How to communitcate a web application to wowza streaming server in another location

Hi

Iam a php developer.And i am very new to wowza and media streaming techniques etc.

I have a custom chat in my website.Now i need to introduce audio/video streaming into the chat.

But i have no idea , where to start.

Let me know,

1)How can i communicate between my website & wowza installed server?

2)How can i display the video streaming in my site?

3) I installed the wowza server in my local machine (it is running on ubuntu).Also i checked the videochat tutorial and it was working ( https://www.wowza.com/forums/content.php?42-How-to-set-up-live-video-chat)

But don't getting any idea how to proceed,Is there any API like any third party payment (Paypal, Autorize.net..), so that i can use it from my site ?

Some one please give me advice how to proceed

thanks in advance