DOMImplementation::hasFeature
To add to xafford's comment. When iterating a named node map collection using ->item() or using foreach, removing a attribute with DOMNode->removeAttribute() or DOMNode->removeAttributeNode() alters the collection as if it were a stack. To illustrate, the code below tries to remove all attributes from each element but only removes the first. One work around is to copy the named node map into an array before removing attributes. Using PHP 5.2.9 on Windows XP.
<?php
error_reporting(E_ALL);
$html = '<h1 id="h1test" class="h1test">Heading</h1>';
$html .= '<p align="left" class="ptest">Hello World</p>';
$doc = new DOMDocument();
$doc->loadHTML($html);
// remove attributes from the h1 element
$h1 = $doc->getElementsByTagName('h1')->item(0);
$length = $h1->attributes->length;
for ($i = 0; $i < $length; ++$i) {
$name = $h1->attributes->item($i)->name;
$h1->removeAttribute($name);
echo "h1: removed attribute `$name`<br>";
}
// remove attributes from the p element
$p = $doc->getElementsByTagName('p')->item(0);
foreach ($p->attributes as $name => $attrNode) {
$p->removeAttribute($name);
echo "p: removed attribute `$name`<br>";
}
?>
OUTPUT:
-------
h1: removed attribute `id`
Notice: Trying to get property of non-object in nodemap.php on line 13
h1: removed attribute ``
p: removed attribute `align`
La classe DOMNamedNodeMap
Synopsis de la classe
DOMNamedNodeMap
DOMNamedNodeMap
{
/* Propriétés */
/* Méthodes */
}Sommaire
- DOMNamedNodeMap::getNamedItem — Retourne un noeud spécifié par nom nom
- DOMNamedNodeMap::getNamedItemNS — Retourne un noeud spécifié par son nom local et son espace de noms
- DOMNamedNodeMap::item — Retourne un noeud selon son index
add a note
User Contributed NotesDOMNamedNodeMap
kendsnyder at gmail dot com
29-Oct-2009 03:55
29-Oct-2009 03:55
xafford
15-Oct-2009 10:16
15-Oct-2009 10:16
I stumbled upon a problem with DOMNamedNodeMap. If you iterate over a DOMNamedNodeMap, representing the attributes of a DOMElement with foreach and you use DOMElement::removeAttributeNode only the first attribute will be handled.
Example (not complete):
<?php
/*
* Imagine you got a node like this:
* <a onclick="alert('evil')" href="http://example.com">evil</a>
* and onclick should be removed, href would not be tested.
*/
foreach ( $node->attributes as $attribute )
{
echo 'checking attribute ', $attribute->name, '<br />';
if ( ! in_array ( $attribute->name, $allowed_attributes ) )
{
$node->removeAttributeNode ( $attribute );
}
}
?>
The output would be:
checking attribute onclick
jtaal at eljakim dot nl
18-Aug-2008 01:14
18-Aug-2008 01:14
You can iterate over an instance of DOMNamedNodeMap:
<?php
// suppose $node is a valid DOMElement object
// $node->attributes will be NULL or a valid DOMNamedNodeMap object
foreach ($node->attributes as $attrName => $attrNode) {
}
?>