I have been through the entire support site and can not seem to find a php sample that shows how to query the contacts collection for specific email address. I need to be able to find out if a contact exists before trying to add the contact to a list. If the contact is new then the add contact php sample code works fine. But it the contact is already in the system, then I need the contact id in order to add the email to a special list.
We have added a form to the public website to allow customers to sign up for contest.
... View more