diff --git a/features/commandline.xml b/features/commandline.xml
index 707fb33976a7..4de9b010ba5f 100644
--- a/features/commandline.xml
+++ b/features/commandline.xml
@@ -1755,6 +1755,13 @@ php >
   <note>
    <simpara>This feature is not supported on Windows.</simpara>
   </note>
+  <note>
+   <simpara>
+    For information on PHP commandline usage and options, run
+    <command>php --help</command> or <command>man php</command>. Not all
+    options will apply when running the web server.
+   </simpara>
+  </note>
   <warning>
    <para>
     This <emphasis>experimental</emphasis> feature is <emphasis>not</emphasis>