Codeigniter form validation in config depends on another input - php

Question

I'm using Codeigniter form validation by config (not setting rules manually). What I need, is setting required rule depending on the other field. For example, Imagine we have the following rules:
'user' => array(
array(
'field' => 'user[phone]',
'rules' => 'required'
),
array(
'field' => 'user[email]',
),
array(
'field' => 'user[foo]',
//'rules' => 'required'
)
),
foo input must be required based on email field.
Note: It can be done with callback function, but it makes it a bit difficult in big applications. Any idea?

Answer 1

In your APPPATH.'config/form_validation.php' file set separated rule arrays
$config = array(
'yes_email' => array(
array(
'field' => 'user[phone]',
'rules' => 'required'
),
array(
'field' => 'user[email]',
),
array(
'field' => 'user[foo]',
'rules' => 'required'
)
),
'no_email' => array(
array(
'field' => 'user[phone]',
'rules' => 'required'
),
array(
'field' => 'user[email]',
),
array(
'field' => 'user[foo]',
)
),
);
, then in controller use what ever rule set you want. In example
if ($this->form_validation->run($rule) == FALSE) {
$this->load->view('myform');
} else {
$this->load->view('formsuccess');
}
Before this check, you should determine what rule you need there with something like:
$rule = 'no_email'; // set default value
switch($this->input->post('email')) {
case false:
break;
default:
$rule = 'yes_email'; // email has been posted / needed by app etc.
}
More in docs.