[edit] Last updated: Fri, 07 Jun 2013

DOMDocument::createAttributeNS

(PHP 5)

DOMDocument::createAttributeNS — Create new attribute node with an associated namespace

Descrierea

DOMAttr DOMDocument::createAttributeNS ( string $namespaceURI , string $qualifiedName )

This function creates a new instance of class DOMAttr. Acest nod nu va apărea în document dacă nu este inserat cu DOMNode::appendChild() de exemplu.

Parametri

namespaceURI: The URI of the namespace.
qualifiedName: The tag name and prefix of the attribute, as prefix:tagname.

Valorile întoarse

The new DOMAttr or FALSE if an error occurred.

Erori/Excepții

DOM_INVALID_CHARACTER_ERR: Raised if qualifiedName contains an invalid character.
DOM_NAMESPACE_ERR: Raised if qualifiedName is a malformed qualified name, or if qualifiedName has a prefix and namespaceURI is NULL.

Vedeți de asemenea

DOMNode::appendChild() - Adds new child at the end of the children
DOMDocument::createAttribute() - Create new attribute
DOMDocument::createCDATASection() - Create new cdata node
DOMDocument::createComment() - Create new comment node
DOMDocument::createDocumentFragment() - Create new document fragment
DOMDocument::createElement() - Create new element node
DOMDocument::createElementNS() - Create new element node with an associated namespace
DOMDocument::createEntityReference() - Create new entity reference node
DOMDocument::createProcessingInstruction() - Creates new PI node
DOMDocument::createTextNode() - Create new text node

add a note User Contributed Notes DOMDocument::createAttributeNS - [1 notes]

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_ michael ¶

3 years ago


If a new namespace is introduced while creating and inserting an attribute, createAttributeNS() does not behave in the same way as createElementNS().



(1) Location: With createAttributeNS(), the new namespace is declared at the level of the document element. By contrast, createElementNS() declares the new namespace at the level of the affected element itself.



(2) Timing: With createAttributeNS(), the new namespace is declared in the document as soon as the attribute is created - the attribute does not actually have to be inserted. createElementNS() doesn't affect the document as long as the element is not inserted.



An example:



<?php

    

    $source = <<<XML

<?xml version="1.0" encoding="UTF-8"?>

<root><tag></tag></root>

XML;

    

    /*

     

     I. createAttributeNS:

     * a new namespace shows up immediately, even without insertion of the attribute

     * the new namespace is declared at the level of the document element

     

    */

    

    $doc = new DOMDocument( '1.0' );

    $doc->loadXML( $source );

    

    // (1) We just create a "namespace'd" attribute without appending it to any element.

    $attr_ns = $doc->createAttributeNS( '{namespace_uri_here}', 'example:attr' );

    

    print $doc->saveXML() . "\n";

    

    /*

      Result: The namespace declaration appears, having been added to the document element. Output:

      

      <?xml version="1.0" encoding="UTF-8"?>

      <root xmlns:example="{namespace_uri_here}"><tag/></root>

      

    */

    

    // (2) Next, we give the attribute a value and insert it.

    $attr_ns->value = 'value'; 

    $doc->getElementsByTagName( 'tag' )->item(0)->appendChild( $attr_ns );

    

    print $doc->saveXML() . "\n";

    

    /*

      Result: The "namespace'd" attribute shows up as well. Output:

      

      <?xml version="1.0" encoding="UTF-8"?>

      <root xmlns:example="{namespace_uri_here}"><tag example:attr="value"/></root>

      

    */

    

    /*

     

     II. createElementNS:

     * a new namespace shows up only when the element is inserted

     * the new namespace is declared at the level of the inserted element

     

    */

    

    $doc = new DOMDocument( '1.0' );

    $doc->loadXML( $source );

    

    // (1) We create a "namespace'd" element without inserting it into the document.

    $elem_ns = $doc->createElementNS( '{namespace_uri_here}', 'example:newtag' );

    

    print $doc->saveXML() . "\n";

    

    /*

      Result: The document remains unchanged. Output:

      

      <?xml version="1.0" encoding="UTF-8"?>

      <root><tag/></root>

      

    */

    

    // (2) Next, we insert the new element.

    $doc->getElementsByTagName( 'tag' )->item(0)->appendChild( $elem_ns );

    

    print $doc->saveXML() . "\n";

    

    /*

      Result: The namespace declaration appears, and it is embedded in the element using it. Output:

      

      <?xml version="1.0" encoding="UTF-8"?>

      <root><tag><example:newtag xmlns:example="{namespace_uri_here}"/></tag></root>

      

    */

    

?>

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