PHP 使用 DOMdocument 更新 xml CDATA 字段
PHP updating xml CDATA fields with DOMdocument
我有以下 XML 数据:
<?xml version="1.0" encoding="utf-8"?>
<source>
<publisher>some-data</publisher>
<publisherurl>some-data</publisherurl>
<lastBuildDate>a-date</lastBuildDate>
<element>
<sub-element><![CDATA[some-data]]></sub-element>
</element>
</source>
我正在尝试使用 PHP 的内置 DOMdocument 解析器来更新 sub-element
中的文本。
我试过:
$dom=new DOMDocument();
$dom->load("document.xml");
$ele=$root->getElementsByTagName('element');
foreach ($ele as $e) {
$e->getElementsByTagName('sub-element')->item(0)->nodeValue = "new val";
}
这种方法可行,但它删除了 CDATA 并仅将其替换为 new-val
。我想保留 CDATA 字段,所以我尝试了以下操作:
$dom=new DOMDocument();
$dom->load("document.xml");
$ele=$root->getElementsByTagName('element');
foreach ($ele as $e) {
$sub=$e->getElementsByTagName('sub-element');
foreach($sub->childNodes as $child) {
if ($child->nodeType == XML_CDATA_SECTION_NODE) {
$child->nodeValue = 'new-val';
}
}
}
这似乎应该有效,但是 PHP returns 以下 注意
Undefined property: DOMNodeList::$childNodes
感觉我走在正确的道路上,但我就是想不通我做错了什么。有谁知道如何解决?
我的最终目标输出是:
<?xml version="1.0" encoding="utf-8"?>
<source>
<publisher>some-data</publisher>
<publisherurl>some-data</publisherurl>
<lastBuildDate>a-date</lastBuildDate>
<element>
<sub-element><![CDATA[new-val]]></sub-element>
</element>
</source>
您需要与 firstChild
进行比较
$xml = '<?xml version="1.0" encoding="utf-8"?>
<source>
<publisher>some-data</publisher>
<publisherurl>some-data</publisherurl>
<lastBuildDate>a-date</lastBuildDate>
<element>
<sub-element><![CDATA[some-data]]></sub-element>
</element>
<element>
<sub-element>some-other-data</sub-element>
</element>
</source>';
$dom = new DOMDocument();
$dom->loadXML($xml);
$ele=$dom->getElementsByTagName('element');
foreach ($ele as $e) {
$item = $e->getElementsByTagName('sub-element')->item(0);
if($item->firstChild->nodeType == XML_CDATA_SECTION_NODE) { //<------
//it's CDATA do whatever
$item->firstChild->nodeValue = "new val";
} else {
//it's not , do something else
$item->nodeValue = "new val";
}
}
echo "<pre>";
print_r(htmlentities($dom->saveXML()));
echo "</pre>";
输出:
<?xml version="1.0" encoding="utf-8"?>
<source>
<publisher>some-data</publisher>
<publisherurl>some-data</publisherurl>
<lastBuildDate>a-date</lastBuildDate>
<element>
<sub-element><![CDATA[new val]]></sub-element>
</element>
<element>
<sub-element>new val</sub-element>
</element>
</source>
PS:如果不用区分CDATA与否,就用firstChild
foreach ($ele as $e) {
$item = $e->getElementsByTagName('sub-element')->item(0);
$item->firstChild->nodeValue = "new val";
}
我有以下 XML 数据:
<?xml version="1.0" encoding="utf-8"?>
<source>
<publisher>some-data</publisher>
<publisherurl>some-data</publisherurl>
<lastBuildDate>a-date</lastBuildDate>
<element>
<sub-element><![CDATA[some-data]]></sub-element>
</element>
</source>
我正在尝试使用 PHP 的内置 DOMdocument 解析器来更新 sub-element
中的文本。
我试过:
$dom=new DOMDocument();
$dom->load("document.xml");
$ele=$root->getElementsByTagName('element');
foreach ($ele as $e) {
$e->getElementsByTagName('sub-element')->item(0)->nodeValue = "new val";
}
这种方法可行,但它删除了 CDATA 并仅将其替换为 new-val
。我想保留 CDATA 字段,所以我尝试了以下操作:
$dom=new DOMDocument();
$dom->load("document.xml");
$ele=$root->getElementsByTagName('element');
foreach ($ele as $e) {
$sub=$e->getElementsByTagName('sub-element');
foreach($sub->childNodes as $child) {
if ($child->nodeType == XML_CDATA_SECTION_NODE) {
$child->nodeValue = 'new-val';
}
}
}
这似乎应该有效,但是 PHP returns 以下 注意
Undefined property: DOMNodeList::$childNodes
感觉我走在正确的道路上,但我就是想不通我做错了什么。有谁知道如何解决?
我的最终目标输出是:
<?xml version="1.0" encoding="utf-8"?>
<source>
<publisher>some-data</publisher>
<publisherurl>some-data</publisherurl>
<lastBuildDate>a-date</lastBuildDate>
<element>
<sub-element><![CDATA[new-val]]></sub-element>
</element>
</source>
您需要与 firstChild
$xml = '<?xml version="1.0" encoding="utf-8"?>
<source>
<publisher>some-data</publisher>
<publisherurl>some-data</publisherurl>
<lastBuildDate>a-date</lastBuildDate>
<element>
<sub-element><![CDATA[some-data]]></sub-element>
</element>
<element>
<sub-element>some-other-data</sub-element>
</element>
</source>';
$dom = new DOMDocument();
$dom->loadXML($xml);
$ele=$dom->getElementsByTagName('element');
foreach ($ele as $e) {
$item = $e->getElementsByTagName('sub-element')->item(0);
if($item->firstChild->nodeType == XML_CDATA_SECTION_NODE) { //<------
//it's CDATA do whatever
$item->firstChild->nodeValue = "new val";
} else {
//it's not , do something else
$item->nodeValue = "new val";
}
}
echo "<pre>";
print_r(htmlentities($dom->saveXML()));
echo "</pre>";
输出:
<?xml version="1.0" encoding="utf-8"?>
<source>
<publisher>some-data</publisher>
<publisherurl>some-data</publisherurl>
<lastBuildDate>a-date</lastBuildDate>
<element>
<sub-element><![CDATA[new val]]></sub-element>
</element>
<element>
<sub-element>new val</sub-element>
</element>
</source>
PS:如果不用区分CDATA与否,就用firstChild
foreach ($ele as $e) {
$item = $e->getElementsByTagName('sub-element')->item(0);
$item->firstChild->nodeValue = "new val";
}