php中实现xml与mysql数据相互转换的方法

本文实例讲述了php中实现xml与mysql数据相互转换的方法。分享给大家供大家参考。具体分析如下：

这里提供了一个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:

<?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; 

        } 

} 

?>

<?php 

$xml = new MySQL2XML(array('host'=>'localhost', 'username'=>'root', 'password'=>'', 'database'=>'mysql')); 

$xml->setTables(array('wp_term_relationships','wp_terms'));//设置备份的表 

$xml->setSaveFolder('datas/');//保存备份文件的文件夹 

$xml->toXML();//备份开始 

?>

希望本文所述对大家的php程序设计有所帮助。