修改：
<?php $doc = new DOMDocument(); $doc->load('example.xml');
$books = $doc -> getElementsByTagName("book");
//遍歷
foreach ($books as $book) {
//將id=3的title設(shè)置為33333
if($book->getAttribute('id')==3){
echo $book->getAttribute('id')."-";
echo $book->getElementsByTagName("title")->item(0)->nodeValue="33333";
echo "<br>";
}
}
//對(duì)文件做修改后，一定要記得重新sava一下，才能修改掉原文件
$doc -> save('example.xml');
修改之后為：
<?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>
刪除操作：
<?php $doc = new DOMDocument();
$doc->load('example.xml');
$root = $doc -> documentElement;
//根標(biāo)簽
$books = $doc -> getElementsByTagName("book");
//遍歷
foreach ($books as $book) {
//將id=4的刪除
if($book->getAttribute('id')==4){
$root->removeChild($book);
}
} //對(duì)文件做修改后，一定要記得重新sava一下，才能修改掉原文件
$doc -> save('example.xml');
刪除后的結(jié)果為：
<?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>
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