function MySessionClear()
{
//销毁所有的Session
//这之后即使对$_SESSION变量存取，也不会影响其它PHP请求
MySessionStart();
session_unset();
session_destroy();
return true;
}
function MySessionClear()
{
MySessionStart();
session_unset();
//释放所有$_SESSION变量，$_SESSION变为array()
session_destroy();
//结束Session会话，删除Session文件，释放对应的SessionID
//调用session_destroy函数后，对$_SESSION的任何操作，都将对其它PHP无效
//调用2次session_destroy函数会报错：session_destroy(): Trying to destroy uninitialized session
}
* First, we update the cookie to have our (possibly new) session id.
* Then we check if we need to remove the cookie and re-set it (in case they have finished a conversion, then continued browsing the site).
* If we do need to re-set the cookie, we destroy the old session and re-start it. We may or may not get a new session id depending on the php version, that doesn't really matter.
* If that's ok (we don't need to re-set the cookie), we don't need to do anything else.
*
* @see TPUtil::UpdateSessionCookie
* @see TPUtil::RemoveCookie
* @see MySessionStart
*/
if (isset($_COOKIE[TRACKPOINT_COOKIE_NAME])) {
LogMessage(__FILE__, __LINE__, $ip, $trackpoint_sessionid, 'Cookie is set (' . $_COOKIE[TRACKPOINT_COOKIE_NAME] . ')', $userid);
$TPUtil->UpdateSessionCookie($trackpoint_sessionid, $_COOKIE[TRACKPOINT_COOKIE_NAME]);
if ($TPUtil->RemoveCookie($_COOKIE[TRACKPOINT_COOKIE_NAME], $trackpoint_sessionid)) {
LogMessage(__FILE__, __LINE__, $ip, $trackpoint_sessionid, 'Cookie is set for removal', $userid);
session_destroy();
MySessionStart();
$trackpoint_sessionid = session_id();
$neednewcookie = true;
}
if (!$neednewcookie) {
exit;
}
}
/**
* Break up the url. We use special placeholders in the get string to mark whether it's a campaign, ppc or "other".
*/
$original_url = parse_url($landingpage);
if (isset($original_url['query'])) {
parse_str($original_url['query'], $urlparts);
} else {
$urlparts = array();
