用cookie显示浏览历史时， unserialize出错解决思路

用cookie显示浏览历史时， unserialize出错

PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php $id = $_GET['id']+0;echo '<a href="history.php?id=' . ($id-1) . '">上一页<br>';echo '<br><a href="history.php?id='%20.%20(%24id+1)%20.%20'">下一页</a>';    if(isset($_COOKIE['his'])) {    //echo $_COOKIE['his'];exit;    $data = unserialize($_COOKIE['his']);    $url = $_SERVER['REQUEST_URI'];    $data[] = $url;    $data = array_unique($data);           if(count($data) >10) {        array_shift($data);    }        $urls = serialize($data);    setcookie('his',$urls,time()*2*24*3600);} else {    $url = $_SERVER['REQUEST_URI'];    $data[] = $url;    $urls = serialize($data);    setcookie('his',$urls,time()*2*24*3600);}?><br><br>

• 浏览历史

在浏览器中打开并在地址栏上输入id后，浏览器给了一个提示

HTML code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Notice: unserialize() [function.unserialize]: Error at offset 9 of 41 bytes in D:\server\apache\www\20120413\history.php on line 16

而且显示的历史记录也就一条，我想可能和上面的错误有关，可找不到解决的办法，语法上我看了几片，暂时没发现上面错误，望达人解惑！！！！！！

------解决方案--------------------
$data = unserialize(stripslashes($_COOKIE['his']));

这样试试，，不对打印出cookie值贴上来，