Which of the following variables does PHP use to authenticate a user? i) $_SERVER[‘PHP_AUTH_USER’]. ii) $_SERVER[‘PHP_AUTH_USERS’]. iii) $_SERVER[‘PHP_AUTH_PU’]. iv) $_SERVER[‘PHP_AUTH_PW’].

Which of the following variables does PHP use to authenticate a user?

1.	Which of the following variables does PHP use to authenticate a user? i) $_SERVER[‘PHP_AUTH_USER’]. ii) $_SERVER[‘PHP_AUTH_USERS’]. iii) $_SERVER[‘PHP_AUTH_PU’]. iv) $_SERVER[‘PHP_AUTH_PW’].
A.	i) and ii)
B.	ii) and iv)
C.	i) and iv)
D.	ii) and iii)
Answer» D. ii) and iii)