php中DOMDocument简单用法示例代码(XML创建、添加、删除、修改)
author:一佰互联 2019-04-30   click:163
共分四个文件,分别是创建、增加、删除、修改四个功能,变量都是写死的,改一改用$_POST方式接收就可以用了
//index.php 创建功能
复制代码 代码如下:
<?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 = $doc -> createElement("root");//新建节点
jb51.net$index = $doc -> createElement("index");//新建节点
jb51.net$url = $doc -> createAttribute("url");//新建属性
$patch = $doc -> createTextNode($_htmlpatch);//新建TEXT值
$url -> appendChild($patch);//将$patch文本设为$url属性的值
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);//节点值
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);//将$id设为index节点的属性,以下类同
$index -> appendChild($title);
$index -> appendChild($content);
$index -> appendChild($url);
$index -> appendChild($author);
$index -> appendChild($sendtime);
jb51.net$root -> appendChild($index);//设置index为root字节点
jb51.net$doc -> appendChild($root);//设置root为跟节点
jb51.net$doc -> save($xmlpatch);//保存文件
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文件差不多,主要就是加个load载入跟 $root = $doc -> documentElement获得跟节点
复制代码 代码如下:
<?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;//获得根节点(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(这里只修改title属性值 跟节点值)
复制代码 代码如下:
<?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 = $_content;//修改节点值,真是太意外了,没想到跟JS一样直接能赋值...
//$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 删除功能
复制代码 代码如下:
<?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-删除</title>
</head>
jb51.net<body>
</body>
</html>

jb51.net
总结一下,创建跟添加主要用的就是create跟appendChild,create后边跟Element就是创建节点,跟Attribute就是创建属性,TextNode就是创建值,然后appendChild就是设置从属关系,这么一看非常简单。删除与修改都是用先获得节点列表getElementsByTagName然后foreach遍历想要修改的节点.