修改XML属性PHP DOM [英] Modify XML attribute PHP DOM

问题描述

我有一个看起来像这样的XML文件.

I have an XML file that looks like this.

<collections id="my collections">
 <category id="my category">
   <record id="my record">
     <title>Some Info</title>
   </record>
 </category>
</collections>

我正在寻找使用PHP DOM和Xpath将上述XML文件中的任何属性替换为新属性的方法. 任何帮助都将受到高度赞赏

I am looking for away to replace any attribute in the above XML file with a new attribute,Using PHP DOM and Xpath. Any help is highly appreciated

推荐答案

不确定要执行的操作，但总体思路是:

Not sure what you want to do exactly, but the general idea is :

• 您必须实例化 DOMDocument
• 并使用它加载XML字符串: DOMDocument::loadXML
• 然后，您必须实例化 DOMXpath 上的那个文件
• 并使用它来查询文档: DOMXPath::query
• 您找到了一个您感兴趣的节点，就可以对其进行操作
  • 例如，您可以设置属性的值: DOMElement::setAttribute
  • You must instanciate DOMDocument
  • and load your XML strings with it : DOMDocument::loadXML
  • Then, you must instanciate DOMXpath on that document
  • And use it to query the document : DOMXPath::query
  • One you have found the node that interests you, you can manipulate it
    • for example, you can set the value of an attribute : DOMElement::setAttribute

    
    例如，在这里，您可以使用类似这样的东西:

    
    Here, for example, you could use some thing like this :

    $str = <<<XML
        <collections id="My Collections">
         <category id="my category">
           <record id="my record">
             <title>Some Info</title>
           </record>
         </category>
        </collections>
    XML;
    
    $dom = new DOMDocument();
    $dom->loadXML($str);
    
    $xpath = new DOMXPath($dom);
    $elements = $xpath->query('//record[@id="my record"]');
    if ($elements->length >= 1) {
        $element = $elements->item(0);
        $element->setAttribute('id', "glop !");
    }
    echo '<pre>' . htmlspecialchars($dom->saveXML()) . '</pre>';
    

    
    这会将由它标识的节点上的id属性my record替换为"glop !"，您将获得以下XML作为输出:

    
    This will replace the id attribute my record, on the node that's identified by it, by "glop !", and you'd get the following XML as output :

    <?xml version="1.0"?>
    <collections id="My Collections">
         <category id="my category">
           <record id="glop !">
             <title>Some Info</title>
           </record>
         </category>
        </collections>
    

    这篇关于修改XML属性PHP DOM的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！