DOMElement::removeAttributeNode

(PHP 5, PHP 7, PHP 8)

DOMElement::removeAttributeNode — Removes attribute

说明

public DOMElement::removeAttributeNode(DOMAttr $attr): DOMAttr|false

Removes attribute attr from the element.

参数

attr: The attribute node.

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.
DOM_NOT_FOUND_ERR: Raised if attr is not an attribute of the element.

参见

DOMElement::hasAttribute() - Checks to see if attribute exists
DOMElement::getAttributeNode() - Returns attribute node
DOMElement::setAttributeNode() - Adds new attribute node to element

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xr07354 at gmx dot de ¶

11 years ago

Basic: I use PHP5.4.9 from Ubuntu 13.04 repository. The aim of my code is to iterate HTML source (as a DomDocument) recursively and cleanup everything that is not valid to be used inside Epub files (i.e. and attribute align is not valid for paragraphs in Epubs).

FIRST: Today I tried removing attributes from a DOMElement using this simple code:
<?php
for ( $k=0; $k < $element->attributes->length; $k++) {
    if( /* some rule */ ){
var_dump( $element->attributes->item($k)->nodeName);
$element->removeAttributeNode( $element->attributes->item($k));
    }
}
?>
Unfortunately all attributes still existed when this loop was finished, even if these var_dumps told me that deleting them was tried.

I solved this problem iterating the attributes list backward:
<?php
for ( $k = $element->attributes->length - 1; $k >= 0; --$k) {
    if( /* same rule */ ){
var_dump( $element->attributes->item($k)->nodeName);
$element->removeAttributeNode( $element->attributes->item($k));
    }
}
?>
SECOND: DOMElement::removeAttributeNode does NOT return a bool but a DOMAttr object.

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备份地址：http://www.lvesu.com/blog/php/domelement.removeattributenode.php