I have created a webform, whose id is
webform_client_form_1, I have 3 fields:
Now I want to extend webform submit function to send SMS to that
Phone number. I have a working PHP script which sends SMS, using 3rd party service.
So my question is how to extend the submit function for webform? Is there any hook available or there is other method to do it?
Submit function for webform is: