本文实例讲述了PHP创建XML的方法，分享给大家供大家参考，具体如下：

使用DOMDocument类创建xml

config.php

1. <?php
2. $doc = new DOMDocument('1.0','utf-8');
3. $doc->formatOutput = true;
4. //创建标签
5. $mysql = $doc->createElement("mysql");
6. $host = $doc->createElement("host");
7. $username = $doc->createElement("username");
8. $password = $doc->createElement("password");
9. $database = $doc->createElement("database");
10. //创建标签内容
11. $hostval = $doc->createTextNode("127.0.0.1");
12. $usernameval = $doc->createTextNode("root");
13. $passwordval = $doc->createTextNode("1234");
14. $databaseval = $doc->createTextNode("test");
15. //绑定标签和内容
16. $host->appendChild($hostval);
17. $username->appendChild($usernameval);
18. $password->appendChild($passwordval);
19. $database->appendChild($databaseval);
20. //关联标签之间的关系
21. $doc->appendChild($mysql);
22. $mysql->appendChild($host);
23. $mysql->appendChild($username);
24. $mysql->appendChild($password);
25. $mysql->appendChild($database);
26. $doc->save("config.xml");

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>1234</password>
6. <database>test</database>
7. </mysql>

使用simplexml方法创建xml

config.php

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

config.xml

1. <mysql>
2. <host note="localhost">127.0.0.1</host>
3. <username>root</username>
4. <password>1234</password>
5. <database>test</database>
6. </mysql>