在php中帮助DOMDocument类 [英] help with DOMDocument class in php

问题描述

这里是我的xml DOM。

here is my xml DOM.

        <entities>
            <entity id="7006276">
                <title>xxx</title>
                <entities>
                    <entity id="7877579">
                       <title>xxx</title>
                       <entities>

我想获得ID为7006276的实体，所以我可以访问其实体为此创建一些实体元素。

i want to get the 'entity' with id 7006276 so i could access its child 'entities' to create some 'entity' elements for it.

我尝试过：

 $this->xmlDocument = new DOMDocument();
 // some code creating the above elements (you dont have to care about this comment code...it just creates the above xml structure
 // $this->xmlDocument->createElement('entity');
 // $sourceEntityElement->appendChild($newEntityElement);
 // and so on...

 // now i want to get the entities mentioned...
 $xmlEntities = $this->xmlDocument->getElementById('7006276')->entities;

但它似乎不起作用任何想法我如何得到它，所以我可以创建更多的实体元素

but it doesnt seem to work. any idea how i get it so i can create more 'entity' elements?

推荐答案

现在，当您调用 DOMDocument :: getElementById 时，PHP不知道要查找什么属性，根据 getElementById 的文档，您需要要设置通知PHP关于您的 id 属性与 DOMElement :: setIdAttrib ute 或使用 DOMDocument :: validate 的DTD验证您的文档。

Right now, PHP doesn't know what attribute to look for when you call DOMDocument::getElementById. According to the documentation for getElementById, you need to either set inform PHP about your id attribute with DOMElement::setIdAttribute or validate your document against a DTD with DOMDocument::validate.

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