FreePBX Development tip.
It is almost always prefered to use internal functions and methods when interacting with FreePBX. This is made dificult when you don't know what those functions are. Reading the code can be tedious at times. Here is a flow to help you figure out internals.
Standard disclaimer and shameless plug.
This is provided as information only. This is a personal thing and is not supported by my employer. FreePBX is a trademark of Sangoma who also does not endorse or support this doc. While this is not an official project my employment does allow me to feed my family while giving back. Feel free to check out https://clearlyip.com . Buying from them feeds and shelters me and my offspring :)