octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true">Omnipay: Alipay

/**
 * @var AopAppGateway $gateway
 */
$gateway = Omnipay::create('Alipay_AopPage');
$gateway->setSignType('RSA2'); // RSA/RSA2/MD5. Use certificate mode must set RSA2
$gateway->setAppId('the_app_id');
$gateway->setPrivateKey('the_app_private_key');
$gateway->setAlipayPublicKey('the_alipay_public_key'); // Need not set this when used certificate mode
$gateway->setReturnUrl('https://www.example.com/return');
$gateway->setNotifyUrl('https://www.example.com/notify');

// Must set cert path if you used certificate mode
//$gateway->setAlipayRootCert('the_alipay_root_cert'); // alipayRootCert.crt
//$gateway->setAlipayPublicCert('the_alipay_public_cert'); // alipayCertPublicKey_RSA2.crt
//$gateway->setAppCert('the_app_public_cert'); // appCertPublicKey.crt
//$gateway->setCheckAlipayPublicCert(true);

/**
 * @var AopTradePagePayResponse $response
 */
$response = $gateway->purchase()->setBizContent([
    'subject'      => 'test',
    'out_trade_no' => date('YmdHis') . mt_rand(1000, 9999),
    'total_amount' => '0.01',
    'product_code' => 'FAST_INSTANT_TRADE_PAY',
])->send();

$url = $response->getRedirectUrl();