Php 2 trigger a extension in extensions_custom.conf


Im trying to make a trigger from a php page to the Freepbx server. I would like to trigger a custom extension. I found some ways where you can talk from asterisk to the php file but not the other way around. The extension dials a number and plays a message to that person after that it will hangup.

Do you maby have a idea how to talk from php to the Freepbx server?

Thank you,