CodeIgniter form validation optional based on value

Question

I'm setting up a form with CI and I'm using the form validation to help me with this.

At the moment I have different rules setup, like

$this->form_validation->set_rules('first_name', 'First Name', 'required|xss_clean');

But in my form I have a checkbox, enabling the checkbox will show some new inputs that are required when the checkbox is checked. When the checkbox is unchecked these fields are not required.

What would be the best method to do this in CI?

// Set validation rules
$this->form_validation->set_rules('first_name', 'First Name', 'required|xss_clean');
$this->form_validation->set_rules('last_name', 'Last Name', 'required|xss_clean');
// Some more rules here

if($this->form_validation->run() == true) {
    // Form was validated
}

envysea · Accepted Answer · 2013-01-17 15:57:27Z

7

I faced something just like this a couple months ago. I just added a short if-statement.

It looked something like this (using address for example):

$this->form_validation->set_rules('home_address', '"Home Address"', 'required|trim|xss_clean|strip_tags');
$this->form_validation->set_rules('unit', '"Unit"', 'trim|xss_clean|strip_tags');
$this->form_validation->set_rules('city', '"City"', 'required|trim|xss_clean|strip_tags');
$this->form_validation->set_rules('state', '"State"', 'required|trim|xss_clean|strip_tags');
$this->form_validation->set_rules('zip', '"Zip"', 'required|trim|xss_clean|strip_tags');

//checkbox formatted like this in the view: form_checkbox('has_second_address', 'accept'); 
if ($this->input->post('has_second_address') == 'accept')
{
    $this->form_validation->set_rules('street_address_2', '"Street Address 2"', 'required|trim|xss_clean|strip_tags');
    $this->form_validation->set_rules('state_2', '"State 2"', 'required|trim|xss_clean|strip_tags');
    $this->form_validation->set_rules('city_2', '"City 2"', 'required|trim|xss_clean|strip_tags');
    $this->form_validation->set_rules('zip_2', '"Zip 2"', 'required|trim|xss_clean|strip_tags');
}

if($this->form_validation->run() == true) {
    //example
    //will return FALSE if empty
    $street_address_2 = $this->input->post('street_address_2');
    //and so on...
}

I'm not sure if this is the Codeigniter way or not, but last time I checked I couldn't find a "best method" way. This definitely gets the job done, and it at minimum allows you to take control over a users $_POST variables.

Anyways, I hope this helps

answered Jan 17, 2013 at 15:57

envysea

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3 Comments

woutr_be Over a year ago

Thanks, the same solution as Mudshark posted, an example always helps!

envysea Over a year ago

Ha. Yeah, I wrote all this out, I figured I might as well submit it still.

NaveenThally Over a year ago

i'm Using a config array for validation and have placed it separately in config folder, and i have the same issue how to enable validation based on the check box status in config array

Mudshark · Accepted Answer · 2013-01-17 15:54:35Z

6

if($this->input->post('checkbox_name')){
    // add more validation rules here
}

answered Jan 17, 2013 at 15:54

Mudshark

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2 Comments

woutr_be Over a year ago

Yes, that's what I thought at first, I was just looking for any validation rule instead of doing it in an if() (which I'm using now already)

NaveenThally Over a year ago

i'm Using a config array for validation and have placed it seperately in config folder, and i have the same issue how to enable validation based on the check box status in config array

user1157393 · Accepted Answer · 2013-01-17 15:53:23Z

0

you could use javascript / jquery to set the value of a hidden field to true or false depending of whether the checkbox has been checked.

Then in your controller check with a conditional

if ($hidden_field) {
   //run more validation.
}

answered Jan 17, 2013 at 15:53

user1157393

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