PHP: DOMDocument->registerNodeClass() - Manual
DOMDocument->normalizeDocument()DOMDocument->registerNodeClass()
(PHP 5 >= 5.2.0)
DOMDocument->registerNodeClass() — Register extended class used to create base node type
说明
This method allows you to register your own extended DOM class to be used afterward by the PHP DOM extension.
This method is not part of the DOM standard.
参数
- baseclass
-
The DOM class that you want to extend. You can find a list of these classes in the chapter introduction.
Of course, you won't be able to register a class extending DOMDocument but you can always start your document by instanciating your own extending class.
- extendedclass
-
Your extended class name. If NULL is provided, any previously registered class extending baseclass will be removed.
返回值
如果成功则返回 TRUE ，失败则返回 FALSE 。
更新日志
| 版本 | 说明 |
|---|---|
| PHP 5.2.2 | Prior to 5.2.2, a previously registered extendedclass had to be unregistered before being able to register a new class extending the same baseclass . |
范例
Example#1 Adding a new method to DOMElement to ease our code
<?php
class myElement extends DOMElement {
function appendElement ( $name ) {
return $this -> appendChild (new myElement ( $name ));
}
}
class myDocument extends DOMDocument {
function setRoot ( $name ) {
return $this -> appendChild (new myElement ( $name ));
}
}
$doc = new myDocument ();
$doc -> registerNodeClass ( 'DOMElement' , 'myElement' );
// From now on, adding an element to another costs only one method call !
$root = $doc -> setRoot ( 'root' );
$child = $root -> appendElement ( 'child' );
$child -> setAttribute ( 'foo' , 'bar' );
echo $doc -> saveXML ();
?> 上例将输出：
<?xml version="1.0"?> <root><child foo="bar"/></root>
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