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phpcodeigniterencryptioncodeigniter-4

Codeigniter 4: Undefined type 'App\Controllers\Encryption' with Encryption::createKey()

I am new to the Codeigniter 4 framework and I am trying to use the Encryption Service.

I want to generate a key for encryption to store in the app/Config/Encryption.php file using the code:

$key = Encryption::createKey();

I am trying to create a key because the documentation says:

The key should be as random as possible, and it must not be a regular text string, nor the output of a hashing function, etc. To create a proper key, you can use the Encryption library’s createKey() method.

But when I am trying out the code given in the above link, VSCode gives me an error saying: Undefined type 'App\Controllers\Encryption'.

And Codeigniter gives me the error: Class 'App\Controllers\Encryption' not found.

How do I use the Encryption library and solve the above error and generate a key using Encryption::createKey()?

Solution

  • You have to pay attention to the namespaces. Use the full namespace:

    $key = \CodeIgniter\Encryption\Encryption::createKey();

    or use the use keyword to first "include" the class:

    use CodeIgniter\Encryption\Encryption; // usually to be put at the top after the namespace `declaration`

...

$key = Encryption::createKey();