php中DOMDocument简单用法示例代码(XML创建、添加、删除、修改)

  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';

  glzy8.com$doc = new DOMDocument('1.0', 'utf-8');

  $doc -> formatOutput = true;

  glzy8.com$root = $doc -> createElement('root');//新建节点

  glzy8.com$index = $doc -> createElement('index');//新建节点

  glzy8.com$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

  glzy8.com$id = $doc -> createAttribute('id');

  $newsid = $doc -> createTextNode($_id);

  $id -> appendChild($newsid);

  glzy8.com$title = $doc -> createAttribute('title');

  $newstitle = $doc -> createTextNode($_title);

  $title -> appendChild($newstitle);

  glzy8.com$content = $doc -> createTextNode($_content);//节点值

  glzy8.com$author = $doc -> createAttribute('author');

  $newsauthor = $doc -> createTextNode($_author);

  $author -> appendChild($newsauthor);

  glzy8.com$sendtime = $doc -> createAttribute('time');

  $newssendtime = $doc -> createTextNode($_sendtime);

  $sendtime -> appendChild($newssendtime);

  glzy8.com$index -> appendChild($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);

  glzy8.com$root -> appendChild($index);//设置index为root字节点

  glzy8.com$doc -> appendChild($root);//设置root为跟节点

  glzy8.com$doc -> save($xmlpatch);//保存文件

  glzy8.comecho $xmlpatch . ' has create success';

  glzy8.com?>

  glzy8.com<!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>

  glzy8.com<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';

  glzy8.com$doc = new DOMDocument();

  $doc -> formatOutput = true;

  if($doc -> load($xmlpatch)) {

  $root = $doc -> documentElement;//获得根节点(root)

  $index = $doc -> createElement('index');

  glzy8.com$url = $doc -> createAttribute('url');

  $patch = $doc -> createTextNode($_htmlpatch);

  $url -> appendChild($patch);

  glzy8.com$id = $doc -> createAttribute('id');

  $newsid = $doc -> createTextNode($_id);

  $id -> appendChild($newsid);

  glzy8.com$title = $doc -> createAttribute('title');

  $newstitle = $doc -> createTextNode($_title);

  $title -> appendChild($newstitle);

  glzy8.com$content = $doc -> createTextNode($_content);

  glzy8.com$author = $doc -> createAttribute('author');

  $newsauthor = $doc -> createTextNode($_author);

  $author -> appendChild($newsauthor);

  glzy8.com$sendtime = $doc -> createAttribute('time');

  $newssendtime = $doc -> createTextNode($_sendtime);

  $sendtime -> appendChild($newssendtime);

  glzy8.com$index -> appendChild($id);

  $index -> appendChild($title);

  $index -> appendChild($content);

  $index -> appendChild($url);

  $index -> appendChild($author);

  $index -> appendChild($sendtime);

  glzy8.com$root -> appendChild($index);

  glzy8.com$doc -> save($xmlpatch);

  glzy8.comecho $_id . ' has been added in ' . $xmlpatch;

  glzy8.com} 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>

  glzy8.com<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';

  glzy8.com$doc = new DOMDocument();

  $doc -> formatOutput = true;

  glzy8.comif($doc -> load($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!';

  }

  glzy8.com?>

  <!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>

  glzy8.com<body>

  </body>

  </html>

  //del.php 删除功能

  

复制代码 代码如下:

  <?php

  $xmlpatch = 'index.xml';

  $_id = '2';

  glzy8.com$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!';

  }

  glzy8.com?>

  <!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>

  glzy8.com<body>

  </body>

  </html>

  glzy8.com

  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.