Combine 2 values

webmasterancilla 15 Feb, 2016
I need to combine the values from a text box and a check box (dollar amounts) and get the total into an Authorize.net action amount box. I understand that I need to write the values to the $form data array, but I'm a noob at php and I'm wondering if there's a tutorial.

When I asked Max about this before he said:
...you need to add the amount to the $form data array using a "Custom code" action before the "auth.net" action:
<?php
$form->data["amount_field"] = 99;
// or combine 2 fields values..etc
where "amount_field" is the field name used in the amount field name box in auth.net config[/quote]

I think my lack of understanding is about how to get the values into the $form data array in the first place.

Thanks,
Mike
GreyHead 16 Feb, 2016
Answer
Hi Mike,

ChronoForms does that for you - it's where the submitted data is saved. Add a Debugger action to your form ON Submit event to see exactly what is there. Adding two values will be something like this
<?php
$form->data['total'] = $form->data['input_a'] + $form->data['input_b'];
?>

Bob
cappleby 31 Aug, 2016
Hi Bob,

I get the addition pat but how can I fill the total field once it's calculated?
Also is it the field id or the filed name that needs to be used in the php code?

Thanks,

Chris A
GreyHead 31 Aug, 2016
Hi Chris,

I think that you are asking a different question.

The code here runs after the form has been submitted and calculates the total then, it can be shown in the email or Thank You message like any other form value.

I suspect that you want to do the calculation in the browser before the form submits then you have to do it using JavaScript.

The PHP code run after the form submits uses the *name* of the form element; JavaScript typically uses the *id* as that should be a unique identifier in the browser (you can have different input elements with the same name).

Bob
cappleby 01 Sep, 2016
Thanks for the clarification. Now I just need to work out the Javascript. Do you have any examples I could work from? I assume the js would go in the Extra Parameters box. Is that correct?
Chris A
GreyHead 01 Sep, 2016
Hi Chris,

The JavaScript goes in a Load JavaScript action in the Form On Load event.

There's an example in this post (you can ignore the first few lines as jQuery is loaded in current Joomla! versions.

Bob
cappleby 03 Sep, 2016
Hi Bob,

Thanks for that. I've now created a JS action at the start of the OnLoad event with the following code based on the example you gave me:
<?php
JHtml::_('jquery.framework');
?>

jQuery(Document).ready(function(jQ) {
    jQ('#subs').click(calc);
    jQ('#donation').click(calc);
  
      function calc() {
        var sum, sub, don;
        sub = jQ('input[name=subs]').val();
        don = jQ('#donation').val();
        sum = 0;
        sum = parseInt(sub) + parseInt(don);
       
         jQ('#total').val(sum);
        }
    });

I now get NaN appearing in the Total field.
Also the subs is a drop down field so I changed it to click rather than keyup. Is there an alternative to that for a drop down field?
My form is at https://secure.cbe.org.au/index.php?option=com_chronoforms5&chronoform=Membership

Chris A
GreyHead 04 Sep, 2016
Hi Chris,

sub = jQ('input[name=subs]').val();
this fails because the name of the drop-down is Subs (not subs)

Bob
cappleby 04 Sep, 2016
Hi Bob,

I've changed the name to Subs but it still puts NaN in the total box.

My code is now:
<?php
JHtml::_('jquery.framework');
?>

jQuery(Document).ready(function(jQ) {
    jQ('#subs').click(calc);
    jQ('#donation').click(calc);
  
      function calc() {
        var sum, sub, don;
        sub = jQ('input[name=Subs]').val();
        don = jQ('#donation').val();
        sum = 0;
        sum = parseInt(sub) + parseInt(don);
       
         jQ('#total').val(sum);
        }
    });
GreyHead 04 Sep, 2016
Hi Chris,

I see slightly different code with
sum = parseInt(Sub) + parseInt(don);
where that should be sub - you can see the JavaScript error on the page in your browser web developer tools. T

There is presumably some other error as well but I can't debug while that one breaks the JavaScript :-(

Bob

PS I strongly recommend that - if at all possible - you avoid taking credit card numbers on your site. Send the user to the gateway to pay (or use Stripe which allows you to check the cc using Ajax so that the number is never submitted).
cappleby 05 Sep, 2016
Hi Bob,
Sorry, one too many changes of case. I've now also changed all the ids and names to Upper case initials.
I'm changing from collecting CC numbers to using the Bank gateway but I need to find the total so I can send it to the bank Payway page.

