The DOMNode class

(PHP 5)

类摘要

DOMNode {

/* 属性 */

public readonly string $nodeName ;

public string $nodeValue ;

public readonly int $nodeType ;

public readonly DOMNode $parentNode ;

public readonly DOMNodeList $childNodes ;

public readonly DOMNode $firstChild ;

public readonly DOMNode $lastChild ;

public readonly DOMNode $previousSibling ;

public readonly DOMNode $nextSibling ;

public readonly DOMNamedNodeMap $attributes ;

public readonly DOMDocument $ownerDocument ;

public readonly string $namespaceURI ;

public string $prefix ;

public readonly string $localName ;

public readonly string $baseURI ;

public string $textContent ;

/* 方法 */

public DOMNode appendChild ( DOMNode $newnode )

public string C14N ([ bool $exclusive [, bool $with_comments [, array $xpath [, array $ns_prefixes ]]]] )

public int C14NFile ( string $uri [, bool $exclusive [, bool $with_comments [, array $xpath [, array $ns_prefixes ]]]] )

public DOMNode cloneNode ([ bool $deep ] )

public int getLineNo ( void )

public string getNodePath ( void )

public bool hasAttributes ( void )

public bool hasChildNodes ( void )

public DOMNode insertBefore ( DOMNode $newnode [, DOMNode $refnode ] )

public bool isDefaultNamespace ( string $namespaceURI )

public bool isSameNode ( DOMNode $node )

public bool isSupported ( string $feature , string $version )

public string lookupNamespaceURI ( string $prefix )

public string lookupPrefix ( string $namespaceURI )

public void normalize ( void )

public DOMNode removeChild ( DOMNode $oldnode )

public DOMNode replaceChild ( DOMNode $newnode , DOMNode $oldnode )

}

属性

nodeName: Returns the most accurate name for the current node type
nodeValue: The value of this node, depending on its type
nodeType: Gets the type of the node. One of the predefined XML_xxx_NODE constants
parentNode: The parent of this node
childNodes: A DOMNodeList that contains all children of this node. If there are no children, this is an empty DOMNodeList.
firstChild: The first child of this node. If there is no such node, this returns NULL.
lastChild: The last child of this node. If there is no such node, this returns NULL.
previousSibling: The node immediately preceding this node. If there is no such node, this returns NULL.
nextSibling: The node immediately following this node. If there is no such node, this returns NULL.
attributes: A DOMNamedNodeMap containing the attributes of this node (if it is a DOMElement) or NULL otherwise.
ownerDocument: The DOMDocument object associated with this node.
namespaceURI: The namespace URI of this node, or NULL if it is unspecified.
prefix: The namespace prefix of this node, or NULL if it is unspecified.
localName: Returns the local part of the qualified name of this node.
baseURI: The absolute base URI of this node or NULL if the implementation wasn't able to obtain an absolute URI.
textContent: This attribute returns the text content of this node and its descendants.

注释

Note:
The DOM extension uses UTF-8 encoding. Use utf8_encode() and utf8_decode() to work with texts in ISO-8859-1 encoding or Iconv for other encodings.

参见

» W3C specification of Node

DOMNode::appendChild — Adds new child at the end of the children
DOMNode::C14N — Canonicalize nodes to a string
DOMNode::C14NFile — Canonicalize nodes to a file
DOMNode::cloneNode — Clones a node
DOMNode::getLineNo — Get line number for a node
DOMNode::getNodePath — Get an XPath for a node
DOMNode::hasAttributes — Checks if node has attributes
DOMNode::hasChildNodes — Checks if node has children
DOMNode::insertBefore — Adds a new child before a reference node
DOMNode::isDefaultNamespace — Checks if the specified namespaceURI is the default namespace or not
DOMNode::isSameNode — Indicates if two nodes are the same node
DOMNode::isSupported — Checks if feature is supported for specified version
DOMNode::lookupNamespaceURI — Gets the namespace URI of the node based on the prefix
DOMNode::lookupPrefix — Gets the namespace prefix of the node based on the namespace URI
DOMNode::normalize — Normalizes the node
DOMNode::removeChild — Removes child from list of children
DOMNode::replaceChild — Replaces a child

PHP手册 - N: The DOMNode class

用户评论:

alastair dot dallas at gmail dot com (25-Sep-2011 04:44)

