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'].

Question: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'].

1. ii) and iv)

2. i) and iv)

3.ii) and iii)

4.i) and ii)


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