Updating session variables


09-Oct-2020 05:24

It’s important for you to understand that once initialized, the Session class runs automatically.There is nothing you need to do to cause the above behavior to happen.If you are, however, and if you’re experiencing performance issues, then this note is exactly what you’re looking for.Sessions in previous versions of Code Igniter didn’t implement locking, which meant that two HTTP requests using the same session could run exactly at the same time.To mark an existing item as “tempdata”, simply pass its key and expiry time (in seconds!) to the However, this won’t remove the marker that makes this specific item to be tempdata (it will be invalidated on the next HTTP request), so if you intend to reuse that same key in the same request, you’d want to use Note This must be the last session-related operation that you do during the same request.After the value expires, or the session expires or is deleted, the value is automatically removed.Similarly to flashdata, tempdata variables are regular session vars that are marked in a specific way under the ‘__ci_vars’ key (again, don’t touch that one).

If you’ve used sessions in PHP before, you should be familiar with PHP’s $_SESSION superglobal (if not, please read the content on that link).

You can, as you’ll see below, work with session data, but the process of reading, writing, and updating a session is automatic.

Unless you’re developing a website with heavy AJAX usage, you can skip this section.

This was due to the specifics of how sessions worked, but is now no longer necessary with our new implementation.

However, it may happen that your application relied on these values, so here are alternative methods of accessing them: Code Igniter will usually make everything work out of the box.This detail was at the root of many issues and the main reason why Code Igniter 3.0 has a completely re-written Session library. Because it is likely that after trying to find the reason for your performance issues, you may conclude that locking is the issue and therefore look into how to remove the locks … Removing locks would be wrong and it will cause you more problems! Your issue is that you still have the session open, while you’ve already processed it and therefore no longer need it.



It’s designed to keep clean, so we just wipe everything down.… continue reading »


Read more