$doc = new DOMDocument();

$doc->load("book.xml");

$books = $doc->getElementsByTagName("book");

$titles = $book->getElementsByTagName("title");

$title = $titles->item(0)->nodeValue;

<"1.0" encoding="UTF-8""htmlcode">

<"Content-type:text/html;charset=utf8");
$doc = new DOMDocument();  //创建DOMDocument对象
$doc->load("book.xml");  //打开book.xml
$books = $doc->getElementsByTagName("book"); //获取book标签对象
foreach ($books as $book){  //遍历对象
  $titles = $book->getElementsByTagName("title");  //获取book标签下的title标签
  $title = $titles->item(0)->nodeValue;  //获取标签的值
  $authors = $book->getElementsByTagName("author");//获取book标签下的author标签
  $author = $authors->item(0)->nodeValue;  //获取标签的值
  $item["title"] = $title;
  $item["author"] = $author;
  $bookinfo[] = $item;
}
var_dump($bookinfo);




实例2，读取配置文件
config.xml


<"1.0" encoding="UTF-8""htmlcode">

<"Content-type:text/html;charset=utf8");
$doc = new DOMDocument();  //创建DOMDocument对象
$doc->load("config.xml");  //打开config.xml
$mysql = $doc->getElementsByTagName("mysql"); //获取mysql标签对象
$host = $mysql->item(0)->getElementsByTagName("host");
$config["host"] = $host->item(0)->nodeValue;
$username = $mysql->item(0)->getElementsByTagName("username");
$config["username"] = $username->item(0)->nodeValue;
$password = $mysql->item(0)->getElementsByTagName("password");
$config["password"] = $password->item(0)->nodeValue;
$database = $mysql->item(0)->getElementsByTagName("database");
$config["database"] = $database->item(0)->nodeValue;
var_dump($config);




使用simplexml方法读取xml
实例1，获取图书列表
load.php


<"Content-type:text/html;charset=utf8");
$books = simplexml_load_file("book.xml");
foreach($books as $book){
  $item["title"] = $book->title;
  $item["author"] = $book->author;
  $booklist[] = $item;
}
var_dump($booklist);




实例2，读取配置文件
config.php


<"Content-type:text/html;charset=utf8");
$mysql = simplexml_load_file("config.xml");
$config['host'] = $mysql->host;
$config['username'] = $mysql->username;
$config['password'] = $mysql->password;
$config['databse'] = $mysql->database;
var_dump($config);




PS：这里再为大家提供几款关于xml操作的在线工具供大家参考使用：
在线XML/JSON互相转换工具：

http://tools.jb51.net/code/xmljson
在线格式化XML/在线压缩XML：

http://tools.jb51.net/code/xmlformat
XML在线压缩/格式化工具：

http://tools.jb51.net/code/xml_format_compress
XML代码在线格式化美化工具：

http://tools.jb51.net/code/xmlcodeformat
更多关于PHP相关内容感兴趣的读者可查看本站专题：《PHP针对XML文件操作技巧总结》、《PHP数组(Array)操作技巧大全》、《php字符串(string)用法总结》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
希望本文所述对大家PHP程序设计有所帮助。