mysql 数据库备份，恢复。。。。

mysql 数据备份，恢复,恢复没写，这里只写了备份。。。 先暂作记录吧！

备份:表结构和数据完全分开，默认有一个文件会记录所有表的结构，然后表中数据的备份 如果超过分卷的大小则会分成多个文件，不然则一个文件，参考了别人的代码，不过写的嘛，差强 人意，以后慢慢改吧。。。

代码如下：

 <?php
 /*
  * Created on 2014
  * Link for 527891885@qq.com
  * This is seocheck backup class
  */
 class DbBackUp {
     private $conn;
     private $dbName;
     private $host;
     private $tag = '_b';
     //构造方法 链接数据库
     public function __construct($host='localhost', $dbUser='root', $dbPwd='', $dbName="seocheck", $charset='utf8') {
         @ob_start();
         @set_time_limit(0);
         $this->conn = mysql_connect($host, $dbUser, $dbPwd, true);
         if(!$this->conn) die("数据库系统连接失败！");
         mysql_query("set names ".$charset, $this->conn);
         mysql_select_db($dbName, $this->conn) or die("数据库连接失败！");
         $this->host = $host;
         $this->dbName = $dbName;
     }

     //获取数据库所有表名
     public function getTableNames () {
         $tables = array();
         $result = mysql_list_tables($this->dbName, $this->conn);
         if(!$result) die('MySQL Error: ' . mysql_error());
         while($row = mysql_fetch_row($result)) {
             $tables[] = $row[0];
         }
         return $tables;
     }

     //获取数据库表的字段信息
     public function getFieldsByTable ($table) {
         $fields = array();
         $str = '';
         $res = mysql_query("SHOW CREATE TABLE `{$table}`", $this->conn);
         if(!$res) die('MySQL Error: ' . mysql_error());
         while($rows = mysql_fetch_assoc($res)) {
             $str = str_replace("CREATE TABLE `{$table}` (", "", $rows['Create Table']);//DROP TABLE IF EXISTS `{$table}`\n
             $str = "--\n-- Table structure for table `{$table}`\n--\n\nCREATE TABLE IF NOT EXISTS `{$table}` ( ".$str;
             $str = str_replace(",", ", ", $str);
             $str = str_replace("`) ) ENGINE=InnoDB ", "`)\n ) ENGINE=InnoDB ", $str);
             $str .=";\n\n";
             //$str = $str.";\n\n--\n-- Dumping data for table `{$table}`\n--\n\n";
             $fields[$rows['Table']] = $str;
         }
         return $fields;
     }

     //获取表中的数据
     public function getDataByTable($table) {
         $data = array();
         $str = '';
         $res = mysql_query("SELECT * FROM `{$table}`", $this->conn);
         if(!$res) die('MySQL Error: ' . mysql_error());
         while($rows = mysql_fetch_assoc($res)) {
             if(!empty($rows)) {
                 $data[] = $rows;
             }
         }
         $keys = array_keys($data[0]);
         foreach ($keys as $k=>$v) {
             $keys[$k] = '`'.$v.'`';
         }
         $key = join(', ', $keys);
         $str = "INSERT INTO `{$table}` ({$key}) VALUES\n";
         foreach ($data as $k=>$v) {
             $str.="(";
             while (list($key, $val) = each($v)) {
                 if(!is_numeric($val)) {
                     $str.= "'".$val."', ";
                 } else {
                     $str.= $val.', ';
                 }
             }
             $str = substr($str, 0, -2);// 后边有空格 所以从-2 开始截取
             if($k+1 == count($data)) {
                 $str.=");\n\n-- --------------------------------------------------------\n\n";
             } else {
                 $str.="),\n";
             }
         }
         return $str;
     }

