From 9b53d281d7231a5a2bf6a089a0aacf004d635b25 Mon Sep 17 00:00:00 2001
From: Martin Kraemer <martin@php.net>
Date: Thu, 19 Oct 2000 09:23:47 +0000
Subject: [PATCH] Porting Aid for dealing with the problem that some PHP's have
 ImageGIF(), others have ImagePNG()

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@34111 c90b9560-bf6c-de11-be94-00142212c4b1
---
 functions/image.xml | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/functions/image.xml b/functions/image.xml
index 31d3366d0f..b25be6f548 100644
--- a/functions/image.xml
+++ b/functions/image.xml
@@ -1058,6 +1058,33 @@ function LoadPNG ($imgname) {
        <acronym>GD</acronym> library in version 1.6, this function is
        not available if you are using that version of the GD library.
       </para>
+      <para>
+       The following code snippet allows you to write more
+       portable PHP applications by auto-detecting the
+       type of GD support which is available. Replace
+       the sequence <literal>Header("Content-type: image/gif");
+       ImageGif($im);</literal> by the more flexible sequence:
+       <informalexample>
+        <programlisting role="php">
+&lt;?php
+  if(function_exists("imagegif")) {
+    Header("Content-type: image/gif");
+    ImageGif($im);
+  }
+  elseif(function_exists("imageJpeg")) {
+    Header("Content-type: image/jpeg");
+    ImageJpeg($im, "", 0.5);
+  }
+  elseif(function_exists("imagePng")) {
+    Header("Content-type: image/png");
+    ImagePng($im);
+  }
+  else
+    die("No image support in this PHP server");
+?&gt;
+        </programlisting>
+       </informalexample>
+      </para>
      </note>
     </para>
    </refsect1>