// Set these to your preferences. 
   // For heaven's sake pick a good password!
   $wikiadmin   = "user";
   $adminpasswd = "pass";

......
......

   // From the manual, Chapter 16
   if (($PHP_AUTH_USER != $wikiadmin  )  ||
       ($PHP_AUTH_PW   != $adminpasswd)) {
      Header("WWW-Authenticate: Basic realm=\"PhpWiki\"");
      Header("HTTP/1.0 401 Unauthorized");
      echo gettext("You entered an invalid login or password.");
      exit;
   }