PHP 8.3.0 RC 6 available for testing

DOMElement::setAttribute

(PHP 5, PHP 7, PHP 8)

DOMElement::setAttributeAdds new or modifies existing attribute

说明

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

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

参数

qualifiedName

The name of the attribute.

value

The value of the attribute.

返回值

The created or modified DOMAttr or false if an error occurred.

错误/异常

DOM_NO_MODIFICATION_ALLOWED_ERR

Raised if the node is readonly.

示例

示例 #1 Setting an attribute

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

参见

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User Contributed Notes 6 notes

up
12
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
1
info at ensostudio dot ru
1 year 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
0
lehal2@hotmail
10 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
0
address at gmail dot com
15 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
-5
karvjorm at users.sourceforge.net
16 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
-7
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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