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Asked: 2026-05-29T16:10:54+00:00

What it says above. Unsurprisingly, I couldn’t find a clear answer to this. I

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What it says above. Unsurprisingly, I couldn’t find a clear answer to this.

I just want to know if calling it more than once in a script will cause a problem.

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  1. Editorial Team

    Quoting the manual :

    As of PHP 4.3.3, calling session_start() after the session was
    previously started will result in an error of level E_NOTICE.

    Also, the second session start will simply be ignored.

    So, it will not do much — except raise a notice, which indicates there is some kind of a problem ; which means you should not call this function more than once.

    Edit after @hakre’s comment : Just to be sure, I’ve tested with the following portion of code, which calls session_start() twice, after making sure errors and notices get reported :

    <?php
ini_set('display_errors', 'on');
error_reporting(E_ALL | E_STRICT);

session_start();
session_start();

    And I do get the following notice :

    Notice: A session had already been started - ignoring session_start() in /.../temp.php on line 6
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