Form Validation validating blank values with min_length and valid_email rules

Yeah. I found a logic for working with blank fields.

For now I'll add an isset rule if the blank field is set but with an empty string. The logic will be like this:

PHP Code:

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * Class Issue
 */
class Issue extends CI_Controller
{

    public function index()
    {
        $this->load->library('form_validation');

        // Test: If you add one character in username or email the validation will run and show the errors...
        //$userdata = ['username' => '', 'email' => ''];
        $userdata = $this->input->get();

        $this->form_validation->set_data($userdata);
        $this->form_validation->set_rules([
            [
                'field' => 'username',
                'label' => 'Username',
                'rules' => 'min_length[5]|max_length[32]'
                    . (isset($userdata['username']) && $userdata['username'] === '' ? '|isset' : ''),
            ],
            [
                'field' => 'email',
                'label' => 'Email',
                'rules' => 'valid_email'
                    . (isset($userdata['email']) && $userdata['email'] === '' ? '|isset' : ''),
            ],
        ]);

        if ( ! $this->form_validation->run())
        {
            var_dump($this->form_validation->error_array());
            exit;
        }

        foreach ($userdata as $key => $val)
        {
            if ( ! in_array($key, ['username', 'email']))
            {
                unset($userdata[$key]);
            }
        }


        if (empty($userdata))
        {
            var_dump('Nothing to update. Stop here.');
            exit;
        }

        echo 'Validated! Data to be updated: ';
        var_dump($userdata);
    }

} 


I did some research and I saw that there was a issue like this a long time ago.

 natanfelles.github.io