Index: imagegif.xml
===================================================================
RCS file: /repository/phpdoc/en/reference/image/functions/imagegif.xml,v
retrieving revision 1.11
diff -u -r1.11 imagegif.xml
--- imagegif.xml	2 Dec 2005 09:30:45 -0000	1.11
+++ imagegif.xml	25 Aug 2006 17:24:13 -0000
@@ -27,10 +27,11 @@
      image format will be <acronym>GIF89a</acronym>.
     </para>
     <para>
-     The filename argument is optional, and if left off, the raw image
-     stream will be output directly.  By sending an image/gif
-     content-type using <function>header</function>, you can create a
-     PHP script that outputs <acronym>GIF</acronym> images directly.
+     The filename argument is optional, and if left off or filled 
+     with a &null; value, the raw image stream will be output directly.
+     By sending an image/gif content-type using <function>header</function>,
+     you can create a PHP script that outputs <acronym>GIF</acronym> 
+     images directly.
      <note>
       <para>
        Since all <acronym>GIF</acronym> support was removed from the
Index: imagepng.xml
===================================================================
RCS file: /repository/phpdoc/en/reference/image/functions/imagepng.xml,v
retrieving revision 1.5
diff -u -r1.5 imagepng.xml
--- imagepng.xml	21 Jun 2004 11:45:37 -0000	1.5
+++ imagepng.xml	25 Aug 2006 17:24:13 -0000
@@ -14,10 +14,15 @@
       <methodparam choice="opt"><type>string</type><parameter>filename</parameter></methodparam>
      </methodsynopsis>
     <para>
-     The <function>imagepng</function> outputs a GD image stream
-     (<parameter>image</parameter>) in PNG format to standard output
-     (usually the browser) or, if a filename is given by the
-     <parameter>filename</parameter> it outputs the image to the file.
+     <function>imagepng</function> creates the <acronym>PNG</acronym>
+     file in filename from the image <parameter>image</parameter>. The
+     <parameter>image</parameter> argument is the return from the
+     <function>imagecreate</function> or <literal>imagecreatefrom*</literal>
+     function.
+    </para>
+    <para>
+     The filename argument is optional, and if left off or filled 
+     with a &null; value, the raw image stream will be output directly.
      <informalexample>
       <programlisting role="php">
 <![CDATA[
Index: imagewbmp.xml
===================================================================
RCS file: /repository/phpdoc/en/reference/image/functions/imagewbmp.xml,v
retrieving revision 1.5
diff -u -r1.5 imagewbmp.xml
--- imagewbmp.xml	10 Aug 2005 04:48:11 -0000	1.5
+++ imagewbmp.xml	25 Aug 2006 17:24:14 -0000
@@ -21,8 +21,8 @@
      is the return from the <function>imagecreatetruecolor</function> function.
     </para>
     <para>
-     The filename argument is optional, and if left off, the raw image
-     stream will be output directly.
+     The filename argument is optional, and if left off or filled with a
+     &null; value, the raw image stream will be output directly.
      By sending an <acronym>image/vnd.wap.wbmp</acronym> content-type
      using <function>header</function>, you can create
      a PHP script that outputs WBMP images directly.