Question

$db->query("SELECT * FROM ".DB_PREFIX."users WHERE uid='".$uid_id."' AND login='ExpressCheckoutUser'");
                if ($db->moveNext())
                {

$db->assignStr("address1", $_REQUEST['address_street']);
$db->assignStr("city", $_REQUEST['address_city']);
$db->assignStr("state", $_REQUEST['address_state']);
$db->assignStr("fname", $_REQUEST['first_name']);
$db->assignStr("lname", $_REQUEST['last_name']);
$db->assignStr("email", $_REQUEST['payer_email']);

$db->assignStr("country", $country_code);
$db->assignStr("zip", $_REQUEST['address_zip']);
$db->update(DB_PREFIX."users", "WHERE uid='".$uid_id."'");
$db->reset();
}

everytime i make payment via paypal, my info will be captured in database but i wanted to prevent duplicates. so how do i go around it? Or should I check email duplicates?

EDIT
As far as I can tell, uid is set to primary by pinnaclecart. so wouldnt it be ‘dangerous’ to set it to be unique instead?

Answer 1

First and last name are nice, but everything but unique. I know a few people that have the same name I do, so I guess building a unique index on those two columns will only frustrate, not help. The thing that makes me unique though is that I am the only one who has both my e-mail address and password, so I think that would be a better candidate.

ALTER TABLE users ADD UNIQUE unique_emailaddress ( email );

That should at least help with some of the duplicates, but not all: users may have multiple e-mail addresses (I know I do ;)), but it still better than an arbitrary combination of first and last name which isn’t unique at all.