根据用户输入删除 XML 个元素

Question

我想根据用户输入删除一个 XML 条目。

XML 示例：

<YealinkIPPhoneDirectory>
<DirectoryEntry>
<Name>Test321</Name>
<Telephone>101</Telephone>
<Telephone>102</Telephone>
<Telephone>103</Telephone>
</DirectoryEntry>
<DirectoryEntry>
<Name>Test456</Name>
<Telephone>107</Telephone>
<Telephone>108</Telephone>
<Telephone>109</Telephone>
</DirectoryEntry>
<DirectoryEntry>
<Name>Test789</Name>
<Telephone>000</Telephone>
<Telephone>111</Telephone>
<Telephone>222</Telephone>
</DirectoryEntry>
</YealinkIPPhoneDirectory>

因此删除条目DirectoryEntry 到DirectoryEntry 结束。该条目工作正常并提交格式正确的数据：

<?php 
if (isset($_REQUEST['ok'])) { 
$xml = new DOMDocument("1.0","UTF-8"); 
$xml->load("emergency.xml"); 
$rootTag = $xml->getElementsByTagName("YealinkIPPhoneDirectory")->item(0); 
$dataTag = $xml->createElement("DirectoryEntry"); 
$aTag = $xml->createElement("Name",$_REQUEST['a']); 
$bTag = $xml->createElement("Telephone",$_REQUEST['b']); 
$cTag = $xml->createElement("Telephone",$_REQUEST['c']);
$dTag = $xml->createElement("Telephone",$_REQUEST['d']);
$dataTag->appendChild($aTag); 
$dataTag->appendChild($bTag); 
$dataTag->appendChild($cTag);
$dataTag->appendChild($dTag);
$rootTag->appendChild($dataTag); 
$xml->save("emergency.xml");
 } 
 ?> 
 <form class="form-horizontal" action="emergencycontacts.php" method="post">
  <form class="form-horizontal" action="emergencycontacts.php" method="post">
<fieldset>

<!-- Form Name -->
<legend> </legend>

<!-- Text input-->
<div class="form-group">
  <label class="col-md-4 control-label">Full Name</label>  
  <div class="col-md-5">
 <input class="form-control input-md" required="" type="text" name="a" /> 
 <span class="help-block">Required</span>  
  </div>
</div>


<!-- Text input-->
<div class="form-group">
  <label class="col-md-4 control-label">Extension</label>  
  <div class="col-md-2">
 <input class="form-control input-md" value=" " type="text" name="b" /> 
 <span class="help-block">Internal</span>  
  </div>
</div>

 <!-- Text input-->
<div class="form-group">
  <label class="col-md-4 control-label">Direct Phone Line</label>  
  <div class="col-md-4">
 <input class="form-control input-md" value=" " type="text" name="c" /> 
 <span class="help-block">External</span>  
  </div>
</div>

 <!-- Text input-->
<div class="form-group">
  <label class="col-md-4 control-label">Cellular Phone</label>  
  <div class="col-md-4">
 <input class="form-control input-md" value=" " type="text" name="d" />
 <span class="help-block">External</span>  
  </div>
</div>

 <!-- Button (Double) -->
<div class="form-group">
  <label class="col-md-4 control-label" for="button1id"></label>
  <div class="col-md-8">
    <input class="btn btn-primary" input type="submit" name="ok" value="Submit Entry" >


  </div>
</div>

</fieldset>
 </form>

当我在下面放置第二个表单并尝试使用 foreach 删除节点时，我没有添加或删除任何结果。表格保持原样：

                <p>Please fill in the below form to REMOVE a contact to the phone system.</p>

<?php 
if (isset($_REQUEST['ok2'])) { 
$xml = new DOMDocument("1.0","UTF-8"); 
$xml->load("emergency.xml"); 
$aTag = $_POST['a'];
$xpath = new DOMXPATH($xml);
foreach($xpath->query("/YealinkIPPhone/DirectoryEntry[a = '$aTag']") as $node)
{
    $node->parentNode->removeChild($node);
}
$xml->formatoutput = true;
$xml->save("emergency.xml");
 } 
 ?> 
 <form class="form-horizontal" action="emergencycontacts.php" method="post">
  <form class="form-horizontal" action="emergencycontacts.php" method="post">
<fieldset>

<!-- Form Name -->
<legend> </legend>

<!-- Text input-->
<div class="form-group">
  <label class="col-md-4 control-label">Full Name</label>  
  <div class="col-md-5">
 <input class="form-control input-md" required="" type="text" name="a" /> 
 <span class="help-block">Required</span>  
  </div>
</div>

 <!-- Button (Double) -->
<div class="form-group">
  <label class="col-md-4 control-label" for="button1id"></label>
  <div class="col-md-8">
    <input class="btn btn-primary" input type="submit" name="ok2" value="Delete Entry" >

我到处搜索，没有找到太多关于根据用户输入删除数据的信息。有没有更好的方法来删除元素？我没有看到我缺少什么。

Answer 1

以下 XPath 查询不符合 XML 结构：

/YealinkIPPhone/DirectoryEntry[a = '$aTag']

即 XML 的根元素名为 YealinkIPPhoneDirectory，而不是 YealinkIPPhone。需要评估值的 DirectoryEntry 元素的子元素是 Name 而不是 a :

foreach($xpath->query("/YealinkIPPhoneDirectory/DirectoryEntry[Name = '$aTag']") as $node)
{
    $node->parentNode->removeChild($node);
}

eval.in demo

根据用户输入删除 XML 个元素

Remove XML elements based on user input

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removechild