Introduction to the method of adding, deleting, modifying and checking xml files in PHP

This article mainly introduces the implementation method of PHP's addition, deletion, modification and query operations on XML files. It analyzes the loading of XML files by PHP and the reading, modification, query and other related operation skills of XML nodes based on specific examples. It needs Friends can refer to the following

The example of this article describes the implementation method of adding, deleting, modifying and checking xml files in PHP. Share it with everyone for your reference, the details are as follows:

xml source file

<?xml version="1.0" encoding="utf-8"?>
<root>
 <endTime>2016-08-01</endTime>
 <content>文件内容</content>
</root>

$file='callBoard.xml';

Query xml:

$doc=new DOMDocument();//实例化对像
$doc->load($file);//载入文件
$data=array();
$time=$doc->getElementsByTagName("endTime");//获取元素是title
$dateTime=$time->item(0)->nodeValue;//对指定元素获取值
$content=$doc->getElementsByTagName("content");//获取元素是title
$dataContent=$content->item(0)->nodeValue;//对指定元素获取值

Updates and creations:

if(file_exists($file))//判断文件是否存在
{
   //如果存在就更新内容
   $doc=new DOMDocument();//实例化对像
   $doc->load($file);//载入文件
   $resultDate=$doc->getElementsByTagName("endTime");//获取元素是dateNumber
   $resultDate->item(0)->nodeValue=$_POST['time'];//对指定元素赋值
   $resultBall1=$doc->getElementsByTagName("content");//获取元素是ball1
   $resultBall1->item(0)->nodeValue=$_POST['content'];//对指定元素赋值
   $doc->save($file);//当有用到修改时才用此方法
}
else
{
   //如果不存在就创建文件
   $doc=new DOMDocument('1.0','utf-8');//申明是XML
   $doc->formatOutput=true;//格式输出
   $root=$doc->createElement('root');//创建根元素
   $endTime=$doc->createElement("endTime",$_POST['time']);//创建元素dateNumber 并赋值$arr['resultDate']内容
   $content=$doc->createElement("content",$_POST['content']);//创建元素ball1 并赋值$arr['resultBall1']内容
   $root->appendChild($endTime);//$content元素包含$dateNumber元素
   $root->appendChild($content);//$content元素包含$ball1元素
   $doc->appendChild($root);//结束建立根元索
   $doc->save($file);//生成xml.xml文件
}

The above is the detailed content of Introduction to the method of adding, deleting, modifying and checking xml files in PHP. For more information, please follow other related articles on the PHP Chinese website!