SMS API Webform PHP

Is there a way to configure Webform button to call PHP like 2FA, or Dispo Call URL? Use case sending one outbound SMS. Unsuccessfully tried pointing Webform at local php file URL with code from Twilio.
VICIDIAL astGUIclient discussion forum
http://www.vicidial.org/VICIDIALforum/
http://www.vicidial.org/VICIDIALforum/viewtopic.php?f=4&t=41631