How to trigger a PHP code and return a listbox option, and populate it into a CONTROL app’s field?
I don’t know what you mean actually. If you need to populate a listbox then you just create a field with a lookup definition to it. If you need to trigger the lookup after changing another lookup (ie select country and then populate all cities) then you can define an ajax refresh, not in the events section, but on the first pulldown field, scroll down and you will find the additional ajax setting.
I need to populate my list box with all physical files stored in /tmp