PHP
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发表于 5年以前
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阅读量:8303
本文主要介绍的是PHP对XML内容进行修改和删除的方法,下面话不多说,我们来看实例
原理图如下
示例代码
example.xml
<?xml version="1.0" encoding="utf-8"?>
<root>
<book id="1">
<title>title1</title>
</book>
<book id="2">
<title>title2</title>
</book>
<book id="3">
<title>title3</title>
</book>
<book id="4">
<title>title4</title>
</book>
<book id="5">
<title>title5</title>
</book>
</root>
首先遍历一下该xml文档
<?php $doc = new DOMDocument(); $doc->load('example.xml'); $books = $doc -> getElementsByTagName("book"); //遍历 foreach ($books as $book) { echo $book->getAttribute('id')."-"; echo $book->getElementsByTagName("title")->item(0)->nodeValue; echo "<br>"; }
运行结果为:
1-title1
2-title2
3-title3
4-title4
5-title5
修改:
<?php
$doc = new DOMDocument();
$doc->load('example.xml');
$books = $doc -> getElementsByTagName("book");
//遍历
foreach ($books as $book) {
//将id=3的title设置为33333
if($book->getAttribute('id')==3){
echo $book->getAttribute('id')."-";
echo $book->getElementsByTagName("title")->item(0)->nodeValue="33333";
echo "<br>";
}
}
//对文件做修改后,一定要记得重新sava一下,才能修改掉原文件
$doc -> save('example.xml');
修改之后为:
<?xml version="1.0" encoding="utf-8"?>
<root>
<book id="1">
<title>title1</title>
</book>
<book id="2">
<title>title2</title>
</book>
<book id="3">
<title>33333</title>
</book>
<book id="4">
<title>title4</title>
</book>
<book id="5">
<title>title5</title>
</book>
</root>
删除操作:
<?php
$doc = new DOMDocument();
$doc->load('example.xml');
$root = $doc -> documentElement;//根标签
$books = $doc -> getElementsByTagName("book");
//遍历
foreach ($books as $book) {
//将id=4的删除
if($book->getAttribute('id')==4){
$root->removeChild($book);
}
}
//对文件做修改后,一定要记得重新sava一下,才能修改掉原文件
$doc -> save('example.xml');
删除后的结果为:
<?xml version="1.0" encoding="utf-8"?>
<root>
<book id="1">
<title>title1</title>
</book>
<book id="2">
<title>title2</title>
</book>
<book id="3">
<title>33333</title>
</book>
<book id="5">
<title>title5</title>
</book>
</root>
总结
以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流。