Guys $_SEREVER[ ]? what is this variable stands for?

Question

i knwo it gives us info about server,ip adress,browser,version etc etc..is there's any good,easy,simple and with example study material avaible on internet about this? paste the url please.. thank u :)

Answer 1

http://php.net/manual/en/reserved.variables.server.php

Answer 2

its a global variable to store data and access in global level