Q:

How to call skype api in php

I have some phone numbers diplayed from database. When i click on that number i have to call that number using skype.I am using a php code. 
<a href="skype:echo123?call">Call the Skype Echo / Sound Test Service</a>

It works only if the system have skype installation.
If computer does not have skype i need a skype installation procedure.  Anyone help me.

A:

You have answered your own question.

It works only if the system have skype installation

That is how it works.
The Skype API need to be there inorder to make calls right ? 
If they don't have Skype, you can tell them to get it from the website like this
<a href="skype:echo123?call">Call the Skype Echo / Sound Test Service</a>, If you don't have Skype installed. Download it from <a href='http://www.skype.com'>here</a>

