PHP会话跟踪末与文件处理系统一（43），_PHP教程

＜?<span>php
</span><span>//</span><span> 初始化session.</span>
<span>session_start();
</span><span>/*</span><span> 删除所有的session变量..也可用
unset($_SESSION[&lsquo;xxx&rsquo;])逐个删除。</span><span>*/</span><span>
$_SESSION </span>= array();<span>//</span><span>或session_unset();</span><span>
/*</span><span>删除sessinid.由于session默认是基于cookie的，所
以使用setcookie删除包含session id的cookie.</span><span>*/</span>
<span>if</span><span> (isset($_COOKIE[session_name()])) {
setcookie(session_name(), </span><span>'</span> <span>'</span>, time()-<span>42000</span><span>,
</span><span>'</span><span>/</span><span>'</span><span>);
}
</span><span>//</span><span> 最后彻底销毁session.</span>
<span>session_destroy();
</span>?＞