Thread: upsert question

Hi all,

I want to insert contacts in salesforce if contacts do not exist and update the contacts details if they do exist.


In my code I use $result = $client->upsert(array($sObject));
instead of $result = $client->create(array($sObject));

is it correct?

how does sf know if the contact exist (and then perform an update)? Is it because I should pass the unique identifier for the client along with other info? If yes, what is the field's name I should use?


$contacts = array();
$contacts['FirstName'] = $fname';
$contacts['LastName'] = $lname';
$contacts['Phone'] = $pnumber';
$contacts['Email'] = $'email';


Many thanks