i have mac book pro, it was working fine with my wi fi but today i found it does not show wi fi indication "on" so no internet working. please suggest me the solution.

I have mac book pro. It was working fine on my wi fi but today it doesn't show wi fi indication and my wi fi link is not mentioned in the list. but it shows other links which are not mine.

I reset my wi fi but no any result. but at the sametime my iphone is working alright on the same wi fi that means wi fi is ok. Please guide me !!!