One click (1-click) subscription upgrade

Detailed 1-click subscription upgrade flow

Identify returning customers

You particularly need either the Avangate customer reference or the external customer reference you control.

Use customer information

Use subscription information

Validate upgrade options and costs

Create the manual upgrade link

To build custom upgrade links you need the following two elements:

1. The main upgrade path: https://secure.avangate.com/order/upgrade.php? or https://YourStore.com/order/upgrade.php? if you use a custom domain with Avangate. 

2. The unique subscription identifier from the Avangate system: LICENSE=1234567.

The simplest upgrade link you can build is https://secure.avangate.com/order/upgrade.php?LICENSE=1234567

Attach the payment token to the manual Upgrade link

Example

<?php
$host   = "https://api.avangate.com";
$client = new SoapClient($host . "/soap/3.0/?wsdl", array(
    'location' => $host . "/soap/3.0/",
    "stream_context" => stream_context_create(array(
        'ssl' => array(
            'verify_peer' => false,
            'verify_peer_name' => false
        )
    ))
));

function hmac($key, $data)
{
    $b = 64; // byte length for md5
    if (strlen($key) > $b) {
        $key = pack("H*", md5($key));
    }
    
    $key    = str_pad($key, $b, chr(0x00));
    $ipad   = str_pad('', $b, chr(0x36));
    $opad   = str_pad('', $b, chr(0x5c));
    $k_ipad = $key ^ $ipad;
    $k_opad = $key ^ $opad;
    return md5($k_opad . pack("H*", md5($k_ipad . $data)));
}
 

$merchantCode = "YOUR_MERCHANT_CODE";// your account's merchant code available in the 'System settings' area of the cPanel: https://secure.avangate.com/cpanel/account_settings.php
$key = "YOUR_SECRET_KEY";// your account's secret key available in the 'System settings' area of the cPanel: https://secure.avangate.com/cpanel/account_settings.php

$now          = date('Y-m-d H:i:s'); //date_default_timezone_set('UTC')
$string = strlen($merchantCode) . $merchantCode . strlen($now) . $now;
$hash   = hmac($key, $string);
try {
    $sessionID = $client->login($merchantCode, $now, $hash);
}
catch (SoapFault $e) {
    echo "Authentication: " . $e->getMessage();
    exit;
}
 
$SubscriptionSearch = new stdClass();
$SubscriptionSearch->CustomerEmail  = null;
$SubscriptionSearch->DeliveredCode = '___TEST___CODE____123';
$SubscriptionSearch->AvangateCustomerReference = '449686020';
$SubscriptionSearch->ExternalCustomerReference = null;
$SubscriptionSearch->Aggregate = false;
$SubscriptionSearch->SubscriptionEnabled = null; //true false null
$SubscriptionSearch->RecurringEnabled = null; // true - autorenewal, false - manual renewal, null = both(default) 
$SubscriptionSearch->ProductCodes = null; //array('Product_Code1', 'Product_Code2');
$SubscriptionSearch->CountryCodes = null;//array ('au')
$SubscriptionSearch->PurchasedAfter = null;
$SubscriptionSearch->PurchasedBefore = null;
$SubscriptionSearch->ExpireAfter = null;
$SubscriptionSearch->ExpireBefore = null;
$SubscriptionSearch->RenewedAfter = null;
$SubscriptionSearch->RenewedBefore = null;
$SubscriptionSearch->NotificationAfter = null;
$SubscriptionSearch->NotificationBefore = null;
$SubscriptionSearch->LifetimeSubscription = null;
$SubscriptionSearch->Type = 'regular'; //'trial', 'regular', 'regularfromtrial'
$SubscriptionSearch->TestSubscription = null; // true, false, null = both(default) 
$SubscriptionSearch->Page = 1;
$SubscriptionSearch->Limit = 10;
try {
    $allsubscriptions = $client->searchSubscriptions($sessionID, $SubscriptionSearch);
}
catch (SoapFault $e) {
    echo "allsubscriptions: " . $e->getMessage();
    exit;
}
$subscriptionReference = $allsubscriptions[0]->SubscriptionReference;
//retrieve all the upgrade options for a subscription
try {
    $optionsforUpgrade = $client->getProductUpgradeOptions($sessionID, $subscriptionReference);
}
catch (SoapFault $e) {
    echo "optionsforUpgrade: " . $e->getMessage();
    exit;
}
//retrieve information about the costs a customer incurs when upgrading a specific subscription
$productCode = $optionsforUpgrade[1]->ProductInfo->ProductCode;
$Currency = 'usd';
$Options = 'emailsupport'.';'.'oneuser1';
try {
    $upgradeOptions = $client->getProductUpgradeOptionsPrice($sessionID, $subscriptionReference, $productCode, $Currency, $Options);
}
catch (SoapFault $e) {
    echo "upgradeOptions: " . $e->getMessage();
    exit;
}
var_dump("upgradeOptions", $upgradeOptions);
try {
    $upgradadebleProduct = $client->getProductByCode($sessionID, $productCode);
}
catch (SoapFault $e) {
    echo "upgradadebleProduct: " . $e->getMessage();
    exit;
}
$upgradadebleProductID = $upgradadebleProduct->AvangateId;
$Options = 'emailsupport'.','.'oneuser1';//Replace the ; separator with , for use with query strings
 
//$upgradelink = "https://secure.avangate.com/order/upgrade.php?LICENSE=".$subscriptionReference; //This is the simplest upgrade link you can build and use to generate a tokenized upgrade checkout URL
$upgradelink = "https://store.avancart.com/order/upgrade.php?LICENSE=".$subscriptionReference."&UPGRADEPROD=".$upgradadebleProductID."&UPGRADEOPT=".$Options; //make sure to use your custom domain or secure.avangate.com otherwise
$IdCustomer = $allsubscriptions[0]->AvangateCustomerReference;
$CustomerType = 'AvangateCustomerReference';
$Url = $upgradelink;
$ValidityTime = 10;
$ValidationIp = null;
try {
    $upgradeSSOURL = $client->getSingleSignOnInCart($sessionID, $IdCustomer, $CustomerType, $Url, $ValidityTime, $ValidationIp);
}
catch (SoapFault $e) {
    echo "ssoLINK: " . $e->getMessage();
    exit;
}
header("Location: $upgradeSSOURL");