Refer to array in custom form validation rule in codeigniter

Question

I want to create custom validation rule in CodeIgniter 3 but I want to validate posted array (not a string). In CodeIgniter docs, I saw array are also supported.

HTML:

<select name="bonus[]" class="form-control"> ... </select>
<select name="bonus[]" class="form-control"> ... </select>
<select name="bonus[]" class="form-control"> ... </select>

VALIDATION:

$this->form_validation->set_rules("bonus[]", "Bonuses", "all_unique");

VALIDATION RULE all_unique

public function all_unique($array)
{           
    $this->CI->form_validation->set_message('all_unique', '%s are not unique.');

    if(count(array_unique($array))<count($array))
    {
        // Array has duplicates
        return FALSE;
    }
    else
    {
        // Array does not have duplicates
        return TRUE;
    }
}

In general I want to check if selected bonuses are not duplicate. (Number of select bonus fields can vary.)

The problem with this is the value passed to all_unique validation method is passed as a string not as an array, it is the value of the first bonus[] field. How can I validate array of send bonus[].

Saty · Accepted Answer · 2016-06-17 07:18:17Z

1

You need to use callback in set_message to call all_unique function

$this->form_validation->set_rules("bonus[]", "Bonuses", "callback_all_unique");

To get array field value inside call back use post method as

function all_unique()
{           
    $array = $this->input->post('bonus');// get bonus value
    $this->CI->form_validation->set_message('all_unique', '%s are not unique.');

    if(count(array_unique($array))<count($array))
    {
        // Array has duplicates
        return FALSE;
    }
    else
    {
        // Array does not have duplicates
        return TRUE;
    }
}

answered Jun 17, 2016 at 7:18

Saty

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6 Comments

energetyk Over a year ago

I don't mention this. I override ValidationForm library. It this case I think it isn't a problem.

Saty Over a year ago

How you override it??? and validation rule is is_unique not all_unique

energetyk Over a year ago

I mean i create own MY_Form_validation.php file in application/libraries. And my custom validation rules are there.

Saty Over a year ago

okk have you check with $array = $this->input->post('bonus'); inside your function???

energetyk Over a year ago

Yes this works, but i need something more abstract. In example require funcion in CI library works fine with arrays.

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