[Freeswitch-users] PHP ESL

Hi everyone ! I'm not familiar with freeswitch, I'm a web developer, and my company uses this solution for VoIP calls. I read the cookbook to understand how it works. I have to develop a solution where we can see who calls who in a live interface, but I'm a little bit lost about how to get this information from PHP ESL. Any help to show me the way to go would be appreciated. Thank you. Emrah K.