php中实现xml与mysql数据相互转换代码

本文章提供了一个mysql2xml转换类,可以快速的把xml转换成mysql同时反之也可以把mysql转换成xml,下面看代码.

mysql2xml.php类文件,用于备份MySQL数据的,代码如下:

1. <?php 
2. class MySQL2XML { 
3.         protected $conn; 
4.         protected $result; 
5.         protected $tables; 
6.         protected $saveFolder = 'datas/'; 
7.          
8.         public function __construct($config = NULL) { 
9.                 if($config !== NULL && is_array($config)) { 
10.                         $this->connect($config); 
11.                 } 
12.         } 
13.          
14.         public function connect($config) { 
15.                 $this->conn = mysql_connect($config['host'], $config['username'], $config['password']); 
16.                 if($this->conn) { 
17.                         mysql_select_db($config['database']); 
18.                         return true; 
19.                 } 
20.                 return false; 
21.         } 
22.          
23.         public function setSaveFolder($folder) { 
24.                 if(is_dir($folder)) { 
25.                         $this->saveFolder = rtrim(str_replace("\", "/", $folder),'/'); 
26.                         return true; 
27.                 } 
28.                 return false; 
29.         } 
30.          
31.         public function setTables($tables) { 
32.                 if(is_array($tables)) { 
33.                         $this->tables = $tables; 
34.                         return true; 
35.                 } 
36.                 return false; 
37.         } 
38.          
39.         public function query($query) { 
40.                 if(!isset($query) || trim($query) == '') return false; 
41.                 $this->result = mysql_query($query); 
42.                 if($this->result) return true; 
43.                 return false; 
44.         } 
45.          
46.         public function toXML() { 
47.                 if(!isset($this->tables)) return false; 
48.                 foreach($this->tables as $table) { 
49.                         $file = $this->saveFolder.$table.'.xml'; 
50.                         $fp = @fopen($file, 'w'); 
51.                         if(!$fp) exit('Can not write file'); 
52.                         fwrite($fp, $this->tableToXML($table)); 
53.                         fclose($fp); 
54.                         unset($fp); 
55.                 } 
56.                 return true; 
57.         } 
58.          
59.         public function tableToXML($table) { 
60.                 header("content-type:text/xml;charset=utf-8"); 
61.                 $xml = "<?xml version="1.0" encoding="utf-8" ?>n<datas>n"; 
62.                 $fields = $this->getFields($table); 
63.                 $datas = $this->getDatas($table); 
64.                 $cdata = array(); 
65.                 foreach($datas as $data) { 
66.                         foreach($data as $key => $value) 
67.                                 $cdata[$key][] = $value; 
68.                 } 
69.                 foreach($fields as $element) { 
70.                         $xml .= "t<fields name="{$element['Field']}" type="{$element['Type']}" null="{$element['Null']}" key="{$element['Key']}" default="{$element['Default']}" extra="{$element['Extra']}">n"; 
71.                         foreach($cdata[$element['Field']] as $value) { 
72.                                 $xml .= "tt<data>{$value}</data>n"; 
73.                         } 
74.                         $xml .= "t</fields>n"; 
75.                 } 
76.                 $xml .= '</datas>'; 
77.                 return $xml; 
78.         } 
79.          
80.         protected function getFields($table) { 
81.                 $query = "SHOW FIELDS FROM {$table}"; 
82.                 $this->query($query); 
83.                 return $this->fetchAll(); 
84.         }//开源代码phpfensi.com 
85.          
86.         protected function getDatas($table) { 
87.                 $query = "SELECT * FROM {$table}"; 
88.                 $this->query($query); 
89.                 return $this->fetchAll(); 
90.         } 
91.          
92.         protected function fetch() { 
93.                 if(is_resource($this->result)) { 
94.                         return mysql_fetch_assoc($this->result); 
95.                 } 
96.                 return false; 
97.         } 
98.          
99.         protected function fetchAll() { 
100.                 if(is_resource($this->result)) { 
101.                         $return = array(); 
102.                         $row = NULL; 
103.                         while($row = mysql_fetch_assoc($this->result)) { 
104.                                 $return[] = $row; 
105.                         } 
106.                         return $return; 
107.                 } 
108.                 return false; 
109.         } 
110. } 
111. ?> 

调用方法,代码如下:

1. <?php 
2. $xml = new MySQL2XML(array('host'=>'localhost', 'username'=>'root', 'password'=>'', 'database'=>'mysql')); 
3. $xml->setTables(array('wp_term_relationships','wp_terms'));//设置备份的表 
4. $xml->setSaveFolder('datas/');//保存备份文件的文件夹 
5. $xml->toXML();//备份开始 
6. ?>