DOMElement::setAttribute

(PHP 5, PHP 7)

DOMElement::setAttribute — Adds new attribute

Description

public DOMAttr DOMElement::setAttribute ( string $name , string $value )

Sets an attribute with name name to the given value. If the attribute does not exist, it will be created.

Parameters

name: The name of the attribute.
value: The value of the attribute.

Return Values

The new DOMAttr or FALSE if an error occurred.

Errors/Exceptions

DOM_NO_MODIFICATION_ALLOWED_ERR: Raised if the node is readonly.

Examples

Example #1 Setting an attribute


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

User Contributed Notes

Rakesh Verma - rakeshnsony at gmail dot com

5 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;

?>

address at gmail dot com

7 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');
?>

Vasil Rangelov

8 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');

lehal2@hotmail

2 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();

karvjorm at users.sourceforge.net

9 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">