本文實例講述了php中實現xml與mysql數據相互轉換的方法。分享給大家供大家參考。具體分析如下:
這裡提供了一個mysql2xml轉換類,可以快速的把xml轉換成mysql同時反之也可以把mysql轉換成xml,下面看代碼.
mysql2xml.php類文件,用於備份MySQL數據的,代碼如下:
復制代碼 代碼如下:<?php
class MySQL2XML {
protected $conn;
protected $result;
protected $tables;
protected $saveFolder = 'datas/';
public function __construct($config = NULL) {
if($config !== NULL && is_array($config)) {
$this->connect($config);
}
}
public function connect($config) {
$this->conn = mysql_connect($config['host'], $config['username'], $config['password']);
if($this->conn) {
mysql_select_db($config['database']);
return true;
}
return false;
}
public function setSaveFolder($folder) {
if(is_dir($folder)) {
$this->saveFolder = rtrim(str_replace("\", "/", $folder),'/');
return true;
}
return false;
}
public function setTables($tables) {
if(is_array($tables)) {
$this->tables = $tables;
return true;
}
return false;
}
public function query($query) {
if(!isset($query) || trim($query) == '') return false;
$this->result = mysql_query($query);
if($this->result) return true;
return false;
}
public function toXML() {
if(!isset($this->tables)) return false;
foreach($this->tables as $table) {
$file = $this->saveFolder.$table.'.xml';
$fp = @fopen($file, 'w');
if(!$fp) exit('Can not write file');
fwrite($fp, $this->tableToXML($table));
fclose($fp);
unset($fp);
}
return true;
}
public function tableToXML($table) {
header("content-type:text/xml;charset=utf-8");
$xml = "<?xml version="1.0" encoding="utf-8" ?>n<datas>n";
$fields = $this->getFields($table);
$datas = $this->getDatas($table);
$cdata = array();
foreach($datas as $data) {
foreach($data as $key => $value)
$cdata[$key][] = $value;
}
foreach($fields as $element) {
$xml .= "t<fields name="{$element['Field']}" type="{$element['Type']}" null="{$element['Null']}" key="{$element['Key']}" default="{$element['Default']}" extra="{$element['Extra']}">n";
foreach($cdata[$element['Field']] as $value) {
$xml .= "tt<data>{$value}</data>n";
}
$xml .= "t</fields>n";
}
$xml .= '</datas>';
return $xml;
}
protected function getFields($table) {
$query = "SHOW FIELDS FROM {$table}";
$this->query($query);
return $this->fetchAll();
}
protected function getDatas($table) {
$query = "SELECT * FROM {$table}";
$this->query($query);
return $this->fetchAll();
}
protected function fetch() {
if(is_resource($this->result)) {
return mysql_fetch_assoc($this->result);
}
return false;
}
protected function fetchAll() {
if(is_resource($this->result)) {
$return = array();
$row = NULL;
while($row = mysql_fetch_assoc($this->result)) {
$return[] = $row;
}
return $return;
}
return false;
}
}
?>
調用方法,代碼如下:
復制代碼 代碼如下:<?php
$xml = new MySQL2XML(array('host'=>'localhost', 'username'=>'root', 'password'=>'', 'database'=>'mysql'));
$xml->setTables(array('wp_term_relationships','wp_terms'));//設置備份的表
$xml->setSaveFolder('datas/');//保存備份文件的文件夾
$xml->toXML();//備份開始
?>
希望本文所述對大家的php程序設計有所幫助。