<?
if (isset($user))mysql_query("DELETE FROM `chat_who` WHERE `id_user` = '$user[id]'");
mysql_query("DELETE FROM `chat_who` WHERE `time` < '".($time-120)."'");
echo mysql_num_rows(mysql_query("SELECT `id` FROM `chat_post`")).'/on:'.mysql_result(mysql_query("SELECT COUNT(*) FROM `chat_who`"),0);
?>