In CodeIgniter there is the possibility of creating validation rules ( rules ) for each form field, but what I need is a validation between two fields. I explain:
The form has a field called url which is only required if the corresponding flag is selected.
It is possible, but you will have to use the callback_XXX validators:
public function index(){
$this->form_validation->set_rules('flag', 'Flag', '');
$this->form_validation->set_rules('url', 'URL', 'callback_checaflag');
}
public function checaflag($url){
if($this->input->post('flag')){
return $this->form_validation->required('url');
}
}
Another alternative @LuisComS, would be to do something like:
public function index(){
// Se tal campo estiver marcado, adicionar a regra para validar a URL
if($this->input->post('eu_aceito')){
$this->form_validation->set_rules('url', 'URL', 'callback_validaurl');
}
}
public function validaurl($url){
// Colocar aqui funcao para vallidar $url e retornar TRUE ou FALSE
}