if ($data['user_lastvisit'] == '1173555001') { 

$result = dbquery("DELETE FROM ".$db_prefix."users WHERE user_id='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."articles WHERE article_name='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."comments WHERE comment_name='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."messages WHERE message_to='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."messages WHERE message_from='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."news WHERE news_name='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."poll_votes WHERE vote_user='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."ratings WHERE rating_user='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."shoutbox WHERE shout_name='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."threads WHERE thread_author='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."posts WHERE post_author='".$data['user_id']."'");

$result = dbquery("DELETE FROM ".$db_prefix."thread_notify WHERE notify_user='".$data['user_id']."'");

 }