Questions about sessions in CI 3.0

1. I see 3 method for accessing/creating sessions:

PHP Code:

$name = $_SESSION['name'];

// or:

$name = $this->session->name

// or:

$name = $this->session->userdata('name'); 


What do you recommand for using and why ?

Files Driver

2. Under what circumstances should I change 'sess_save_path' from NULL ?

3. I have changed 'sess_save_path' from NULL to "sessions", but nothing happend.
Where should a I create the "sessions" folder ?

Database Driver

4. Can I use $_SESSION and Database Driver ?
When we use $_SESSION, the writting/reading are still going through Session library ?

1. I see 3 method for accessing/creating sessions:

PHP Code:

$name = $_SESSION['name'];

// or:

$name = $this->session->name

// or:

$name = $this->session->userdata('name'); 


What do you recommand for using and why ?

Personally, I recommend using the $_SESSION superglobal. One of my goals while working on the library was to make it as close as possible to PHP's own ways.

Files Driver

2. Under what circumstances should I change 'sess_save_path' from NULL ?

Under ALL circumstances. It's NULL by default for one simple reason - there's no universal value, you must configure it for yourself.

3. I have changed 'sess_save_path' from NULL to "sessions", but nothing happend.
Where should a I create the "sessions" folder ?

It's an absolute path. Please read the documentation, it's explained in detail.

Database Driver

4. Can I use $_SESSION and Database Driver ?
When we use $_SESSION, the writting/reading are still going through Session library ?

Yes.

Thanks, now I understand it.

I'm using the 'files' session driver and these are the settings that work for me:

$config['sess_save_path'] = '/var/www/html/tmp/sessions';

Permissions on the tmp and sessions directories are set to '777' and ownership is 'root'

The questions are:
How safe are these?
Should I move the tmp directory?
Should I move the sessions directory?

CI 3.1 Kubuntu 19.04 Apache 5.x  Mysql 5.x PHP 5.x PHP 7.x
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