      //备份数据库
     public function getBackUpDataByTable ($tables, $path='', $fileName = 'seocheck', $subsection = '2') {
         if(empty($tables)) $this->_showMsg('未能指定要备份的表!!!', true);
         $page = 0;//卷数
         $path = empty($path) ? $_SERVER['DOCUMENT_ROOT'].'/core/Runtime/Data/'.$fileName.'Demo/' : $path;
         if(!file_exists($path)) {
             mkdir($path, 0777, true);
         }
         $mysql_info = $this->_retrieve();
         $fieldsByTable = array();
         if(is_array($tables)) {
             $this->_showMsg('开始备份,数据正在初始化中,请勿关闭浏览器...');
             $fw = $this->writeFileByBackUpData($path.$this->dbName.'_table.sql', $mysql_info, $method="ab+");
             if($fw !== false) {
                 $this->_showMsg('备份数据库基本信息成功。。。');
             }
             foreach ($tables as $table) {
                 $tableInfo = $this->getFieldsByTable($table);
                 if(!empty($tableInfo)) {
                     $this->_showMsg('获取表['.$table.']结构成功。。。');
                     $fw = $this->writeFileByBackUpData($path.$this->dbName.'_table.sql', $tableInfo[$table], $method="ab+");
                     if($fw === false) {
                         $this->_showMsg('备份表['.$table.']结构失败。。。', true);
                     } else {
                         $this->_showMsg('备份表['.$table.']结构成功,开始获取数据。。。');
                     };
                 } else {
                     $this->_showMsg('获取数据库['.$this->dbName.']表结构失败,请稍后再试！。。。', true);
                 }
                 $this->_insertSqlByTableForAll($path, $table, $subsection);
             }
         } else {
             $this->_showMsg('开始备份,数据正在初始化中,请勿关闭浏览器...');
             $tableInfo = $this->getFieldsByTable($tables);
             if(!empty($tableInfo)) {
                 $this->_showMsg('获取表['.$tables.']结构成功。。。');
                 $fw = $this->writeFileByBackUpData($path.$this->dbName.'_'.$tables.'_table.sql', $mysql_info.$tableInfo[$tables]);
                 if($fw === false) {
                     $this->_showMsg('备份表['.$tables.']结构失败。。。', true);
                 } else {
                     $this->_showMsg('备份表['.$tables.']结构成功,开始获取数据。。。');
                 }
             } else {
                 $this->_showMsg('获取表['.$tables.']结构失败,请稍后再试！。。。', true);
             }
             $res = $this->_insertSqlByTableForAll($path, $tables, $subsection);
         }
     }

     //数据库基本信息
     private function _retrieve() {
         $backUp  = '';
         $backUp .= '--' . "\n";
         $backUp .= '-- MySQL database dump' . "\n";
         $backUp .= '-- Created by DbBackUp class, Power By chujiu. ' . "\n";
         $backUp .= '--' . "\n";
         $backUp .= '-- 主机: ' . $this->host . "\n";
         $backUp .= '-- 生成日期: ' . date ( 'Y' ) . ' 年  ' . date ( 'm' ) . ' 月 ' . date ( 'd' ) . ' 日 ' . date ( 'H:i' ) . "\n";
         $backUp .= '-- MySQL版本: ' . mysql_get_server_info () . "\n";
         $backUp .= '-- PHP 版本: ' . phpversion () . "\n";
         $backUp .= "\n\n";
         $backUp .= "SET SQL_MODE='NO_AUTO_VALUE_ON_ZERO';\n";
         $backUp .= "SET time_zone = '+00:00';\n\n";
         $backUp .= "/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;\n";
         $backUp .= "/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;\n";
         $backUp .= "/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;\n";
         $backUp .= "/*!40101 SET NAMES utf8*/;\n\n";
         $backUp .= "--\n-- Database: `{$this->dbName}`\n--\n\n-- --------------------------------------------------------\n\n";
         return $backUp;
     }

     /**
      * 插入单条记录
      *
      * @param string $row
      */
     private function _insertSql($row, $table) {
         // sql字段逗号分割
         $insert = '';
         $insert .= "INSERT INTO `" . $table . "` VALUES(";
         foreach($row as $key=>$val) {
             $insert .= "'".$val."',";
         }
         $insert = substr($insert, 0 ,-1);
          $insert .= ");" . "\n";
         return $insert;
     }

