I'm totally new in Mailshimp stuff and I can't find anything on the web to disable the double opt-in. I don't use any Mailchimp API, I just have the form mailchimp gave me to put in my html.
Any idea without using the API or if I have to, by using the API ?
Thank you !
require('Mailchimp.php');
$api = new Mailchimp( $api_key );
$result = $api->lists->subscribe( $api_key, $id, $data['email'], $merge_vars, 'html', false );
6th parameter defines that whether to disable the opt-in or not. Pass it as false will disable it.
For more info refer:-http://apidocs.mailchimp.com/api/2.0/lists/subscribe.php