Which Of The Following Variables Does Php Use To Authenticate A #202

Which of the following variables does PHP use to authenticate a user?</p> <pre><code class="language-php"> i) $_SERVER['PHP_AUTH_USER']. ii) $_SERVER['PHP_AUTH_USERS']. iii) $_SERVER['PHP_AUTH_PU']. iv) $_SERVER['PHP_AUTH_PW'].</code></pre>

This multiple choice question (MCQ) is related to the book/course gs gs107 PHP: Hypertext Preprocessor. It can also be found in gs gs107 PHP File and Session Handling - PHP User Authentication - Quiz No.1.

 i) $_SERVER['PHP_AUTH_USER']. ii) $_SERVER['PHP_AUTH_USERS']. iii) $_SERVER['PHP_AUTH_PU']. iv) $_SERVER['PHP_AUTH_PW'].