DOMElement::removeAttribute

(PHP 5, PHP 7, PHP 8)

DOMElement::removeAttribute — Removes attribute

说明

public DOMElement::removeAttribute(string $qualifiedName): bool

Removes attribute named qualifiedName from the element.

参数

qualifiedName: The name of the attribute.

返回值

成功时返回 true，或者在失败时返回 false。

错误／异常

DOM_NO_MODIFICATION_ALLOWED_ERR: Raised if the node is readonly.

参见

DOMElement::hasAttribute() - Checks to see if attribute exists
DOMElement::getAttribute() - Returns value of attribute
DOMElement::setAttribute() - Adds new or modifies existing attribute

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＋添加备注

用户贡献的备注 2 notes

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Rakesh Verma - rakeshnsony at gmail dot com ¶

14 years ago

<?php

//Store your html into $html variable.

$html="<html>
<head>
<title>Rakesh Verma</title>
</head>

<body>
    <a href='http://example.com'>Example</a>
    <a href='http://google.com'>Google</a>
    <a href='http://www.yahoo.com'>Yahoo</a>
</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.".au";

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

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

echo $html;

?>

down

-1

suwayan at mail dot ru ¶

12 years ago

<?php
/*When I try to get a some attribute from not validated HTML or XML document, PHP dies with no errors in logs or output:
*/
        function is_attribute_value($obj,$type,$value)
        {
            $_ret=false;
            if($obj)
            {
                if($val=$obj->getAttribute($type))
                {
                    if($val==$value)
                    {
                        $_ret=true;
                    }
                }
            }
            return $_ret;
        }
//And this check helped to me:
        function is_attribute_value($obj,$type,$value)
        {
            $_ret=false;
            if($obj->attributes)
            {
                if($val=$obj->getAttribute($type))
                {
                    if($val==$value)
                    {
                        $_ret=true;
                    }
                }
            }
            return $_ret;
        }
?>