Custom validation help needed

Hi,

I need to apply an ABN (Australian Business Number) validation formula to 3 fields in my form, and am having trouble getting it to function.

I have applied this validation code - http://www.clearwater.com.au/code - to hook samples and this is what I have come up with:

<?php

// Application form ABN validation

add_filter('gform_validation_2', 'custom_validation');
function custom_validation($validation_result){

function ValidateABN($abn)
{
    $weight = array(10, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19);
    $form = $validation_result["form"];

	foreach($form['fields'] as &$field){

        // ABN field ID
        if($field['id'] = input_2_16||input_2_26||input_2_49)
            continue;

    // strip anything other than digits
    $abn = preg_replace("/[^\d]/","",$abn);

    // check length is 11 digits
    if (strlen($abn)!=11) {
        // ABN is not valid - must have 11 digits
        return false;
    }

    // apply ato check method 

    $sum = 0;
    for ($i=0;$i<11;$i++) {
        $digit = $abn[$i] - ($i ? 0 : 1);
        $sum += $weight[$i] * $digit;
    }
    return ($sum % 89)==0;

   $field['failed_validation'] = true;
   $field['validation_message'] = 'The ABN you have entered is not valid.';

   $validation_result['is_valid'] = false;
   $validation_result['form'] = $form;

   break;
}

    // we end by returning the validation result
    return $validation_result;
}
}

?>

where the form ID is 2 and the fields to be validated are input_2_16, input_2_26 and input_2_49.

Filling in a wrong number is not setting off an error message.

Help with this would be greatly appreciated.

Hi David,

Thank you so much for your time.

On a single page form with no conditional logic it does works in so much as displaying this message:
"There was a problem with your submission. Errors have been highlighted below".
But there is no field specific error message.

Also, if the field is not visible - that is, on another page of a multi-page form, or hidden due to conditional logic, the above error message appears - because nothing has been entered in the field.

Would it be possible to work around these issues?

Thanks again.
CW

Hi David,

The multi-page and non-visible fixes are working - thank you!

I am still not getting an error message, though. The form isn't unusual in any way except I have added two column css classes to some fields (not the ABN one).

I tested the field as Required - the standard "This field is required" message appears if the field is empty. But if I add less than 11 digits, or a wrong number, the same thing happens. The error message appears at the top of the page, but no error message on the field.

I tested it without Required checked, too. No success.

I have copied and pasted your code without editing. And applied the validate-abn css class to the field. There is no error if the number is correct, too, btw. So that is working.

I'm stumped at what to look at next.

The form's website is currently password protected during development. Otherwise I could post the URL here.

OK. Carl. I have sent the access info via the Priority Support form.

Thanks,
Carolyn