本文实例讲述了PHP读取XML文件的方法，分享给大家供大家参考，具体如下：

使用DOMDocument对象读取xml

创建一个DOMDocument对象

$doc = new DOMDocument();

载入xml文件

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

获取标签对象

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

获取标签的子对象

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

获取标签的值或属性

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

实例1，获取图书列表

book.xml

1. <?xml version="1.0" encoding="UTF-8"?>
2. <bookstore>
3. <book>
4. <title>PHP和MySQL开发</title>
5. <author>谭浩强</author>
6. </book>
7. <book>
8. <titile>xml从入门到精通</titile>
9. <author>郑智化</author>
10. </book>
11. </bookstore>

load.php

1. <?php
2. header("Content-type:text/html;charset=utf8");
3. $doc = new DOMDocument(); //创建DOMDocument对象
4. $doc->load("book.xml"); //打开book.xml
5. $books = $doc->getElementsByTagName("book"); //获取book标签对象
6. foreach ($books as $book){ //遍历对象
7. $titles = $book->getElementsByTagName("title"); //获取book标签下的title标签
8. $title = $titles->item(0)->nodeValue; //获取标签的值
9. $authors = $book->getElementsByTagName("author");//获取book标签下的author标签
10. $author = $authors->item(0)->nodeValue; //获取标签的值
11. $item["title"] = $title;
12. $item["author"] = $author;
13. $bookinfo[] = $item;
14. }
15. var_dump($bookinfo);

实例2，读取配置文件

config.xml

1. <?xml version="1.0" encoding="UTF-8"?>
2. <mysql>
3. <host>127.0.0.1</host>
4. <username>root</username>
5. <password></password>
6. <database>test</database>
7. </mysql>

config.php

1. <?php
2. header("Content-type:text/html;charset=utf8");
3. $doc = new DOMDocument(); //创建DOMDocument对象
4. $doc->load("config.xml"); //打开config.xml
5. $mysql = $doc->getElementsByTagName("mysql"); //获取mysql标签对象
6. $host = $mysql->item(0)->getElementsByTagName("host");
7. $config["host"] = $host->item(0)->nodeValue;
8. $username = $mysql->item(0)->getElementsByTagName("username");
9. $config["username"] = $username->item(0)->nodeValue;
10. $password = $mysql->item(0)->getElementsByTagName("password");
11. $config["password"] = $password->item(0)->nodeValue;
12. $database = $mysql->item(0)->getElementsByTagName("database");
13. $config["database"] = $database->item(0)->nodeValue;
14. var_dump($config);

使用simplexml方法读取xml

实例1，获取图书列表

load.php

1. <?php
2. header("Content-type:text/html;charset=utf8");
3. $books = simplexml_load_file("book.xml");
4. foreach($books as $book){
5. $item["title"] = $book->title;
6. $item["author"] = $book->author;
7. $booklist[] = $item;
8. }
9. var_dump($booklist);

实例2，读取配置文件

config.php

1. <?php
2. header("Content-type:text/html;charset=utf8");
3. $mysql = simplexml_load_file("config.xml");
4. $config['host'] = $mysql->host;
5. $config['username'] = $mysql->username;
6. $config['password'] = $mysql->password;
7. $config['databse'] = $mysql->database;
8. var_dump($config);