Solutions to Errors in CI Framework Autoloading session

When many programmers use session in CI, they start loading session automatically and then the website errors as follows: In order to use the Session class you are required set an encryption key

Below is a look at problem solving.

Tip note: If you want to use the session class, you must set an encrypted key!Let's set one up, after all, for security reasons.

Open application/config/config.php to find Encryption Key

/*
|--------------------------------------------------------------------------
| Encryption Key
|--------------------------------------------------------------------------

| If you use the Encryption class or the Session class you
| MUST set an encryption key.  See the user guide for info.

*/
$config['encryption_key'] = 'xxxxx';// Add a key here and it will work!