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when toggle format what by license comment
Sep 10, 2012 at 17:58 comment added Andrei Iancu Not sure I understand... Using get_users (which I didn't know about, thanks!), WP would need to return an array of all the users where the value for meta_key=Referral is not empty (which should never be the case) and then check that the randomly generated number is not equal to any of those in the array..
Sep 10, 2012 at 17:37 history answered westondeboer CC BY-SA 3.0