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TOPIC: Calculate fields?

Calculate fields? 17 years 4 months ago #1462

  • gudge
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Is there any way to calculate a total of several fields?

I have one field which is a set price but people may select via a dropdown between 6 and 20 of the same item. I then need to be able to add a value from another field and display the total which is also submitted to the database.

So i guess the equation is for example:

(n x field1) + field2 = field3

Thanks again
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Re:Calculate fields? 17 years 4 months ago #1468

  • alex
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Hi Gudge,

create a hidden field. Call it field3.

Make sure that your quantity selectbox field id is \"n\" as you specified in your example.

Then, on Scripts called on form process, type this code:
if(isset($_POST['form']['field3'])){
$_POST['form']['field3'] = ($_POST['form']['field1'] * $_POST['form']['n']) + $_POST['form']['field2'];
}
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Re:Calculate fields? 17 years 2 months ago #2108

  • paradoes
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Hi, I'm new too and have the same problem. How can i get de result of field3 in my thank you email?

gr paradoes
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Re:Calculate fields? 17 years 1 month ago #2598

As I was having problems with this code, Alex helped me found a solution. You can read it on this thread:

www.rsjoomla.com/index.php/RSform-Script...ate-fields.html#2591

Regards,

Carlos
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