = "订单: {$invoiceid} 生成支付表单 {$html_text}";
logResult($msg);
}
$code = $html_text . "</form><a href='#' onclick=\"document.forms['alipaysubmit'].submit();\"><img src='{$img}' alt='点击使用支付宝支付'> </a>";
return $code;
}