MySQL

Код (Text):

1. <?php
2.  
3.  
4. define ("ITEMS_IN_SET", 10);
5.  
6. $id       = intval($_POST["id"]);
7. $auth_key    = $_POST["hash"];
8. $set       = intval($_POST["set"]);
9.  
10. if ($auth_key != h($id)) exit("req=false&error=auth_error");
11.  
12. $str = "SELECT names.name, names.all_sh, names.id, buildings.palace AS level, users.viewer_id FROM names JOIN buildings JOIN users WHERE names.id = buildings.id AND names.id = users.id ORDER BY buildings.palace DESC LIMIT ".($set * ITEMS_IN_SET).",".ITEMS_IN_SET;
13. $req = mysql_query($str, $db);
14. if (!$req) exit ("<xml>\n\t<req>false</req>\n\t<error>mysql_error</error>\n\t<s>0</s>\n</xml>");
15. echo "<xml>\n\t<req>true</req>";
16. while ($arr = mysql_fetch_assoc($req)) {
17.    echo "\n\t<item>";
18.    echo "\n\t\t<name>".$arr["name"]."</name>";
19.    echo "\n\t\t<all_sh>".$arr["all_sh"]."</all_sh>";
20.    echo "\n\t\t<level>".$arr["level"]."</level>";
21.    echo "\n\t\t<viewer_id>".$arr["viewer_id"]."</viewer_id>";
22.    echo "\n\t</item>";
23. }
24. echo "\n</xml>";
25.  
26. ?>

Как засунуть в echo столбец из buildings.farm ?