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    DOMElement::setAttribute

    (PHP 5, PHP 7, PHP 8)

    DOMElement::setAttribute — Adds 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

    add a note add a note

    User Contributed Notes 6 notes

    up
    11
    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;

    ?>
    up
    0
    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
    0
    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
    -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
    -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
    -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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