//-----------注销begin------------------------------------------
if ( $_GET['action'] == "logout" )
{
//注销前,记录最后一次成功登陆的IP及日期
include('conn.php');
$client_ip = $_SERVER["HTTP_CLIENTIP"];
$user_id = $_SESSION['user_id'];
echo $client_ip;
echo $user_id;
sleep(10);
mysql_query("update users SET user_last_log_ip = $client_ip,user_last_log_date = unix_timestamp(now()) where user_id = $user_id limit 1");
mysql_close($con);
//删除SESSION
unset($_SESSION['user_id']);
unset($_SESSION['user_email']);
unset($_SESSION['user_nickname']);
echo '<br>'.'注销成功!';
exit;
}