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Document special callbacks

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@252539 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Etienne Kneuss 2008-02-08 22:17:25 +00:00
parent dabad796d9
commit 7164175020
1 changed files with 19 additions and 4 deletions
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23
language/types.xml
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@ -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>