CascadiaPHP 2024

DOMElement::setAttribute

(PHP 5, PHP 7, PHP 8)

DOMElement::setAttributeAdiciona ou modifica um atributo existente

Descrição

public DOMElement::setAttribute(string $qualifiedName, string $value): DOMAttr|bool

Define um atributo com o nome qualifiedName para o valor fornecido. Se o atributo não existir, ele será criado.

Parâmetros

qualifiedName

O nome do atributo.

value

O valor do atributo.

Valor Retornado

O DOMAttr criado ou modificado, ou false se ocorrer um erro.

Erros/Exceções

DOM_NO_MODIFICATION_ALLOWED_ERR

Gerado se o nó for somente leitura.

Exemplos

Exemplo #1 Setando um atributo

<?php
$doc
= new DOMDocument("1.0");
$node = $doc->createElement("para");
$newnode = $doc->appendChild($node);
$newnode->setAttribute("align", "left");
?>

Veja Também

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User Contributed Notes 6 notes

up
13
Rakesh Verma - rakeshnsony at gmail dot com
13 years ago
<?php
//Store your html into $html variable.
$html="
<html>
<head>
<title>Untitled Document</title>
</head>

<body>
<a href='http://example.com'>Example</a><br>
<a href='http://google.com'>Google</a><br>

<a href='http://www.yahoo.com'>Yahoo</a><br>
</body>

</html>"
;

$dom = new DOMDocument();
$dom->loadHTML($html);

//Evaluate Anchor tag in HTML
$xpath = new DOMXPath($dom);
$hrefs = $xpath->evaluate("/html/body//a");

for (
$i = 0; $i < $hrefs->length; $i++) {
$href = $hrefs->item($i);
$url = $href->getAttribute('href');

//remove and set target attribute
$href->removeAttribute('target');
$href->setAttribute("target", "_blank");

$newURL=$url."/newurl";

//remove and set href attribute
$href->removeAttribute('href');
$href->setAttribute("href", $newURL);
}

// save html
$html=$dom->saveHTML();

echo
$html;

?>
up
2
lehal2@hotmail
11 years ago
The use of Dom to first remove and then add the width and height to the first img tag from the text.I hope it help you to save your time
<?php
$html
= '

<img src="http://www.example.com/images/header.jpg" width="898" height="223" style="border-bottom:5px solid #cccccc;"/>
<img src="http://www.example.com/images/header2.jpg" width="898" height="223" style="border-bottom:5px solid #cccccc;"/>
'
;

$doc = DOMDocument::loadHTML($html);
$c =0;
foreach(
$doc->getElementsByTagName('img') as $image){
if (
$c>0) continue;
foreach(array(
'width', 'height') as $attribute_to_remove){
echo
$attribute_to_remove;
if(
$image->hasAttribute($attribute_to_remove)){
$image->removeAttribute($attribute_to_remove);

}
if(
$attribute_to_remove=='height'){
if(!
$image->hasAttribute($attribute_to_remove)){
$image->setAttribute($attribute_to_remove,'220');

}}
if(
$attribute_to_remove=='width'){
if(!
$image->hasAttribute($attribute_to_remove)){
$image->setAttribute($attribute_to_remove,'700');

}}
$c = $c+1;
}
}
echo
$doc->saveHTML();
up
1
info at ensostudio dot ru
2 years ago
Solution to render HTML 5 tags with attributes with/without value:
<?php
$dom
= new DOMImplementation();
$doc = $dom->createDocument(null, 'html', $dom->createDocumentType('html'));

$tag = $doc->appendChild($doc->createElement('input'));
$tag->setAttribute('type', 'text');
$tag->setAttribute('disabled', '');

echo
$doc->saveHTML($tag); // <input type="text" disabled="">

$doc->normalize(); // normalize attributes
echo $doc->saveHTML($tag); // <input type="text" disabled>
?>
up
2
address at gmail dot com
16 years ago
If wanting to set an attribute of an element with unique id of "1"

<?php
$dom
= new DomDocument();
$dom->load('test.xml');
$xp = new DomXPath($dom);
$res = $xp->query("//*[@id = '1']");
$res->item(0)->setAttribute('title','2');
$dom->save('test.xml');
?>
up
-4
karvjorm at users.sourceforge.net
17 years ago
$dom = new DomDocument('1.0','iso-8859-15');

$ht_ml = $dom->appendChild($dom->createElement('html'));
$ht_ml->setAttribute('xmlns','http://www.w3.org/1999/xhtml');
$ht_ml->setAttribute('xml:lang','fi');
$ht_ml->setAttribute('lang','fi');

Result:

<?xml version="1.0" encoding="iso-8859-15"?>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fi" lang="fi">
up
-5
Vasil Rangelov
16 years ago
@karvjorm,
Using this method is not exactly a good practice. Infact, I think it may be a bug.
Names beginning with "xml" are reserved (for namespaces in this case).
setAttribute() should return false in this case I think, but I suppose it doesn't.

Still, the right way to do it is with createElementNS().
It lets you specify the namespace when creating the element node.

So the equivalent to yours ($html added to allow word wrapping) is:

$dom = new DomDocument('1.0','iso-8859-15');
$html = $dom->createElementNS('http://www.w3.org/1999/xhtml', 'html');
$ht_ml = $dom->appendChild($html);
$ht_ml->setAttribute('xml:lang','fi');
$ht_ml->setAttribute('lang','fi');
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