multiple $this->form_validation->run() not work in codeigniter - php

Question

Please help me, to validate address. if i select radio button Office, then Office Address required to submit. if i select radio button Residential, then Resi. Address required to submit.
The radio button name="mailing"
Here i share controller code:
public function addMemberForm(){
if(!$this->form_validation->run('add_form')){
$this->form_validation->set_error_delimiters('<span style="color:red">','</span>');
$this->load->view('admin_panel/add-member');
}
elseif($post['mailing'] == 'office'){
if(!$this->form_validation->run('office_address')){
$this->form_validation->set_error_delimiters('<span style="color:red">','</span>');
$this->load->view('admin_panel/add-member');
}
}
elseif($post['mailing'] == 'residential'){
if(!$this->form_validation->run('residential_address')){
$this->form_validation->set_error_delimiters('<span style="color:red">','</span>');
$this->load->view('admin_panel/add-member');
}
}
else{
$this->session->set_flashdata('add_member_msg','<span class="alert alert-success">Member insert successfully</span>');
return redirect('admin/add_member');
}
}
Here i share config->form_validation.php code:
$config = [
'add_form' =>[
[
'field' => 'mailing',
'label' => 'Mailing Address',
'rules' => 'required'
],
],
'office_address' =>[
[
'field' => 'office_address',
'label' => 'Office Address',
'rules' => 'required'
],
],
'residential_address' =>[
[
'field' => 'resi_address',
'label' => 'Residential Address',
'rules' => 'required'
],
],
];
Below i share form photo:

Answer 1

I got solution above my question.
Remove office_address and residential_address from config->form_validation.php
You can Validate office and residential address in controller, See below Code:
public function addMemberForm(){
$validation_error = array();
if(!$this->form_validation->run('add_form')){
$validation_error[] = $this->form_validation->set_error_delimiters('<span style="color:red">','</span>');
}
elseif($this->input->post('mailing') == 'office'){
$this->form_validation->set_rules('office_address','Office Address','required');
if($this->form_validation->run() == false){
$validation_error[] = $this->form_validation->set_error_delimiters('<span style="color:red">','</span>');
}
}
elseif($this->input->post('mailing') == 'residential'){
$this->form_validation->set_rules('resi_address','Residential Address','required');
if($this->form_validation->run() == false){
$validation_error[] = $this->form_validation->set_error_delimiters('<span style="color:red">','</span>');
}
}
if(count($validation_error)){
$this->load->view('admin_panel/add-member');
}
else{
$this->session->set_flashdata('add_member_msg','<span class="alert alert-success">Member insert successfully</span>');
return redirect('admin/add_member');
}
}