DOMElement::setAttribute

(PHP 5, PHP 7, PHP 8)

DOMElement::setAttribute — Añade un nuevo atributo o modifica uno existente

Descripción

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

Establece un atributo con nombre qualifiedName al valor dado. Si el atributo no existe, se creará.

Parámetros

qualifiedName: El nombre del atributo.
value: El valor del atributo.

Valores devueltos

El DOMAttr creado o modificado o false si ocurrió un error.

Errores/Excepciones

DOM_NO_MODIFICATION_ALLOWED_ERR: Lanzado si el nodo es de sólo lectura.

Ejemplos

Ejemplo #1 Establecer un atributo

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

Ver también

DOMElement::hasAttribute() - Comprueba si existe un atributo
DOMElement::getAttribute() - Devuelve el valor de un atributo
DOMElement::removeAttribute() - Elimina un atributo

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User Contributed Notes 6 notes

down

Rakesh Verma - rakeshnsony at gmail dot com ¶

14 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;

?>

down

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>
?>

down

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');
?>

down

-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();

down

-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">

down

-7

Vasil Rangelov ¶

17 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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