Bruce

Here are the config options I specifically want to add as quantity: 1: "configoptions": { "configoption": [ { "id": 866, "option": "Add-on 1 of 2", "type": "quantity", "value": 0 }, { "id": 865, "option": "Add-on 2 of 2", "type": "quantity", "value": 0 }, It seems it works to add 1, with the serialized array as: a:1:{i:855;i:1;} or a:1:{i:856;i:1;} - as soon as I try add both with a:2:{i:855;i:1;i:856;i:1;} it adds neither??

Hi there - I'm struggling to understand the relationship between "1" and 999 below in 'configoptions' - what specifically does the "1" and the 999 reference? If I wanted to add 2 config options to a single product (say 123 and 456) - what would the below configoptions line change to? http_build_query( array( 'action' => 'AddOrder', // See https://developers.whmcs.com/api/authentication 'username' => 'IDENTIFIER_OR_ADMIN_USERNAME', 'password' => 'SECRET_OR_HASHED_PASSWORD', 'clientid' => '1', 'pid' => array(1,1), 'domain' => array('domain1.com', 'dómáin2.com'), 'idnlanguage' => array('', 'fre'), 'billingcycle' => array('monthly','semiannually'), 'addons' => array('1,3,9', ''), 'customfields' => array(base64_encode(serialize(array("1" => "Google"))), base64_encode(serialize(array("1" => "Google")))), 'configoptions' => array(base64_encode(serialize(array("1" => 999))), base64_encode(serialize(array("1" => 999)))), 'domaintype' => array('register', 'register'), 'regperiod' => array(1, 2), 'dnsmanagement' => array(0 => false, 1 => true), 'nameserver1' => 'ns1.demo.com', 'nameserver2' => 'ns2.demo.com', 'paymentmethod' => 'mailin', 'responsetype' => 'json', ) ) dsdsds