From 24d3ffe4e4c94399eaab92335b6735784bc78dd0 Mon Sep 17 00:00:00 2001
From: Yasuo Ohgaki <yohgaki@php.net>
Date: Mon, 25 Mar 2002 01:29:56 +0000
Subject: [PATCH] Add ob_start() callback function limitations.

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@75123 c90b9560-bf6c-de11-be94-00142212c4b1
---
 functions/outcontrol.xml | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/functions/outcontrol.xml b/functions/outcontrol.xml
index 8d378f1bee..cd2a85e263 100644
--- a/functions/outcontrol.xml
+++ b/functions/outcontrol.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.26 $ -->
+<!-- $Revision: 1.27 $ -->
  <reference id="ref.outcontrol">
   <title>Output Control Functions</title>
   <titleabbrev>Output Control</titleabbrev>
@@ -152,6 +152,15 @@ ob_end_flush();
      functions are active, output is being filtered sequentially
      through each of them in nesting order.
     </para>
+    <para>
+     <function>ob_end_clean</function>,
+     <function>ob_end_flush</function>, <function>ob_clean</function>,
+     <function>ob_flush</function> and <function>ob_start</function>
+     may not be called from callback function. If you call them from
+     callback function, behavior is undefined. If you would like to
+     delete buffer contents, return "" (null string) from callback
+     function.
+    </para>
     <example>
      <title>User defined callback function example</title>
      <programlisting role="php">