     /**
      * 生成一个表的inser语句
      * @param string $table
      * @param string $subsection 分卷大小
      */
     private function _insertSqlByTableForAll($path, $table, $subsection) {
         $i = 0;
         $insertSqlByTable = '';
         $res = mysql_query("SELECT * FROM `{$table}`", $this->conn);
         if(!$res) die('MySQL Error: ' . mysql_error());
         while($rows = mysql_fetch_assoc($res)) {
             $insertSqlByTable .= $this->_insertSql($rows, $table);
             $size = strlen($insertSqlByTable);
             if($size > $subsection*1024*1024) {
                 $fw = $this->writeFileByBackUpData($path.$table.$i.$this->tag.'.sql', $insertSqlByTable);
                 if($fw === false) $this->_showMsg('数据库表['.$table.'],卷 '.$i.' 写入文件失败,请稍后再试！！！',true);
                 $this->_showMsg('数据库表['.$table.'],卷 '.$i.' 备份成功！备份文件:[ '.$path.$table.$i.$this->tag.'.sql ]');
                 $insertSqlByTable = '';
                 $i+=1;
             }
         }
         // insertSqlByTable大小不够分卷大小
         if ($insertSqlByTable != "") {
             $fw = $this->writeFileByBackUpData($path.$table.$this->tag.'.sql', $insertSqlByTable);
             if($fw === false) $this->_showMsg('数据库表['.$table.']写入文件失败,请稍后再试！！！备份文件:[ '.$path.$table.$this->tag.'.sql ]',true);
             $this->_showMsg('数据库表['.$table.'] 备份成功！备份文件:[ '.$path.$table.$this->tag.'.sql ]');
         }
         $this->_showMsg('数据库表['.$table.']全部备份成功！');
     }

     // 写入文件
     public function writeFileByBackUpData($fileName, $data, $method="rb+", $iflock=1, $check=1, $chmod=1){
         $check && @strpos($fileName, '..')!==false && exit('Forbidden');
         @touch($fileName);
         $handle = @fopen($fileName, $method);
         if($iflock) {
             @flock($handle,LOCK_EX);
         }
         $fw = @fwrite($handle,$data);
         if($method == "rb+") ftruncate($handle, strlen($data));
         fclose($handle);
         $chmod && @chmod($fileName,0777);
         return $fw;
     }

     /**
      * path: 生成压缩包的路径
      * fileName : 要压缩的文件名 通常和path 同一目录
      */
     public function createZipByBackUpFile($path) {
         $db_base_files = $this->getFileByBackUpDir($path);
         if(!empty($db_base_files)) {
             $zip = new ZipArchive;
             if($zip->open($path.$this->dbName.date('Ymd').'.zip', ZipArchive::CREATE | ZIPARCHIVE::OVERWRITE) !== true)
                 die ("cannot open".$this->dbName.date('Ymd')."zip for writing.");
             foreach ($db_base_files as $key => $value) {
                 if(is_file($value)) {
                     $file_name = basename($value);
                     $info[] = $zip->addFile($value, $file_name);// 避免压缩包里有文件的路径
                 }
             }
             $zip->close();
             if(file_exists($path.$this->dbName.date('Ymd').'.zip'))
             foreach ($db_base_files as $val) {
                 unlink($val);
             }
             if(count(array_filter($info)) > 0) return true;
         }
         return false;
     }

     //获取文件
     public function getFileByBackUpDir($path) {
         $info = array();
         $db_base_files = array();
         if( @file_exists($path) && is_dir($path) ) {
             if ($dh = opendir($path)) {
                 while (($file = readdir($dh)) !== false) {
                     if($file != '.' && $file != '..') {
                         if( strripos($file, 'seocheck') !== false ) {
                             $db_base_files[] = $path.$file;
                         }
                     }
                 }
                 closedir($dh);
             }
         }
         return $db_base_files;
     }

     /**
      * @path: 生成压缩包的路径
      * @fileName : 要解压的文件名 默认解压到path 目录
      */
     public function uncompressZip($path, $zipName) {
         $path = empty($path) ? $_SERVER['DOCUMENT_ROOT'].'/core/Runtime/Data/' : $path;
         $zip = new ZipArchive;
         if ($zip->open($path.$zipName) === TRUE) {
             $zip->extractTo($path);
             $zip->close();
             return true;
         } else {
             return false;
         }
     }

     //导入数据库
     public function importingDataBySqlFile () {

     }

     //  及时输出信息
     private function _showMsg($msg,$err=false){
         if($err === true) {
             echo "<p style='font-size:14px;'><span style='color:red;'>ERROR: --- " . $msg . "</span></p>";exit;
         }
         echo "<p style='font-size:14px;'><span style='color:green;'>OK: --- " . $msg . "</span></p>";
     }

     // 锁定数据库，以免备份或导入时出错
     private function lock($table, $op = "WRITE") {
         if (mysql_query ( "lock tables " . $table . " " . $op ))
             return true;
         else
             return false;
     }

     // 解锁
     private function unlock() {
         if (mysql_query ( "unlock tables" ))
             return true;
         else
             return false;
     }

     // 析构
     public function __destruct() {
         if($this->conn){
             mysql_query ( "unlock tables", $this->conn );
             mysql_close ( $this->conn );
         }
     }
 }
 ?>