Hi,
I am reading HTTP authentication in php manual. It
does not explain it from the basics of it. Can anyone
tell me what exactly will the output of the following
code? I thought it will ask some user name and
password thing but it just displays me the string 
"text to send if user hits cancel".
This is the code

<?php
    header("WWW-Authenticate: Basic realm=\"My
Realm\"");

  if (!isset($_SERVER['PHP_AUTH_USER'])) {
    header("WWW-Authenticate: Basic realm=\"My
Realm\"");
    header("HTTP/1.0 401 Unauthorized");
    echo "Text to send if user hits Cancel button\n";
    exit;
  } else {
    echo "<p>Hello {$_SERVER['PHP_AUTH_USER']}.</p>";
    echo "<p>You entered {$_SERVER['PHP_AUTH_PW']} as
your password.</p>";
  }
?>

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