Hey there, let's get this error sorted out for you—no complex dev jargon, just simple steps you can follow.

What's causing this? #

This error means your CodeIgniter application can't use the files session driver you have configured. Usually this is either a missing configuration setting, a missing storage folder, or a permission issue.

Step-by-Step Fixes: #

1. Check your Session Configuration File

   • Navigate to C:\xampp\htdocs\reseauxfinal\application\config\config.php and open it with a text editor (like Notepad or VS Code).
   • Find the line that says $config['sess_driver'] = 'files';—make sure it's set exactly to 'files' (no typos!).
   • Next, look for $config['sess_save_path']. Update this line to point to a valid folder where PHP can store session files. A safe option is:

     $config['sess_save_path'] = APPPATH . 'sessions/';
     

     Or you can use an absolute path:

     $config['sess_save_path'] = 'C:\xampp\htdocs\reseauxfinal\application\sessions';
     

2. Create the Session Storage Folder

   • If the sessions folder doesn't exist in your application directory, create it right now (just make a new folder named sessions).
   • Give this folder write permissions:
     • Right-click the sessions folder → Properties → Security tab → Edit.
     • Select your user account (or "Everyone" for simplicity) and check the Write box under "Allow". Click OK to save changes.

3. Verify PHP Session Settings in XAMPP

   • Open your XAMPP Control Panel, click Config next to Apache, then select PHP (php.ini).
   • Search for session.save_handler—ensure it's set to files:

     session.save_handler = files
     

   • Search for session.save_path—you can either leave it blank (so CodeIgniter uses its own setting) or set it to the same sessions folder path you used earlier.

4. Restart Apache

   • Go back to XAMPP Control Panel, stop Apache, then start it again. This makes all your configuration changes take effect.

If it's still not working: #

Double-check that the file C:\xampp\htdocs\reseauxfinal\system\libraries\Session\drivers\Session_files_driver.php exists. If this file is missing, your CodeIgniter system files might be incomplete—you'll need to re-add this file from a fresh CodeIgniter installation matching your project's version.

内容的提问来源于stack exchange，提问作者Meriem Moussi