PHP DOMDocument用HTML字符串替换DOMElement小孩 [英] PHP DOMDocument replace DOMElement child with HTML string
问题描述
使用PHP我试图从WYSIWYG编辑器中传递一个HTML字符串,并用新的HTML替换预加载的HTML文档中元素的子元素。
Using PHP I'm attempting to take an HTML string passed from a WYSIWYG editor and replace the children of an element inside of a preloaded HTML document with the new HTML.
到目前为止,我正在加载标识要由ID更改的元素的文档,但将HTML转换为可放置在DOMElement内的东西的过程不在我身上。
So far I'm loading the document identifying the element I want to change by ID but the process to convert an HTML to something that can be placed inside a DOMElement is eluding me.
libxml_use_internal_errors(true);
$doc = new DOMDocument();
$doc->loadHTML($html);
$element = $doc->getElementById($item_id);
if(isset($element)){
//Remove the old children from the element
while($element->childNodes->length){
$element->removeChild($element->firstChild);
}
//Need to build the new children from $html_string and append to $element
}
推荐答案
如果HTML字符串可以解析为XML,则可以这样做(清除所有子节点的元素后):
If the HTML string can be parsed as XML, you can do this (after clearing the element of all child nodes):
$fragment = $doc->createDocumentFragment();
$fragment->appendXML($html_string);
$element->appendChild($fragment);
如果$ html_string无法解析为XML,它将失败。如果是这样,你必须使用不太严格的loadHTML(),但它会添加元素周围的片段,你必须剥离。
If $html_string cannot be parsed as XML, it will fail. If it does, you’ll have to use loadHTML(), which is less strict — but it will add elements around the fragment which you will have to strip.
不同PHP,Javascript有innerHTML属性,可以很容易地做到这一点。我需要像项目这样的东西,所以我扩展了PHP的DOMElement,以包含类似Javascript的innerHTML访问。
Unlike PHP, Javascript has the innerHTML property which allows you to do this very easily. I needed something like it for a project so I extended PHP’s DOMElement to include Javascript-like innerHTML access.
使用它,您可以访问innerHTML属性并更改它,就像您一样将在Javascript中:
With it you can access the innerHTML property and change it just as you would in Javascript:
echo $element->innerHTML;
$elem->innerHTML = '<a href="http://example.org">example</a>';
资料来源: http://www.keyvan.net/2012/11/php- domdocument-replace-domelement-child-with-html-string /
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