PHP手册 - 预定义类

预定义类

本节列出标准的预定义类。各种扩展库定义了其它类，其说明在各自的参考文档中。

标准类

这些类由一些内建在 PHP 中的标准函数定义。

Directory: 由dir()创建.
stdClass
__PHP_Incomplete_Class

自 PHP 5 起预定义的类

这些额外的预定义类是 PHP 5.0.0 引进的。

exception
php_user_filter

Closure

PHP5.3.0中引入了一个预定义的final类Closure，它可以用于实现匿名函数

该类的构造方法禁止手工创建该类的对象（会导致一个E_RECOVERABLE_ERROR错误）。该类也有一个__invoke 方法来进行魔术调用。

特殊的类

以下标记符不可以作为类名，因为它们有着特殊的用途。

self
parent

PHP手册 - N: 预定义类

用户评论:

spark at limao dot com dot br (15-Aug-2011 10:21)

if you want a Dynamic class you can extend from, add atributes AND methods on the fly you can use this: <?php class Dynamic extends stdClass{ public function __call($key,$params){ if(!isset($this->{$key})) throw new Exception("Call to undefined method ".get_class($this)."::".$key."()"); $subject = $this->{$key}; call_user_func_array($subject,$params); } } ?> this will accept both arrays, strings and Closures: <?php $dynamic->myMethod = "thatFunction"; $dynamic->hisMethod = array($instance,"aMethod"); $dynamic->newMethod = array(SomeClass,"staticMethod"); $dynamic->anotherMethod = function(){ echo "Hey there"; }; ?> then call them away =D

Typer85 at gmail dot com (17-Feb-2007 04:58)

In response to the note below mine, This list is not incomplete. Read the Manual folks, its listed there plain and simple: "This section lists standard predefined classes. Miscellaneous extensions define other classes which are described in their reference." Depending on what extensions you have, they might define their own classes. This list is just the standard classes as defined by PHP with no regards to extensions.

Simon Kissane (14-Sep-2004 08:54)

The above list is incomplete. For example, on my PHP 5.0 configuration (yours may differ depending on the extensions you choose to install), the following classes are predefined: == "Core" == stdClass Exception __PHP_Incomplete_Class php_user_filter Directory == Reflection API == ReflectionException Reflection ReflectionFunction ReflectionParameter ReflectionMethod ReflectionClass ReflectionObject ReflectionProperty ReflectionExtension == SQLLite == SQLiteDatabase SQLiteResult SQLiteUnbuffered SQLiteException == Standard PHP Lib. == RecursiveIteratorIterator FilterIterator ParentIterator LimitIterator CachingIterator CachingRecursiveIterator ArrayObject ArrayIterator DirectoryIterator RecursiveDirectoryIterator == SimpleXML == SimpleXMLElement SimpleXMLIterator == DOM/XSL/XPath extensions == DOMException DOMStringList DOMNameList DOMImplementationList DOMImplementationSource DOMImplementation DOMNode DOMNameSpaceNode DOMDocumentFragment DOMDocument DOMNodeList DOMNamedNodeMap DOMCharacterData DOMAttr DOMElement DOMText DOMComment DOMTypeinfo DOMUserDataHandler DOMDomError DOMErrorHandler DOMLocator DOMConfiguration DOMCdataSection DOMDocumentType DOMNotation DOMEntity DOMEntityReference DOMProcessingInstruction DOMStringExtend DOMXPath XSLTProcessor

unknown (23-Jul-2002 06:29)

It's handy to have a array of the reserved classes..... var_dump (get_declared_classes ());