CI Version and first steps

Hello,

I have taken over a project that was created with CI and is unfortunately very poorly documented. Previously PHP7.4 was used, now PHP8.3 is to be used. Since I currently have 0 experience with CI, the first question I have is:

1. which CI version was used and where can I find it? I can't find “@version”, only “@since”
2. is an update necessary (I think so, because there are many “deprecated” warnings) and how time-consuming is an update?

Greetings, Frank

Edit: PHP5.6 was used

See version in https://github.com/codeigniter4/CodeIgni...er.php#L59

Simple CI 4 project for beginners codeigniter-expenses ( topic )

If you have a running project just do this to see the CodeIgniter Version.

PHP Code:

<?php echo CI_VERSION; ?>

What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )