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    session_save_path

    (PHP 4, PHP 5, PHP 7, PHP 8)

    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 = null): string|false

    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。これに null でない値を指定すると、 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。

    戻り値

    現在のデータ保存先ディレクトリのパスを返します。 失敗した場合に false を返します

    変更履歴

    バージョン 説明
    8.0.0 path は、nullable になりました。

    参考

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    User Contributed Notes 5 notes

    up
    57
    mdibbets at outlook dot nospam
    11 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
    36
    alvaro at demogracia dot com
    14 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!
    up
    16
    sampathperera at hotmail dot com - Sri Lanka
    16 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
    7
    ohcc at 163 dot com
    7 years 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
    0
    Ale
    7 months ago
    This function seems to simply return the value of session.save_path from the [Session] section of php.ini. This has an important implication: the returned value can as well look like "0;0660;/var/lib/php/sessions", which is of course no valid path.

    A way to extract the path despite the possible semicolons can be something like:

    $ssp = explode(';', session_save_path());
    echo end($ssp);

    As end takes the array by reference, it's not possible to make a real one-liner without relying on an intermediate variable.
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