From 7164175020eb32a84e8c2e0221adf3a5d14a5c82 Mon Sep 17 00:00:00 2001
From: Etienne Kneuss <colder@php.net>
Date: Fri, 8 Feb 2008 22:17:25 +0000
Subject: [PATCH] Document special callbacks

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@252539 c90b9560-bf6c-de11-be94-00142212c4b1
---
 language/types.xml | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/language/types.xml b/language/types.xml
index 3b1bf9befb..be55f4a72d 100644
--- a/language/types.xml
+++ b/language/types.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.194 $ -->
+<!-- $Revision: 1.195 $ -->
  <chapter xml:id="language.types" xmlns="http://docbook.org/ns/docbook">
   <title>Types</title>
 
@@ -2382,7 +2382,8 @@ $var = NULL;
     </para>
     <para>
      A PHP function is simply passed by its name as a string. You can
-     pass any built-in or user defined function with the exception of 
+     pass any built-in or user defined function. Note that language 
+     constructs like  
      <function>array</function>, 
      <function>echo</function>, 
      <function>empty</function>, 
@@ -2390,8 +2391,8 @@ $var = NULL;
      <function>exit</function>, 
      <function>isset</function>, 
      <function>list</function>, 
-     <function>print</function> and 
-     <function>unset</function>.
+     <function>print</function> or
+     <function>unset</function> cannot be called using a callback.
     </para>
     <para>
      A method of an instantiated object is passed as an array containing
@@ -2443,6 +2444,20 @@ call_user_func(array($obj, 'myCallbackMethod'));
 // Type 4: Static class method call (As of PHP 5.2.3)
 call_user_func('MyClass::myCallbackMethod');
 
+// Type 5: Relative static class method call (As of PHP 5.3.0)
+class A {
+    public static function who() {
+        echo "A\n";
+    }
+}
+
+class B extends A {
+    public static function who() {
+        echo "B\n";
+    }
+}
+
+call_user_func(array('B', 'parent::who')); // A
 ?>
 ]]>
       </programlisting>