[SOLVED] Multi-Select or Arrayed Values Validation

I've tried the following two pieces of code (I've hardcoded the "passed" values into the run method for the sake of clarity):

PHP Code:

$validation = \Config\Services::validation();
$validation->setRule('groups', 'Groups', ['in_list[manager,personnel]']);
if(!$validation->run(['groups' => ['manager', 'personnel']]))
        return redirect()->back()->withInput(); 


AND:

PHP Code:

$validation = \Config\Services::validation();
$validation->setRule('groups[]', 'Groups', ['in_list[manager,personnel]']);
if(!$validation->run(['groups' => ['manager', 'personnel']]))
        return redirect()->back()->withInput(); 


The idea here is that a user is selecting multiple values in a drop down and submitting them via form. However, the return call is always being executed denoting an error. How do I create a rule that validates an array of values for one field?
The following works, but appears an inelegant solution:

PHP Code:

$validation = \Config\Services::validation();
$validation->setRule('groups[]', 'Groups', ['in_list[manager,personnel]']);
foreach(['manager', 'personnel'] as $group)
        if(!$validation->run(['groups' => $group]))
                return redirect()->back()->withInput(); 


Halberd | CodeIgniter 4 PowerShell Setup Script

See https://codeigniter4.github.io/CodeIgnit...array-data

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

Thank you kenjis, I completely overlooked this section.

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