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DOMDocument::createAttributeNS

(PHP 5, PHP 7, PHP 8)

DOMDocument::createAttributeNSYeni bir isim alanlı öznitelik düğümü oluşturur

Açıklama

public DOMDocument::createAttributeNS(?string $namespace, string $qualifiedName): DOMAttr|false

Yeni bir DOMAttr nesnesi oluşturur. Bu düğüm, DomNode::append_child() gibi bir yöntemle belgeye yerleştirilmedikçe belgede gösterilmez.

Bağımsız Değişkenler

namespace

İsim alanını betimleyen adres.

qualifiedName

önek:öznitelik biçeminde etiket ismi.

Dönen Değerler

Bir hata oluşursa false yoksa yeni bir DOMAttr nesnesi döner.

Hatalar/İstisnalar

DOM_INVALID_CHARACTER_ERR

qualifiedName geçersiz karakter içeriyorsa oluşur.

DOM_NAMESPACE_ERR

qualifiedName, isim alanlı bir etiket adı olarak uygun değilse oluşur.

Ayrıca Bakınız

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User Contributed Notes 1 note

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9
_ michael
13 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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