php中DOMDocument簡單用法範例程式碼(XML建立、添加、刪除、修改)

最後更新：2018-12-08 來源：互聯網

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共分四個檔案，分別是建立、增加、刪除、修改四個功能，變數都是寫死的，改一改用$_POST方式接收就可以用了
//index.php 建立功能複製代碼代碼如下:<?php
$xmlpatch = 'index.xml';
$_id = '1';
$_title = 'title1';
$_content = 'content1';
$_author = 'author1';
$_sendtime = 'time1';
$_htmlpatch = '1.html';
jb51.net$doc = new DOMDocument('1.0', 'utf-8');
$doc -> formatOutput = true;
jb51.net$root = $doc -> createElement('root');//建立節點
jb51.net$index = $doc -> createElement('index');//建立節點
jb51.net$url = $doc -> createAttribute('url');//建立屬性
$patch = $doc -> createTextNode($_htmlpatch);//建立TEXT值
$url -> appendChild($patch);//將$patch文本設為$url屬性的值
jb51.net$id = $doc -> createAttribute('id');
$newsid = $doc -> createTextNode($_id);
$id -> appendChild($newsid);
jb51.net$title = $doc -> createAttribute('title');
$newstitle = $doc -> createTextNode($_title);
$title -> appendChild($newstitle);
jb51.net$content = $doc -> createTextNode($_content);//節點值
jb51.net$author = $doc -> createAttribute('author');
$newsauthor = $doc -> createTextNode($_author);
$author -> appendChild($newsauthor);
jb51.net$sendtime = $doc -> createAttribute('time');
$newssendtime = $doc -> createTextNode($_sendtime);
$sendtime -> appendChild($newssendtime);
jb51.net$index -> appendChild($id);//將$id設為index節點的屬性，以下類同
$index -> appendChild($title);
$index -> appendChild($content);
$index -> appendChild($url);
$index -> appendChild($author);
$index -> appendChild($sendtime);
jb51.net$root -> appendChild($index);//設定index為root位元組點
jb51.net$doc -> appendChild($root);//設定root為跟節點
jb51.net$doc -> save($xmlpatch);//儲存檔案
jb51.netecho $xmlpatch . ' has create success';
jb51.net?>
jb51.net<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>XML操作</title>
</head>
jb51.net<body>
</body>
</html>

//add.php 增加功能(跟index.php檔案差不多，主要就是加個load載入跟 $root = $doc -> documentElement獲得跟節點複製代碼代碼如下:<?php
$xmlpatch = 'index.xml';
$_id = '2';
$_title = 'title2';
$_content = 'content2';
$_author = 'author2';
$_sendtime = 'time2';
$_htmlpatch = '2.html';
jb51.net$doc = new DOMDocument();
$doc -> formatOutput = true;
if($doc -> load($xmlpatch)) {
$root = $doc -> documentElement;//獲得根節點(root)
$index = $doc -> createElement('index');
jb51.net$url = $doc -> createAttribute('url');
$patch = $doc -> createTextNode($_htmlpatch);
$url -> appendChild($patch);
jb51.net$id = $doc -> createAttribute('id');
$newsid = $doc -> createTextNode($_id);
$id -> appendChild($newsid);
jb51.net$title = $doc -> createAttribute('title');
$newstitle = $doc -> createTextNode($_title);
$title -> appendChild($newstitle);
jb51.net$content = $doc -> createTextNode($_content);
jb51.net$author = $doc -> createAttribute('author');
$newsauthor = $doc -> createTextNode($_author);
$author -> appendChild($newsauthor);
jb51.net$sendtime = $doc -> createAttribute('time');
$newssendtime = $doc -> createTextNode($_sendtime);
$sendtime -> appendChild($newssendtime);
jb51.net$index -> appendChild($id);
$index -> appendChild($title);
$index -> appendChild($content);
$index -> appendChild($url);
$index -> appendChild($author);
$index -> appendChild($sendtime);
jb51.net$root -> appendChild($index);
jb51.net$doc -> save($xmlpatch);
jb51.netecho $_id . ' has been added in ' . $xmlpatch;
jb51.net} else {
echo 'xml file loaded error!';
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>XML操作-添加</title>
</head>
jb51.net<body>
</body>
</html>

//edit.php 修改功能(這裡只修改title屬性值跟節點值) 複製代碼代碼如下:<?php
$xmlpatch = 'index.xml';
$_id = '2';
$_title = 'has been changed';
$_content = 'has been changed';
jb51.net$doc = new DOMDocument();
$doc -> formatOutput = true;
jb51.netif($doc -> load($xmlpatch)) {
$root = $doc -> documentElement;
$elm = $root -> getElementsByTagName('index');
$checkexist = 0;
foreach ($elm as $new) {
if($new -> getAttribute('id') == $_id) {
$new -> setAttribute('title', $_title);
$new -> nodeValue = $_content;//修改節點值，真是太意外了，沒想到跟JS一樣直接能賦值...
//$new -> removeChild($new -> nodevalue);
$checkexist = 1;
}
}
if($checkexist == 0) {
echo $_id . ' is not found in ' . $xmlpatch;
} else {
$doc -> save($xmlpatch);
echo $_id . ' has been changed';
}
} else {
echo 'xml file loaded error!';
}
jb51.net?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>XML操作-修改</title>
</head>
jb51.net<body>
</body>
</html>

//del.php 刪除功能複製代碼代碼如下:<?php
$xmlpatch = 'index.xml';
$_id = '2';
jb51.net$doc = new DOMDocument();
$doc -> formatOutput = true;
if($doc -> load($xmlpatch)) {
$root = $doc -> documentElement;
$elm = $root -> getElementsByTagName('index');
foreach ($elm as $new) {
if($new -> getAttribute('id') == $_id) {
if($root -> removeChild($new)) {
echo $_id . ' has been deleted';
} else {
echo $_id . ' delete failed';
}
}
}
$doc -> save($xmlpatch);
} else {
echo 'xml file loaded error!';
}
jb51.net?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>XML操作-刪除</title>
</head>
jb51.net<body>
</body>
</html>

jb51.net
總結一下，建立跟添加主要用的就是create跟appendChild，create後邊跟Element就是建立節點，跟Attribute就是建立屬性，TextNode就是建立值，然後appendChild就是設定從屬關係，這麼一看非常簡單。刪除與修改都是用先獲得節點列表getElementsByTagName然後foreach遍曆想要修改的節點.

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