Clarify order of operations - some variables aren't accessible to If.

See bz 53349 for context.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1673536 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/manual/mod/core.xml b/docs/manual/mod/core.xml
index 07195f24a65e491d563a554667a8ae1f9c838327..fc9076e3256d743a86bbe24a748941ac207de43f 100644 (file)
--- a/docs/manual/mod/core.xml
+++ b/docs/manual/mod/core.xml
@@ -1918,6 +1918,13 @@ satisfied by a request at runtime</description>
     <p>Only directives that support the <a href="directive-dict.html#Context"
     >directory context</a> can be used within this configuration section.</p>
 
+    <note type="warning">
+    Certain variables, such as <code>CONTENT_TYPE</code> and other
+    response headers, are set after &lt;If&gt; conditions have already
+    been evaluated, and so will not be available to use in this
+    directive.
+    </note>
+
 </usage>
 
 <seealso><a href="../expr.html">Expressions in Apache HTTP Server</a>,