PHP 使用DOMDocument操作XML

<?php
$xmlpatch = 'index.xml';
$_id = '1';
$_title = 'title1';
$_content = 'content1';
$_author = 'author1';
$_sendtime = 'time1';
$_htmlpatch = '1.html';
 
$doc = new DOMDocument('1.0', 'utf-8');
$doc -> formatOutput = true;
 
$root = $doc -> createElement('root');//新建节点
 
$index = $doc -> createElement('index');//新建节点
 
$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
 
$id = $doc -> createAttribute('id');
$newsid = $doc -> createTextNode($_id);
$id -> appendChild($newsid);
 
$title = $doc -> createAttribute('title');
$newstitle = $doc -> createTextNode($_title);
$title -> appendChild($newstitle);
 
$content = $doc -> createTextNode($_content);//节点值
 
$author = $doc -> createAttribute('author');
$newsauthor = $doc -> createTextNode($_author);
$author -> appendChild($newsauthor);
 
$sendtime = $doc -> createAttribute('time');
$newssendtime = $doc -> createTextNode($_sendtime);
$sendtime -> appendChild($newssendtime);
 
$index -> appendChild($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);
 
$root -> appendChild($index);//设置index为root字节点
 
$doc -> appendChild($root);//设置root为跟节点
 
$doc -> save($xmlpatch);//保存文件
 
echo $xmlpatch . ' has create success';
 
?>

<p>
//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 -> do//cumentElement获得跟节点
</p>
 
<p>
$xmlpatch = 'index.xml';
$_id = '2';
$_title = 'title2';
$_content = 'content2';
$_author = 'author2';
$_sendtime = 'time2';
$_htmlpatch = '2.html';
</p>
 
<p>
$doc = new DOMDocument();
$doc -> formatOutput = true;
if($doc -> load($xmlpatch)) {
$root = $doc -> documentElement;//获得根节点(root)
$index = $doc -> createElement('index');
</p>
 
<p>
$url = $doc -> createAttribute('url');
$patch = $doc -> createTextNode($_htmlpatch);
$url -> appendChild($patch);
</p>
 
<p>
$id = $doc -> createAttribute('id');
$newsid = $doc -> createTextNode($_id);
$id -> appendChild($newsid);
</p>
 
<p>
$title = $doc -> createAttribute('title');
$newstitle = $doc -> createTextNode($_title);
$title -> appendChild($newstitle);
</p>
 
<p>
$content = $doc -> createTextNode($_content);
</p>
 
<p>
$author = $doc -> createAttribute('author');
$newsauthor = $doc -> createTextNode($_author);
$author -> appendChild($newsauthor);
</p>
 
<p>
$sendtime = $doc -> createAttribute('time');
$newssendtime = $doc -> createTextNode($_sendtime);
$sendtime -> appendChild($newssendtime);
</p>
 
<p>
$index -> appendChild($id);
$index -> appendChild($title);
$index -> appendChild($content);
$index -> appendChild($url);
$index -> appendChild($author);
$index -> appendChild($sendtime);
</p>
 
<p>
$root -> appendChild($index);
</p>
 
<p>
$doc -> save($xmlpatch);
</p>
 
<p>
echo $_id . ' has been added in ' . $xmlpatch;
</p>
 
<p>
} else {
echo 'xml file loaded error!';
}
</p>
 
<p>
}
</p>

//edit.php 修改功能(这里只修改title属性值 跟节点值)
 
<?php
$xmlpatch = 'index.xml';
$_id = '2';
$_title = 'has been changed';
$_content = 'has been changed';
 
$doc = new DOMDocument();
$doc -> formatOutput = true;
 
if($doc -> load($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!';
}
 
?>

//del.php 删除功能
 
<?php
$xmlpatch = 'index.xml';
$_id = '2';
 
$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!';
}
 
?>