Simple usage example code of DOMDocument in php (XML creation, addition, deletion, modification)

Simple usage example code of DOMDocument in php (XML creation, addition, deletion, modification)_PHP tutorial

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Release： 2016-07-21 15:32:44

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It is divided into four files, which have four functions: create, add, delete and modify. The variables are all hard-coded. You can use $_POST instead to receive them
//index.php creation function

Copy code The code is as follows:

$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 = $doc -> createElement('root');//New node
jb51.net$index = $doc -> createElement('index');//New node
jb51.net$ url = $doc -> createAttribute('url');//New attribute
$patch = $doc -> createTextNode($_htmlpatch);//New TEXT value
$url -> appendChild( $patch);//Set the $patch text to the value of the $url attribute
jb51.net$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);//Node value
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);//Set $id as the attribute of the index node, the following is similar to
$index -> appendChild($title);
$index -> appendChild($content);
$index -> appendChild($url);
$index -> appendChild($author);
$index -> appendChild($sendtime) ;
jb51.net$root -> appendChild($index);//Set index as the root byte point
jb51.net$doc -> appendChild($root);//Set root as the follow Node
jb51.net$doc -> save($xmlpatch);//Save the file
jb51.netecho $xmlpatch . ' has create success';
jb51.net?>
jb51 .net

XML operation

jb51.net

//add.php adds functions (similar to the index.php file, mainly adding a load and $root = $doc -> documentElement to get the following Node

Copy code The code is as follows:

$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!';
}
?>

XML操作-添加

jb51.net

//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:

$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?>

XML操作-修改

jb51.net

//del.php 删除功能

复制代码代码如下:

$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?>

XML操作-删除

jb51.net

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.