使用这段XML:
<my_xml>
<entities>
<image url="lalala.com/img.jpg" id="img1" />
<image url="trololo.com/img.jpg" id="img2" />
</entities>
</my_xml>
我必须摆脱图像标签中的所有属性。所以,我已经这样做了:
<?php
$article = <<<XML
<my_xml>
<entities>
<image url="lalala.com/img.jpg" id="img1" />
<image url="trololo.com/img.jpg" id="img2" />
</entities>
</my_xml>
XML;
$doc = new DOMDocument();
$doc->loadXML($article);
$dom_article = $doc->documentElement;
$entities = $dom_article->getElementsByTagName("entities");
foreach($entities->item(0)->childNodes as $child){ // get the image tags
foreach($child->attributes as $att){ // get the attributes
$child->removeAttributeNode($att); //remove the attribute
}
}
?>
不知何故,当我尝试删除 foreach 块中的 from 属性时,看起来内部指针丢失了,它不会删除这两个属性。
有没有其他方法可以做到这一点?
提前谢谢。
将内部foreach
循环更改为:
while ($child->hasAttributes())
$child->removeAttributeNode($child->attributes->item(0));
或从后到前删除:
if ($child->hasAttributes()) {
for ($i = $child->attributes->length - 1; $i >= 0; --$i)
$child->removeAttributeNode($child->attributes->item($i));
}
或者复制属性列表:
if ($child->hasAttributes()) {
foreach (iterator_to_array($child->attributes) as $attr)
$child->removeAttributeNode($attr);
}
其中任何一个都将起作用。