codeigniter/Pyro: making sure one of three fields is valid

I have three phone fields (work_phone, home_phone and cell_phone). I would like to make sure that the user fills out at least one of them. This is my validation so far.

array(
    'field' => 'work_phone',
    'label' => 'lang:employee.work_phone',
    'rules' => 'max_length[10]|numeric|callback_check_phones[work_phone]'
    ),
array(
    'field' => 'home_phone',
    'label' => 'lang:employee.home_phone',
    'rules' => 'max_length[10]|numeric|callback_check_phones[home_phone]'
    ),
array(
    'field' => 'cell_phone',
    'label' => 'lang:employee.cell_phone',
    'rules' => 'max_length[10]|numeric|callback_check_phones[cell_phone]'
    ),

开发者_如何学编程function check_phones($value,$name) {
    if((!isset($_POST[$name]))) {
        $this->form_validation->set_message('check_phones', 
            'You must enter at least one phone number');
        return FALSE;
    }
    else
    {
        return TRUE;
    }
}

The problem is that it makes ALL the phone fields required. If I try if((!isset($_POST[work_phone])) ||(!isset($_POST[home_phone])) ){ no error is returned. What's the best way to check if one of the three fields is not null?

EDIT I got this to work by using empty() instead of isset() and && instead of || I know have

function check_phones($value){
    if((empty($_POST['work_phone'])) && (empty($_POST['home_phone'])) && (empty($_POST['cell_phone']))){
        $this->form_validation->set_message('check_phones', 'You must enter at least one phone number');
        return FALSE;
    }
    else
    {
        return TRUE;
    }

}

Which works but returns the error three times

just change your !isset statements to isset:

if(isset($_POST['phone1') || isset($_POST['phone2']) || isset($_POST['phone3'])){
   //at least 1 is filled.
}else{
   //fail
}

how about using the CI input class... $this->input->post will return a false if its empty

if($this->input->post('work_phone') || $this->input->post('home_phone') || $this->input->post('cell_phone'))
    {
        echo "We have your phone!";
    }
    else
    {
        echo "Please enter at least one!";
    }

Update for CI's validation...

If they haven't filled in any phone field, you could just add validation for the first one. Like so...

if($_SERVER['REQUEST_METHOD'] == "POST")
{
    if($this->input->post('work_phone') || $this->input->post('home_phone') || $this->input->post('cell_phone'))
    {
        echo "At least one is in there";
    }
    else
    {
        $this->form_validation->set_rules('work_phone', '1 Phone', 'required');
//      echo "Please enter at least one!";
    }
}

The answer is to use empty() instead of isset() see above.