[edit] Last updated: Fri, 25 May 2012

La clase DOMNode

(PHP 5)

Sinopsis de la Clase

DOMNode {

/* Propiedades */

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 ;

/* Métodos */

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 )

}

Propiedades

nodeName: Devuelve el nombre más exacto del tipo de nodo actual
nodeValue: El valor de este nodo, dependiendo de su tipo
nodeType: Obtiene el tipo del nodo. Una de las constantes XML_xxx_NODE predefinidas
parentNode: El padre de este nodo
childNodes: Un objeto DOMNodeList que tiene todos los hijos de este nodo. Si no hubiera hijos, es un objeto DOMNodeList vacío.
firstChild: El primer hijo de este nodo. Si no existiera tal nodo devuelve NULL.
lastChild: El último hijo de este nodo. Si no existiera tal nodo devuelve NULL.
previousSibling: El nodo que precede inmediatamente a este ndo. Si no existiera tal nodo devuelve NULL.
nextSibling: El nodo inmediatamente siguiente a este nodo. Si no existiera tal nodo devuelve NULL.
attributes: Un objeto DOMNamedNodeMap que contiene los atributos de este nodo (si es un objeto DOMElement) o NULL de otro modo.
ownerDocument: El objeto DOMDocument asociado con este nodo.
namespaceURI: La URI del espacio de nombres de este nodo, o NULL si no está especificado.
prefix: El prefijo del espacio de nombres de este nodo, o NULL si no está especificado.
localName: Devuelve la parte local del nombre cualificado de este nodo.
baseURI: La URI base absoluta de este nodo o NULL si la implementación no fue capaz de obtener una URI absoluta.
textContent: Este atributo devuelve el contenido de texto de este nodo y sus descendientes.

Notas

Nota:
La extensión DOM utiliza la codificación UTF-8. Use utf8_encode() y utf8_decode() para trabajar con textos con codificación ISO-8859-1 o Iconv para otras codificaciones.

Ver también

» Especificaión de Nodo del W3C

Tabla de contenidos

DOMNode::appendChild — Añade un nuevo hijo al final de los hijos
DOMNode::C14N — Canonizar nodos a una cadena
DOMNode::C14NFile — Canonizar nodos a un fichero
DOMNode::cloneNode — Clona un nodo
DOMNode::getLineNo — Obtener el número de línea de un nodo
DOMNode::getNodePath — Obtener un XPath de un nodo
DOMNode::hasAttributes — Comprueba si un nodo tiene atributos
DOMNode::hasChildNodes — Comprueba si el nodo tiene hijos
DOMNode::insertBefore — Añade un nuevo hijo antes del nodo de referencia
DOMNode::isDefaultNamespace — Comprueba si la URI del espacio de nombres especificada es el espacio de nombres predeterminado
DOMNode::isSameNode — Indica si dos nodos son el mismo nodo
DOMNode::isSupported — Comprueba si una característica está soportada para la versión especificada
DOMNode::lookupNamespaceURI — Obtiene la URI del espacio de nombres del nodo basado en el prefijo
DOMNode::lookupPrefix — Obtiene el prefijo del espacio de nombres del nodo basándoes en la URI del espacio de nombres
DOMNode::normalize — Normaliza el nodo
DOMNode::removeChild — Elimina un hijo de la lista de hijos.
DOMNode::replaceChild — Reemplaza un hijo

DOMNode::appendChild

DOMNamedNodeMap::item

[edit] Last updated: Fri, 25 May 2012

add a note User Contributed Notes DOMNode

alastair dot dallas at gmail dot com 25-Sep-2011 08:44


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><p>First text.</p><ul><li><p>First bullet</p></li></ul></div>, you'll get XML_ELEMENT_NODEs that are quite regular. The <div> has children <p> and <ul> and the nodeValue for both <p>s yields the text you expect.



But when your markup is more like <p>This is <b>bold</b> and this is <i>italic</i>.</p>, you realize that the nodeValue for XML_ELEMENT_NODEs is not reliable. In this case, you need to look at the <p>'s child nodes. For this example, the <p> has children: #text, <b>, #text, <i>, #text. 



In this example, the nodeValue of <b> and <i> is the same as their #text children. But you could have markup like: <p>This <b>is bold and <i>bold italic</i></b>, you see?</p>. In this case, you need to look at the children of <b>, which will be #text, <i>, because the nodeValue of <b> 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 01:33


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 01:17


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 06:10


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

I. Cook 19-Apr-2010 02:43


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 09:03


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 01:54


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 11:47


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 08:36


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 05:39


And apparently also a setAttribute method too:



$node->setAttribute( 'attrName' , 'value' );

jorge dot hebrard at gmail dot com 23-Jan-2009 05:29


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 07-Dec-2008 11:27


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.

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