PHP Session judgment: New additions to session state judgment in PHP 5.4

In previous versions of PHP, to determine if the session was valid, you could only use the following methods:
Session_Start ();
if (Isset ($_session))
{
echo "Started";
}
Else
{
echo "Not Started";
}
In PHP 5.4 (forthcoming release), the state of the session is subdivided, you can use the following methods to determine:
Session_Start ();
$status = Session_status ();
if ($status = = php_session_disabled)
{
echo "Session is disabled";
}
else if ($status = = Php_session_none)
{
echo "Session-enabled but no session values created";
}
Else
{
echo "Session-enabled and session values created";
}
You can see that by using Session_status () you return a value of type int, indicating the various states of the session, such as the Prohibition (php_session_disabled), which does not exist
(Php_session_none)
, or the session has been set up (php_session_active) This article links http://www.cxybl.com/html/wlbc/Php/20120607/28693.html