IP paging -PHP-call creation

Digium switchvox smb vers. 5.5.5 -asterisk based

What i am trying to accomplish is to create a call, that will ring an extension -that will ring all phones via intercom speaker with a nice melodic chime, reminding them to take their break. this needs to be automated -6 times per day.

I have to install php- where do i get all the necessary software from if iā€™m working with ubuntu 12.4.1 server? What else do I need? :unamused: