Limit date range

I've seen lots of people asking about how to limit the date field to only allow certain dates (for example not being about to select dates in the past).

You (the support staff) always point the toward the jquery datepicker.

After a bit of work, I did manage to get the datepicker to limit certain dates, but this doesn't actually limit the dates that are submitted to the form. In this example, a user can simply key in a different date without using the datepicker graphic interface. This allows them to get past the limitation.

I bet this can be fixed with some custom php, but my bigger point is that you shouldn't be telling people that this can be achieved with datepicker alone.

Unless I'm missing something... And I HOPE I'm missing something because I don't want to have to deal with this another way...

So, am I missing something?

That link is an excellent walk-through that I had not yet read.

Thanks.

Hey I've been reading through the gform_validation_hook tutorial repeatedly and I just can't seem to make the connection from the example given to the goal that I have in mind.

I basically want to create a birth date validator that would suspend the registration process if the supplied birthday doesn't add up to the age of 21 (on December 8, 2011).

Here's the link to my form: http://motormediausa.com/test/

And here's my code:

// CUSTOM AGE VERIFICATION
add_filter( 'gform_validation_1', 'age_validation');
function age_validation($validation_result){

	$form = $validation_result['form'];
	foreach($form['fields'] as &$field){
		// 5 - If the field does not have our designated CSS class, skip it
        if(strpos($field['cssClass'], 'validate-age') === false)
            continue;

			// 7 - Check if the field is hidden by GF conditional logic
			$is_hidden = RGFormsModel::is_field_hidden($form, $field, array());

			// 8 - If the field is not on the current page OR if the field is hidden, skip it
			if($field_page != $current_page || $is_hidden)
			continue;

			// 9 - Get the submitted value from the $_POST
			$field_value = rgpost("input_{$field['id']}");

			// 10 - Make a call to your validation function to validate the value
			$is_valid = is_age($field_value);

			// 11 - If the field is valid we don't need to do anything, skip it
			if($is_valid)
				continue;

			// 12 - The field field validation, so first we'll need to fail the validation for the entire form
			$validation_result['is_valid'] = false;

			// 13 - Next we'll mark the specific field that failed and add a custom validation message
			$field['failed_validation'] = true;
			$field['validation_message'] = 'The birthday you have entered indicates that you are not of legal drinking age and will be ineligible to compete in this tournament.';

    }

	// 14 - Assign our modified $form object back to the validation result
    $validation_result['form'] = $form;

    // 15 - Return the validation result
    return $validation_result;
}

function is_age($age) {
		$day = ("#input_1_3_2");
		$month = ("#input_1_3_1");
		$year = ("#input_1_3_3");
		$age = 21;

	$mydate=new Date();
	mydate.setFullYear(1990,11-1,8);

	$currdate = new Date();
	currdate.setFullYear(currdate.getFullYear() - age);
	if ((currdate - mydate) < 0){
	alert("Sorry, only persons over the age of " + age + " may enter this competition.");
	return false;
	}
	return true;
	};

Any help that you could provide would be excellent. Thank you.

Hey! Thank you for the quick response. When I click the submit button, I get a

Fatal error: Class 'Date' not found in /home/content/i/n/d/indiangig/html/wp-content/themes/motormediausa/functions.php on line 375

As I said, I've been trying to make the connection between the VIN# validation script and what I'm attempting to do here and just getting nowhere with it.

Has There been a solution to this thread? We are trying the same thing over here.

Thank you in advance.

+1.
I'm trying to do a similar thing (I have date fields that I want to check against the current date to check if the user is of legal age). I scoured the forums and the docs, but cannot find the proper way to reference multiple subfields. Before I get sent to the validation hooks tutorial, all that is stated there is that "we will discuss multiple inputs at a future time".

Can you *please* let us know how to do this? I've tried variations on the is_age function above with no success.