Its very daunting to go and edit sip.conf/ extensions.conf file for trial and learning basis.
so did anyone ever build something like a php file that could modify the extensions.conf or sip.conf file? or is there any shortcut way without getting ssh into the server and using vim/nano bla bla bla?
FreePBX does this, but it is not a general purpose dialplan editor, but rather edits it within very strict constraints and to implement a higher level abstraction.
The CLI can also be used to add or replace individual lines. I can’t remember if AMI can do the same.
You could arrange to access the file as a Windows share or via NFS.