In my form, I have a start time and end time. I would like to have a dynamically calculated field that contains the length of time from start time to end time.
I can't seem to find anything like this already in the forums or documentation, and the calculation field seems to exclude the time fields.
Does the length of time need to be available in the form before submission for a calculation, or does it just need to be stored with the entry?
Just stored with the entry so it's available in the results/export.
To do that, you'll need to do some PHP coding.
Create a field called length.
Check off it being allowed to be populated dynamically
Give it a CSS class of hidden
In your style.css add:
.hidden { display: none; }In your functions.php file you will want to use the following hook:
http://www.gravityhelp.com/documentation/page/Gform_pre_submission
And then look at the following information:
http://php.net/manual/en/function.date.php
At the end, you should have an invisible form field that upon submission of the form gets the value of the difference between the two dates.
Couldn't get back to this for a bit, but if anyone else is interested, here's the code I through together successfully....
Beautiful code. Good job.