I am trying to create a new customer via XML-RPC. I followed the tutorial here
https://www.odoo.com/documentation/8.0/api_integration.html
I am able to create new res.Partner and fill all the contact information. I failed with setting the Tags (category_id).
$resp = $models->execute_kw($db, $uid, $password, 'res.partner', 'write', array(array($userID), array('category_id'=>array(4,array($tagID),0)) ));
The question is how to set many2many relation using PHP and XML-RPC? I am aware of the API here https://www.odoo.com/documentation/8.0/reference/orm.html#openerp.models.Model.write but there is no description how to call it from PHP.
At least some hint would be enought