Chatting web application with php, mysql, w3.css

Hey guys today is a very good day of mine as i have completed my 2 Project based on php mysql and i am very happy so guys i have been releasing one of them today. It is a chatting we application with online and offline feature so that a user can chat with the friend who is online an as you know that i have released the Social network version 1 before this one, I have used the same feature in that too for showing that whether the person is online or offline and if the person is offline ,the last seen feature is also there.