<?php
if (isset($_POST['u']) && isset($_POST['c']) && isset($_POST['d'])) {
    $user = $_POST['u'];
    $category = $_POST['c'];
    $data = $_POST['d'];
    $con = mysql_connect("173.192.226.38", "mmpr_sh", "acb132");
    if (!$con) {
        die("Could not connect: " . mysql_error());
    }
    mysql_select_db("mmpr_sh", $con);
    $result = mysql_query("SELECT ".$category." FROM mmpr_sh WHERE name = '".$user."';");
    while ($row = mysql_fetch_array($result)) {
        $temp = $row[$category]+data;
    }
    mysql_query("UPDATE mmpr_sh SET ".$category."='".$temp."' WHERE name = '".$user."';");
}
?>