CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

I have a app that send messages for Twitter. I'm writing a "view settings" and I'd like to know if the user already autorized my app on Twitter. I have the fields "username" and "password", how can I check if the user already authorized? I'm using ShareKit.

I am a new PHP learner. I need a status box which just like twitter status box. I have tried many websites and i can not find the exact solution. What i exactly need is 1. Status box like twitter, when typing on the box it will increase its size automatically 2.If there is URL in the status, it should automatically highlight URL like twitter 3.After 500 characters user should not allowed to type in. I don't want to use any API. I think the code might be combination of HTML,ajax and javascript. Please someone help me. I am new in this area. So if it is possible give a little explanation of your code. I found a bit similar question in this website but the answer is not given there.