diff --git a/functions/image.xml b/functions/image.xml
index b25be6f548..fa67136265 100644
--- a/functions/image.xml
+++ b/functions/image.xml
@@ -1067,15 +1067,15 @@ function LoadPNG ($imgname) {
        <informalexample>
         <programlisting role="php">
 &lt;?php
-  if(function_exists("imagegif")) {
+  if (function_exists("imagegif")) {
     Header("Content-type: image/gif");
     ImageGif($im);
   }
-  elseif(function_exists("imageJpeg")) {
+  elseif (function_exists("imagejpeg")) {
     Header("Content-type: image/jpeg");
     ImageJpeg($im, "", 0.5);
   }
-  elseif(function_exists("imagePng")) {
+  elseif (function_exists("imagepng")) {
     Header("Content-type: image/png");
     ImagePng($im);
   }
@@ -1086,6 +1086,27 @@ function LoadPNG ($imgname) {
        </informalexample>
       </para>
      </note>
+     <note>
+      <para>
+       In PHP4 as of version 4.0.2 you can use the function
+       <function>imagetypes</function> in place of
+       <function>function_exists</function> for checking
+       the presence of the various supported image formats:
+       <informalexample>
+        <programlisting role="php">
+if (ImageTypes() &amp; IMG_GIF) {
+    Header("Content-type: image/gif");
+    ImageGif($im);
+}
+elseif (ImageTypes() &amp; IMG_JPG) {
+... etc.</programlisting>
+       </informalexample>
+      </para>
+     </note>
+    </para>
+    <para>
+     See also <function>ImagePng</function>,
+     <function>ImageJpeg</function>, <function>ImageTypes</function>.
     </para>
    </refsect1>
   </refentry>
@@ -1122,6 +1143,10 @@ ImagePng($im);
       </programlisting>
      </informalexample>
     </para>
+    <para>
+     See also <function>ImageGif</function>,
+     <function>ImageJpeg</function>, <function>ImageTypes</function>.
+    </para>
    </refsect1>
   </refentry>
 
@@ -1164,6 +1189,10 @@ ImagePng($im);
       </para> 
      </note>
     </para>
+    <para>
+     See also <function>ImagePng</function>,
+     <function>ImageGif</function>, <function>ImageTypes</function>.
+    </para>
    </refsect1>
   </refentry>