diff --git a/appendices/predefined.xml b/appendices/predefined.xml
index 8a0c537ac6..75bb9035fc 100644
--- a/appendices/predefined.xml
+++ b/appendices/predefined.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.9 $ -->
+<!-- $Revision: 1.10 $ -->
 
 <!-- Note:  Please do not link or translate this file yet.
 This is only an initial update, quite a few more commits will
@@ -356,6 +356,36 @@ follow for this appendix. -->
         </simpara>
        </listitem>
       </varlistentry>
+
+      <varlistentry>
+       <term>'<varname>PHP_AUTH_USER</varname>'</term>
+       <listitem>
+        <simpara>
+         When running under Apache as module doing HTTP authentication this
+         variable is set to the username prodived by the user.
+        </simpara>
+       </listitem>
+      </varlistentry>
+
+      <varlistentry>
+       <term>'<varname>PHP_AUTH_PW</varname>'</term>
+       <listitem>
+        <simpara>
+         When running under Apache as module doing HTTP authentication this
+         variable is set to the password prodived by the user.
+        </simpara>
+       </listitem>
+      </varlistentry>
+
+      <varlistentry>
+       <term>'<varname>PHP_AUTH_TYPE</varname>'</term>
+       <listitem>
+        <simpara>
+         When running under Apache as module doing HTTP authenticated this
+         variable is set to the authentication type.
+        </simpara>
+       </listitem>
+      </varlistentry>
 	  
      </variablelist>
     </para>
diff --git a/appendices/reserved.xml b/appendices/reserved.xml
index 8034fc4544..58f4575d3b 100755
--- a/appendices/reserved.xml
+++ b/appendices/reserved.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.21 $ -->
+<!-- $Revision: 1.22 $ -->
 
  <appendix id="reserved">
   <title>List of Reserved Words</title>
@@ -555,6 +555,36 @@
        </listitem>
       </varlistentry>
 
+      <varlistentry>
+       <term>'<varname>PHP_AUTH_USER</varname>'</term>
+       <listitem>
+        <simpara>
+         When running under Apache as module doing HTTP authentication this
+         variable is set to the username prodived by the user.
+        </simpara>
+       </listitem>
+      </varlistentry>
+
+      <varlistentry>
+       <term>'<varname>PHP_AUTH_PW</varname>'</term>
+       <listitem>
+        <simpara>
+         When running under Apache as module doing HTTP authentication this
+         variable is set to the password prodived by the user.
+        </simpara>
+       </listitem>
+      </varlistentry>
+
+      <varlistentry>
+       <term>'<varname>PHP_AUTH_TYPE</varname>'</term>
+       <listitem>
+        <simpara>
+         When running under Apache as module doing HTTP authenticated this
+         variable is set to the authentication type.
+        </simpara>
+       </listitem>
+      </varlistentry>
+
      </variablelist>
     </para>
 
diff --git a/features/http-auth.xml b/features/http-auth.xml
index 6f8eb12c78..889a9b3e5a 100644
--- a/features/http-auth.xml
+++ b/features/http-auth.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.22 $ -->
+<!-- $Revision: 1.23 $ -->
  <chapter id="features.http-auth">
   <title>HTTP authentication with PHP</title>
 
@@ -25,14 +25,14 @@
     <programlisting role="php">
 <![CDATA[
 <?php
-  if (!isset($PHP_AUTH_USER)) {
+  if (!isset($_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 $PHP_AUTH_USER.</p>";
-    echo "<p>You entered $PHP_AUTH_PW as your password.</p>";
+    echo "<p>Hello {$_SERVER['PHP_AUTH_USER']}.</p>";
+    echo "<p>You entered {$_SERVER['$PHP_AUTH_PW']} as your password.</p>";
   }
 ?>
 ]]>
@@ -104,15 +104,15 @@
     exit;
   }
  
-  if (!isset($PHP_AUTH_USER) || ($SeenBefore == 1 && !strcmp($OldAuth, $PHP_AUTH_USER))) {
+  if (!isset($_SERVER['PHP_AUTH_USER']) || ($SeenBefore == 1 && $OldAuth == $_SERVER['$PHP_AUTH_USER']))) {
    authenticate();
   } 
   else {
-   echo "<p>Welcome: $PHP_AUTH_USER<br>";
-   echo "Old: $OldAuth";
-   echo "<form action='$PHP_SELF' METHOD='POST'>\n";
+   echo "<p>Welcome: {$_SERVER['$PHP_AUTH_USER']}<br>";
+   echo "Old: {$_REQUEST['$OldAuth']}";
+   echo "<form action='{$_SERVER['$PHP_SELF']}' METHOD='POST'>\n";
    echo "<input type='hidden' name='SeenBefore' value='1'>\n";
-   echo "<input type='hidden' name='OldAuth' value='$PHP_AUTH_USER'>\n";
+   echo "<input type='hidden' name='OldAuth' value='{$_SERVER['$PHP_AUTH_USER']}'>\n";
    echo "<input type='submit' value='Re Authenticate'>\n";
    echo "</form></p>\n";
   }