Hello! I'm new to php. 1 time I call the session session_start() when connecting to the database, 2 times session_start() when registering and so on, I read that the session needs to be called every time, but everything is in one code, so right? and what will happen?

    1 answer 1

    Calling session_start() again will not lead to anything. If you try to execute the code

     <? ini_set('error_reporting', E_ALL); ini_set('display_errors', 1); ini_set('display_startup_errors', 1); session_start(); session_start();

    That will get a warning

    Notice: A session had already been started - ignoring session_start () in ...

    This is because

    Sessions that use files (by default in PHP) block the session file immediately when the session is opened using the session_start () function or indirectly when session.auto_start is specified. After blocking, no other script can access the same session file until it is closed either when the script is terminated or when the session_write_close () function is called.

    http://php.net/manual/ru/session.examples.basic.php

    ps First of all, try to contact the documentation. Most of the questions will disappear.

    • And if I create sessions in different files and then connect them to 1 file of type session_start(); $_SESSION["steamid"] = "YES" session_start(); $_SESSION["steamid"] = "YES" and in another session_start(); $_SESSION["login"] = "YES" session_start(); $_SESSION["login"] = "YES" and connect them to 1 file, it will be a mistake, because there are 2 sessions, but 1 is the session_start() command? - Andrey B
    • And I don’t have such an error. Notice: A session had already been started - ignoring session_start () in ... - Andrey B
    • @AndreyB, the session is still the same. Any number of variables and any data structures can be stored in the session - this is a regular file with serialize - Gedweb
    • @Gedweb now you convinced me, ATP - Andrew B