My code is now corrected (and the error isn't there) to that below. Should the final line fill the Total field? at the moment it puts NaN in it, whatever that indicates.
<?php
JHtml::_('jquery.framework');
?>

jQuery(Document).ready(function(jQ) {
    jQ('#Subs').click(calc);
    jQ('#Donation').click(calc);
  
      function calc() {
        var sum, sub, don;
        sub = jQ('input[name=Subs]').val();
        don = jQ('#Donation').val();
        sum = 0;
        sum = parseInt(sub) + parseInt(don);
       
         jQ('#Total').val(sum);
        }
    });
GreyHead 05 Sep, 2016
Hi Chris,

Please try this version code]jQuery(Document).ready(function(jQ) {
jQ('#Subs').click(calc);
jQ('#Donation').click(calc);

function calc() {
var sum, sub, don;
sub = jQ('#Sub').val();
don = jQ('#Donation').val();
sum = parseInt(sub) + parseInt(don);
jQ('#Total').val(sum);
}
});[/code]That has a different selector for the Sub and removes the sum = 0 line that does nothing useful. This should work as long as the ParseInt works to give zero when the Donation is empty.

Please also remove the Please select=Please select option and add Please select to the Empty option box - otherwise the validation won't work correctly as Please select would be valid. Personally I'd probably use radio buttons here so that the options are visible without having to click the drop-down.

Bob
cappleby 06 Sep, 2016
Hi Bob,

I changed the Subs to radio buttons but no change.
I noticed Chrome showed this undefined error. I don't know if it'srelevant.
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MyCode is now:

<?php
JHtml::_('jquery.framework');
?>

jQuery(Document).ready(function(jQ) {
	jQ('#Subs').click(calc);
	jQ('#Donation').click(calc);

	function calc() {
	var sum, sub, don;
	sub = jQ('#Subs').val();
	don = jQ('#Donation').val();
	sum = parseInt(sub) + parseInt(don);
	jQ('#Total').val(sum);
}
});
cappleby 06 Sep, 2016
Hi Bob,

I changed the Subs to radio buttons but no change.
I noticed Chrome showed this undefined error. I don't know if it's relevant.
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MyCode is now:

<?php
JHtml::_('jquery.framework');
?>

jQuery(Document).ready(function(jQ) {
	jQ('#Subs').click(calc);
	jQ('#Donation').click(calc);

	function calc() {
	var sum, sub, don;
	sub = jQ('#Subs').val();
	don = jQ('#Donation').val();
	sum = parseInt(sub) + parseInt(don);
	jQ('#Total').val(sum);
}
});
cappleby 10 Sep, 2016
Hi ob,

I finally go the code to work but now I get a data array error when I click submit - instead of the thank you message. Would this be due to the JScript?
My code is now:

<?php
JHtml::_('jquery.framework');
?>

jQuery(document).ready(function(jQ) {
        jQ('#Total').click(calc);

	function calc() {
	var sum, sum1, sum2, sub, don;
    sub = 0;
    don = 0;
    sum = 0;
    sub = jQ('input[name=Subs]:checked').val();
	don = jQ('#Donation').val();
	sum1 = parseInt(sub);	
	sum2 = parseInt(don);
        sum = (sum1 + sum2);
	jQ('#Total').val(sum);
}
});
GreyHead 14 Sep, 2016
Hi Chris,

It looks as though you have a Debugger action enabled in the form On Submit event. Please check and disable it if you have.

Bob
cappleby 14 Sep, 2016
Thanks Bob,

That solved it.

Chris A
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