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2024-10-18T06:45:37Z

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1>Stevenf: Very minor spelling correction: 'There's' refers to a singular way to do something, whereas 'There are' refers to various ways to do something.

2015-03-20T05:32:54Z

Very minor spelling correction: 'There's' refers to a singular way to do something, whereas 'There are' refers to various ways to do something.

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{{Managing a Moodle site}}
== What is the purpose of Sessions? ==
Web applications are "stateless". That is, by nature, any information stored in program variables is lost each time a script completes. That happens on every page. So for anything other than completely trivial scripts you need to have a way of storing information for that user for the current login. There are various ways to do this but the simplest is an implementation of PHP's native $_SESSION[] array that will keep information for a particular user on the same PC for a short period of time.

== What information do they hold?==
Sessions hold a range of information. The fact that you are logged on, your user profile, etc. Anything that needs to be available on all Moodle pages quickly.

== How are they constructed? ==
It's a PHP thing. It's very simple. Moodle issues the session_start() 'command' and then access PHP's $_SESSION variable. The contents of that automagically persist in a written file/database/memcached server.

== How long should they be retained for? ==
There is no reason to keep them beyond the current, well, session.

== Do I need to include them in my site backups? ==
No, not at all. The information required is for the immediate purposes of Moodle and is not required beyond that.

== Do I need to delete them? ==

Session files should automatically be deleted when they are no longer needed. If files are building up you should look into why.

=== How do I delete them? ===
It's not very elegant, but at quiet times you can simply delete the sessions directory in moodledata. The worst that will happen is that anyone logged in gets thrown off. A slightly more elegant solution would delete any files in that directory more than a few hours old.

==See also==

*[[Session handling]]

[[Category:FAQ]]

[[de:Sitzungen FAQ]]

Sessions FAQ - История изменений

Олег Давидович: 1 версия импортирована

1>Stevenf: Very minor spelling correction: 'There's' refers to a singular way to do something, whereas 'There are' refers to various ways to do something.