Skype Integration and Unique Id Generation in PHP

Dear Sir/Madam

 

         I am designing a website in php using back end Wamp server.i want to display a unique id to the user with the combination of Alphanumeric and

also i want integrate the skype to my project.how to i do it..Please send me some material related above.i am waiting for your positive Response.

 

 

                                                                                                   Thank you...