The issues around mixed content took me some experimentation to remember, so I thought I'd add this note to save others time. When your markup is something like: <div>First text.<ul><li>First bullet</li></ul></div>, you'll get XML_ELEMENT_NODEs that are quite regular. The <div> has children and <ul> and the nodeValue for both s yields the text you expect. But when your markup is more like This is bold and this is italic., you realize that the nodeValue for XML_ELEMENT_NODEs is not reliable. In this case, you need to look at the 's child nodes. For this example, the has children: #text, , #text, , #text. In this example, the nodeValue of and is the same as their #text children. But you could have markup like: This is bold and bold italic, you see?. In this case, you need to look at the children of , which will be #text, , because the nodeValue of will not be sufficient. XML_TEXT_NODEs have no children and are always named '#text'. Depending on how whitespace is handled, your tree may have "empty" #text nodes as children of <body> and elsewhere. Attributes are nodes, but I had forgotten that they are not in the tree expressed by childNodes. Walking the full tree using childNodes will not visit any attribute nodes.

mjpelmear at gmail dot com (03-Jun-2011 09:33)

getAttribute() returns an empty string if the requested attribute doesn't exist in the node.

stilgar at gilevski dot fakepart dot name (21-May-2011 09:17)

If you have empty $node->textContent and $node->textValue, check if document that is loaded have UTF-8 encoding.

imranomar at gmail dot com (20-Mar-2011 02:10)

Just discovered that node->nodeValue strips out all the tags

I. Cook (19-Apr-2010 10:43)

For a reference with more information about the XML DOM node types, see http://www.w3schools.com/dom/dom_nodetype.asp (When using PHP DOMNode, these constants need to be prefaced with "XML_")

R. Studer (13-Jan-2010 05:03)

For clarification: The assumingly 'discoverd' by previous posters and seemingly undocumented methods (.getElementsByTagName and .getAttribute) on this class (DOMNode) are in fact methods of the class DOMElement, which inherits from DOMNode. See: http://www.php.net/manual/en/class.domelement.php

David Rekowski (08-Jan-2010 09:54)

You cannot simply overwrite $textContent, to replace the text content of a DOMNode, as the missing readonly flag suggests. Instead you have to do something like this: <?php $node->removeChild($node->firstChild); $node->appendChild(new DOMText('new text content')); ?> This example shows what happens: <?php $doc = DOMDocument::loadXML('<node>old content</node>'); $node = $doc->getElementsByTagName('node')->item(0); echo "Content 1: ".$node->textContent."\n"; $node->textContent = 'new content'; echo "Content 2: ".$node->textContent."\n"; $newText = new DOMText('new content'); $node->appendChild($newText); echo "Content 3: ".$node->textContent."\n"; $node->removeChild($node->firstChild); $node->appendChild($newText); echo "Content 4: ".$node->textContent."\n"; ?> The output is: Content 1: old content // starting content Content 2: old content // trying to replace overwriting $node->textContent Content 3: old contentnew content // simply appending the new text node Content 4: new content // removing firstchild before appending the new text node If you want to have a CDATA section, use this: <?php $doc = DOMDocument::loadXML('<node>old content</node>'); $node = $doc->getElementsByTagName('node')->item(0); $node->removeChild($node->firstChild); $newText = $doc->createCDATASection('new cdata content'); $node->appendChild($newText); echo "Content withCDATA: ".$doc->saveXML($node)."\n"; ?>

Steve K (03-Nov-2009 07:47)

This class apparently also has a getElementsByTagName method. I was able to confirm this by evaluating the output from DOMNodeList->item() against various tests with the is_a() function.

marc at ermshaus dot org (05-May-2009 04:36)

It took me forever to find a mapping for the XML_*_NODE constants. So I thought, it'd be handy to paste it here: 1 XML_ELEMENT_NODE 2 XML_ATTRIBUTE_NODE 3 XML_TEXT_NODE 4 XML_CDATA_SECTION_NODE 5 XML_ENTITY_REFERENCE_NODE 6 XML_ENTITY_NODE 7 XML_PROCESSING_INSTRUCTION_NODE 8 XML_COMMENT_NODE 9 XML_DOCUMENT_NODE 10 XML_DOCUMENT_TYPE_NODE 11 XML_DOCUMENT_FRAGMENT_NODE 12 XML_NOTATION_NODE

matt at lamplightdb dot co dot uk (06-Apr-2009 01:39)

And apparently also a setAttribute method too: $node->setAttribute( 'attrName' , 'value' );

jorge dot hebrard at gmail dot com (24-Jan-2009 01:29)

Try canonicalization: <?php $dom = new DOMDocument; $dom->loadHTMLFile('http://www.example.com/'); echo $dom->documentElement->C14N(); ?> Or output it to a file, using C14NFile() Undocumented stuff ;)

brian wildwoodassociates.info (08-Dec-2008 07:27)

This class has a getAttribute method. Assume that a DOMNode object $ref contained an anchor taken out of a DOMNode List. Then $url = $ref->getAttribute('href'); would isolate the url associated with the href part of the anchor.

The DOMNode class

类摘要

属性

注释

参见

Table of Contents

用户评论: