Form Data reset before submit

Hi,

There are 2 things here:
- your code looks like to belong to Codeigntier 3 and not version 4
- in the view you need to prepare the form to allow re-population of the value. Read the following: https://codeigniter.com/user_guide/libra...g-the-form

What i started to use with PHP 7.* is the null coalesce operator to help me with this.
Consider the below:

In the model or the controller i have the fields set up like this:

PHP Code:

   $fields['flag_promix'] = [
            'name'       => 'flag_promix',
            'value'      => 1,
            'checked'    => $this->input->post('flag_promix') ?? $existingValues['flag_promix'] ?? NULL,
            'attributes' => [
                'class' => "custom-control-input",
                'id'    => 'flag_promix',
            ]
        ]; 


In the view i display the form as below:

PHP Code:

<?= form_checkbox($fields['flag_promix']['name'], $fields['flag_promix']['value'], $fields['flag_promix']['checked'],$fields['flag_promix']['attributes']) ?>

The magic is this piece of code in the controller (or model in my case):

PHP Code:

'checked'    => $this->input->post('flag_promix') ?? $existingValues['flag_promix'] ?? NULL, 


If the form has already been submitted then the value will be set by $this->input->post()
If the form has not been submitted yet, then this field will get the value from a database which i store in $existingValues array
If neither the post data nor the data base data has this value, then it is set to NULL but you can define a default value here as well.