PHP创建XML的方法示例【基于DOMDocument类及SimpleXMLElement类】

<?php
$doc = new DOMDocument('1.0','utf-8');
$doc- formatOutput = true;
//创建标签
$mysql = $doc- createElement("mysql");
$host = $doc- createElement("host");
$username = $doc- createElement("username");
$password = $doc- createElement("password");
$database = $doc- createElement("database");
//创建标签内容
$hostval = $doc- createTextNode("127.0.0.1");
$usernameval = $doc- createTextNode("root");
$passwordval = $doc- createTextNode("1234");
$databaseval = $doc- createTextNode("test");
//绑定标签和内容
$host- appendChild($hostval);
$username- appendChild($usernameval);
$password- appendChild($passwordval);
$database- appendChild($databaseval);
//关联标签之间的关系
$doc- appendChild($mysql);
$mysql- appendChild($host);
$mysql- appendChild($username);
$mysql- appendChild($password);
$mysql- appendChild($database);
$doc- save("config.xml");

<?xml version="1.0" encoding="utf-8"? 
<mysql 
 <host 127.0.0.1</host 
 <username root</username 
 <password 1234</password 
 <database test</database 
</mysql 

<?php
$mysql = new SimpleXMLElement('<?xml version="1.0" encoding="utf-8"? <mysql </mysql ');
$host = $mysql- addchild("host","127.0.0.1");
$host- addAttribute("note","localhost");
$mysql- addchild("username","root");
$mysql- addchild("password","1234");
$mysql- addchild("database","test");
header("Content-type:text/xml;charset=utf-8");
echo $mysql- asXml();
$mysql- asXml("config.xml");

<mysql 
<host note="localhost" 127.0.0.1</host 
<username root</username 
<password 1234</password 
<database test</database 
</mysql