php[world] 2019 — 25 years of PHP

session_save_path

(PHP 4, PHP 5, PHP 7)

session_save_path現在のセッションデータ保存パスを取得または設定する

説明

session_save_path ([ string $path ] ) : string

session_save_path() は、 現在のセッションデータ保存パスを返します。

パラメータ

path

セッションデータのパス。これを指定すると、 データを保存するパスが変更されます。ただしそのためには session_start() がコールされる前に session_save_path() がコールされている必要があります。

注意:

いくつかのオペレーションシステムでは、多くの小さなファイルを効率的に 処理するファイルシステム上にパスを指定することが望ましいです。 例えば、Linux では ext2fs よりも reiserfs の方が性能面でより 優れています。

返り値

現在のデータ保存先ディレクトリのパスを返します。

参考

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User Contributed Notes 5 notes

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51
mdibbets at outlook dot nospam
5 years ago
I made a folder next to the public html folder and placed these lines at the very first point in index.php

Location of session folder:

/domains/account/session

location of index.php

/domains/account/public_html/index.php

What I placed in index.php at line 0:

<?php
ini_set
('session.save_path',realpath(dirname($_SERVER['DOCUMENT_ROOT']) . '/../session'));
session_start();

This is the only solution that worked for me. Hope this helps someone.
up
11
ohcc at 163 dot com
1 year ago
If session.save_handler is set to files, on systems that have maximum path length limitations, when the session data file's path is too long, php may get you an error like "No such file or directory" and fails to start session, although the session-saving folder really exists on the disk.

You should:

1. Keep the session-saving folder's absolute path not too long
2. If you're with PHP 7.1+, don't set session.sid_length to a number too great, such as 255

I once got stuck with this problem on Windows and wasted hours to solve it.
up
30
alvaro at demogracia dot com
9 years ago
Debian does not use the default garbage collector for sessions. Instead, it sets session.gc_probability to zero and it runs a cron job to clean up old session data in the default directory.

As a result, if your site sets a custom location with session_save_path() you also need to set a value for session.gc_probability, e.g.:

<?php
session_save_path
('/home/example.com/sessions');
ini_set('session.gc_probability', 1);
?>

Otherwise, old files in '/home/example.com/sessions' will never get removed!
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13
sampathperera at hotmail dot com - Sri Lanka
11 years ago
Session on clustered web servers !

We had problem in PHP session handling with 2 web server cluster. Problem was one servers session data was not available in other server.

So I made a simple configuration in both server php.ini file. Changed session.save_path default value to shared folder on both servers (/mnt/session/).

It works for me. :)
up
-1
hrushiemail at gmail dot com
5 months ago
<?php
ini_set
('session.save_path',realpath(dirname($_SERVER['DOCUMENT_ROOT']) . '/tmp'));
ini_set('session.gc_probability', 1);
session_start();

?>

(for using above code create a tmp folder/directory in your directory)
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