Omnipay: Alipay (Global)

{
    "require": {
        "lokielse/omnipay-global-alipay": "dev-master"
    }
}

$ curl -s http://getcomposer.org/installer | php
$ php composer.phar update

/**
 * @var Omnipay\GlobalAlipay\WebGateway $gateway
 */
//gateways: GlobalAlipay_Web, GlobalAlipay_Wap, GlobalAlipay_App
$gateway = Omnipay::create('GlobalAlipay_Web');
$gateway->setPartner('8888666622221111');
$gateway->setKey('your**key**here'); //for sign_type=MD5
$gateway->setPrivateKey($privateKeyPathOrData); //for sign_type=RSA
$gateway->setReturnUrl('http://www.example.com/return');
$gateway->setNotifyUrl('http://www.example.com/notify');
$gateway->setEnvironment('sandbox'); //for Sandbox Test (Web/Wap)

$params = [
    'out_trade_no' => date('YmdHis') . mt_rand(1000,9999), //your site trade no, unique
    'subject'      => 'test', //order title
    'total_fee'    => '0.01', //order total fee
    'currency'     => 'USD', //default is 'USD'
];

/**
 * @var Omnipay\GlobalAlipay\Message\WebPurchaseResponse $response
 */
$response = $gateway->purchase($params)->send();

//$response->redirect();
var_dump($response->getRedirectUrl());
var_dump($response->getRedirectData());
var_dump($response->getOrderString()); //for GlobalAlipay_App

/**
 * @var Omnipay\GlobalAlipay\WebGateway $gateway
 */
$gateway = Omnipay::create('GlobalAlipay_Web');
$gateway->setPartner('8888666622221111');
$gateway->setKey('your**key**here'); //for sign_type=MD5
$gateway->setPrivateKey($privateKeyPathOrData); //for sign_type=RSA
$gateway->setEnvironment('sandbox'); //for Sandbox Test (Web/Wap)

$params = [
    'request_params' => array_merge($_GET, $_POST), //Don't use $_REQUEST for may contain $_COOKIE
];

$response = $gateway->completePurchase($params)->send();

/**
 * @var Omnipay\GlobalAlipay\Message\CompletePurchaseResponse $response
 */
if ($response->isPaid()) {

   // Paid success, your statements go here.

   //For notify, response 'success' only please.
   //die('success');
} else {

   //For notify, response 'fail' only please.
   //die('fail');
}