Question

我的XML文件如下所示我使用xml作为外部文件：

<?xml version="1.0"?>
<custscales>
    <custscale sclNo="1" type="lin">
        <scaleName>Custom Scale Lin</scaleName>
        <jsfunc>custLin</jsfunc>
    </custscale>
    <custscale sclNo="2" type="map">
        <scaleName>Custome Scale Map</scaleName>
        <jsfunc>custMap</jsfunc>
    </custscale>
    <custscale sclNo="3" type="pol">
        <scaleName>Custome Scale Pol</scaleName>
        <jsfunc>custPol</jsfunc>
    </custscale>
    <custscale sclNo="4" type="tbl1">
        <scaleName>Custome Scale Table</scaleName>
        <jsfunc>custTbl1</jsfunc>
    </custscale>
</custscales>

从上面的xml文件中我只想删除sclNo =“4”的节点，我的意思是保存后节点不应该在文件中。

    <custscale sclNo="4" type="tbl1">
        <scaleName>Custome Scale Table</scaleName>
        <jsfunc>custTbl1</jsfunc>
    </custscale>

请求使用simpleXML提供示例。

Answer 1

<?php

$doc = new DOMDocument; 
$doc->load('theFile.xml');

$thedocument = $doc->documentElement;

$list = $thedocument->getElementsByTagName('custscale ');


$nodeToRemove = null;
foreach ($list as $domElement){
  $attrValue = $domElement->getAttribute('sclNo');
  if ($attrValue == '4') {
    $nodeToRemove = $domElement; //will only remember last one- but this is just an example :)
  }
}

if ($nodeToRemove != null)
$thedocument->removeChild($nodeToRemove);

echo $doc->saveXML(); 
?>

取自here

Answer 2

使用simplexml：

$xml = simplexml_load_string($x); // assume XML in $x
$i = count($xml); 

for ($i; $i > 0; $i--) {   
    $cs = $xml->custscale[$i];
    if ($cs['sclNo'] == "4") unset($xml->custscale[$i]);
}

Answer 3

要求使用simpleXML
给出示例

Remove a child with a specific attribute, in SimpleXML for PHP已详细介绍了这一点。

关键是您要将要取消设置的元素分配给变量 - 例如$element - 例如，通过使用Xpath查询（standard example）查询单个或多个节点 - 然后unsetting：

$element = $xml->xpath('/path/to/element/to[@delete = "true"]')[0];
unset($element[0]);

那已经是simplexml了。如您所见，这非常简单。一个完整的例子：

$xml = simplexml_load_string(<<<BUFFER
<path>
 <to>
   <element>
     <to delete="true" />
   </element>
 </to>
</path>
BUFFER;
);

$element = $xml->xpath('/path/to/element/to[@delete = "true"]')[0];
unset($element[0]);

$xml->asXML('php://output');

See it in action.

如何删除由属性搜索的节点及其xml中的子节点

3 个答案: