在DomXML和PHP中通过属性值获取节点
我试图选择一个特定的节点来编辑它的内容和属性,但是我无法选择一个在DomXML和PHP中通过属性值获取节点,php,xml,Php,Xml,我试图选择一个特定的节点来编辑它的内容和属性,但是我无法选择一个注意节点(参见下面的PHP代码) XML文档 <?xml version="1.0" encoding="UTF-8"?> <notices lastID="0001"> <!-- <notice id="0000" endDate="31-12-2025"> Content of the notice. </notice> --&
注意
节点(参见下面的PHP代码)
XML文档
<?xml version="1.0" encoding="UTF-8"?>
<notices lastID="0001">
<!--
<notice id="0000" endDate="31-12-2025">
Content of the notice.
</notice>
-->
<notice id="0001" endDate="13-01-2013" active="1">
One amazing notice.
</notice>
</notices>
每次我陷入if
语句时,我的$notice
都不返回任何值。我尝试了xpath查询(
//注意[@id=“{$id}”]
),但没有成功
为了澄清,我的问题是$element->getAttribute('id')
似乎不起作用
我还尝试了使用SimpleXML: PHP
$document = new DOMDocument;
$document = dom_import_simplexml($this->xml);
$notices= $document->getElementsByTagName('notice');
#var_dump($notices);
foreach($notices as $element)
{
if($element->getAttribute('id') == $id)
{
$notice = $element;
var_dump($notice); //Returns absolutely nothing (I guess the if returns false).
}
}
$notice->removeAttribute("endDate");
$notice->setAttribute("endDate",$endDate);
$document = new DOMDocument;
$document = simplexml_import_dom($this->xml);
$notice = "";
foreach($document->notices->children() as $element)
{
$attributes = $element->attributes();
if($attributes['id'] == $id)
{
$notice= $element;
var_dump($notice);
}
}
$avis->removeAttribute("endDate");
$avis->setAttribute("endDate",$endDate);
$document = simplexml_import_dom($this->xml);
$notice = "";
$xpathResults = $document->xpath('//notice');
foreach($xpathResults as $element)
{
$elementID = $element->id[0];
$domXML = dom_import_simplexml($element);
if((string) $noticeID == $id)
{
$notice = $domXML;
}
}
SimpleXML给了我以下消息:节点不再存在
在下一行:
foreach($document->notices->children()作为$element)
我终于得到了它
PHP
$document = new DOMDocument;
$document = dom_import_simplexml($this->xml);
$notices= $document->getElementsByTagName('notice');
#var_dump($notices);
foreach($notices as $element)
{
if($element->getAttribute('id') == $id)
{
$notice = $element;
var_dump($notice); //Returns absolutely nothing (I guess the if returns false).
}
}
$notice->removeAttribute("endDate");
$notice->setAttribute("endDate",$endDate);
$document = new DOMDocument;
$document = simplexml_import_dom($this->xml);
$notice = "";
foreach($document->notices->children() as $element)
{
$attributes = $element->attributes();
if($attributes['id'] == $id)
{
$notice= $element;
var_dump($notice);
}
}
$avis->removeAttribute("endDate");
$avis->setAttribute("endDate",$endDate);
$document = simplexml_import_dom($this->xml);
$notice = "";
$xpathResults = $document->xpath('//notice');
foreach($xpathResults as $element)
{
$elementID = $element->id[0];
$domXML = dom_import_simplexml($element);
if((string) $noticeID == $id)
{
$notice = $domXML;
}
}
您是否检查了XML文档是否已正确加载?不确定这是否是答案,但尝试使用
DOMDocument::load()
加载文件,您不需要创建它的新实例DOMDocument
。您可以直接使用xpath来实现。您可能需要找出它不适用于您的原因,可能$id
包含了一些不同的内容,或者您的xpath表达式已损坏。使用变量,如果它不起作用,您可以使用var_转储这些变量并查看发生了什么: