From 1cc1b6cb9671633213463c81bc6014e401ae7ffc Mon Sep 17 00:00:00 2001
From: Louis-Arnaud Catoire <la.catoire@gmail.com>
Date: Mon, 2 Feb 2026 09:21:30 +0100
Subject: [PATCH] Remove incorrect warning about FILTER_CALLBACK flags

The documentation incorrectly stated that FILTER_CALLBACK cannot be used
with filter flags like FILTER_NULL_ON_FAILURE. In practice, these flags
do affect the behavior of FILTER_CALLBACK.

Fixes #2708
---
 reference/filter/constants.xml | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/reference/filter/constants.xml b/reference/filter/constants.xml
index 2ff05f6bd932..35864c8f6cf9 100644
--- a/reference/filter/constants.xml
+++ b/reference/filter/constants.xml
@@ -1215,12 +1215,6 @@ NULL
 ]]>
      </screen>
     </example>
-    <warning>
-     <simpara>
-      This filter cannot be used with any other filter flags, e.g.
-      <constant>FILTER_NULL_ON_FAILURE</constant>.
-     </simpara>
-    </warning>
    </listitem>
   </varlistentry>
  </variablelist>