<?php
include("config.php");

                $subid = mysql_real_escape_string($_GET['SubId']);     # Username of the user that earned the reward(s).
                $earn = "0.50";               # Amount that the user has earned.

                $query_add_credit  = mysql_query("UPDATE [TABLE] SET [row=row=+]".$earn." WHERE uid='".$subid."'");
                        mysql_close();
?>