session_status

(PHP >=5.4.0)

session_status — 現在のセッションの状態を返す

説明

int session_status ( void )

session_status() を使うと、現在のセッションの状態を取得できます。

返り値

セッションが無効な場合は PHP_SESSION_DISABLED
セッションが有効だけれどもセッションが存在しない場合は PHP_SESSION_NONE
セッションが有効で、かつセッションが存在する場合は PHP_SESSION_ACTIVE

参考

session_start() - 新しいセッションを開始、あるいは既存のセッションを再開する

add a note User Contributed Notes session_status - [2 notes]

down

ive_insomnia at live dot com ¶

3 months ago


simple session_start() request to avoid warning:



<?php

if (!$_SESSION) {session_start();}

// your code

?>

Or similar code works, but give a warning.



<?php

if(session_status() != 2) {session_start();}

// your code

?>

This option work fine without warning.



0 = PHP_SESSION_DISABLED

1 = PHP_SESSION_NONE

2 = PHP_SESSION_ACTIVE

down

php at pointpro dot nl ¶

2 months ago


The advice of ive_insomnia at live dot com should be taken with great care.



First of all, while his use case for session_status is valid, a simpler way to avoid the warning is:



<?php

if (!isset($_SESSION)) { session_start(); }

?>



The example of session_status uses the raw values of constants (2 in this case) created specifically for the purpose of not having to use magic numbers.



Better code would be:



<?php

if (session_status() !== PHP_SESSION_ACTIVE) {session_start();}

?>



The same can be done using



<?

if (session_id() === "") { session_start(); }

?>



The use of this function is lies more towards status management: change the behavior of a script when sessions are disabled altogether, for example.

add a note