在 PHP 中更改 XML 节点元素值并保存文件
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Change XML node element value in PHP and save file
提问by Hannes
<testimonials>
<testimonial id="4c050652f0c3e">
<nimi>John</nimi>
<email>[email protected]</email>
<text>Some text</text>
<active>1</active>
</testimonial>
<testimonial id="4c05085e1cd4f">
<name>ats</name>
<email>[email protected]</email>
<text>Great site!</text>
<active>0</akctive>
</testimonial>
</testimonials>
I have this XML strcuture and i need to find a testimonial with specific id and changeits valueand save file. I have a PHP script deleting specific testimonial according its ID:
我有这个 XML 结构，我需要找到具有特定 ID 的推荐书并更改其 值并保存文件。我有一个 PHP 脚本根据其 ID 删除特定的推荐：
<?php
$xmlFile = file_get_contents('test.xml');
$xml = new SimpleXMLElement($xmlFile);
$kust_id = $_GET["id"];
foreach($xml->testimonial as $story) {
if($story['id'] == $kust_id) {
$dom=dom_import_simplexml($story);
$dom->parentNode->removeChild($dom);
$xml->asXML('test.xml');
header("Location: newfile.php");
}
}
?>
回答by VolkerK
You can use XPathto find the specific element. SimpleXMLElement->xpath()returns an array of (matching) SimpleXMLElement objects, i.e. you can access and change the data of each element just like you would in "your" foreach loop.
您可以使用XPath来查找特定元素。SimpleXMLElement->xpath()返回一个（匹配的）SimpleXMLElement 对象数组，也就是说，您可以像在“您的”foreach 循环中一样访问和更改每个元素的数据。
<?php
// $testimonials = simplexml_load_file('test.xml');
$testimonials = new SimpleXMLElement('<testimonials>
<testimonial id="4c050652f0c3e">
<nimi>John</nimi>
<email>[email protected]</email>
<text>Some text</text>
<active>1</active>
</testimonial>
<testimonial id="4c05085e1cd4f">
<name>ats</name>
<email>[email protected]</email>
<text>Great site!</text>
<active>0</active>
</testimonial>
</testimonials>');
// there can be only one item with a specific id, but foreach doesn't hurt here
foreach( $testimonials->xpath("testimonial[@id='4c05085e1cd4f']") as $t ) {
$t->name = 'LALALA';
}
echo $testimonials->asXML();
// $testimonials->asXML('test.xml');
prints
印刷
<?xml version="1.0"?>
<testimonials>
<testimonial id="4c050652f0c3e">
<nimi>John</nimi>
<email>[email protected]</email>
<text>Some text</text>
<active>1</active>
</testimonial>
<testimonial id="4c05085e1cd4f">
<name>LALALA</name>
<email>[email protected]</email>
<text>Great site!</text>
<active>0</active>
</testimonial>
</testimonials>
