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：

  1 <?php

  2 /*

  3  * Created on 2014

  4  * Link for [email protected]

  5  * This is seocheck backup class

  6  */

  7 class DbBackUp {

  8     private $conn;

  9     private $dbName;

 10     private $host;

 11     private $tag = '_b';

 12     //构造方法 链接数据库

 13     public function __construct($host='localhost', $dbUser='root', $dbPwd='', $dbName="seocheck", $charset='utf8') {

 14         @ob_start();

 15         @set_time_limit(0);

 16         $this->conn = mysql_connect($host, $dbUser, $dbPwd, true);

 17         if(!$this->conn) die("数据库系统连接失败！");

 18         mysql_query("set names ".$charset, $this->conn);

 19         mysql_select_db($dbName, $this->conn) or die("数据库连接失败！");

 20         $this->host = $host;

 21         $this->dbName = $dbName;

 22     }

 23 

 24     //获取数据库所有表名

 25     public function getTableNames () {

 26         $tables = array();

 27         $result = mysql_list_tables($this->dbName, $this->conn);

 28         if(!$result) die('MySQL Error: ' . mysql_error());

 29         while($row = mysql_fetch_row($result)) {

 30             $tables[] = $row[0];

 31         }

 32         return $tables;

 33     }

 34 

 35     //获取数据库表的字段信息

 36     public function getFieldsByTable ($table) {

 37         $fields = array();

 38         $str = '';

 39         $res = mysql_query("SHOW CREATE TABLE `{$table}`", $this->conn);

 40         if(!$res) die('MySQL Error: ' . mysql_error());

 41         while($rows = mysql_fetch_assoc($res)) {

 42             $str = str_replace("CREATE TABLE `{$table}` (", "", $rows['Create Table']);//DROP TABLE IF EXISTS `{$table}`\n

 43             $str = "--\n-- Table structure for table `{$table}`\n--\n\nCREATE TABLE IF NOT EXISTS `{$table}` ( ".$str;

 44             $str = str_replace(",", ", ", $str);

 45             $str = str_replace("`) ) ENGINE=InnoDB ", "`)\n ) ENGINE=InnoDB ", $str);

 46             $str .=";\n\n";

 47             //$str = $str.";\n\n--\n-- Dumping data for table `{$table}`\n--\n\n";

 48             $fields[$rows['Table']] = $str;

 49         }

 50         return $fields;

 51     }

 52 

 53     //获取表中的数据

 54     public function getDataByTable($table) {

 55         $data = array();

 56         $str = '';

 57         $res = mysql_query("SELECT * FROM `{$table}`", $this->conn);

 58         if(!$res) die('MySQL Error: ' . mysql_error());

 59         while($rows = mysql_fetch_assoc($res)) {

 60             if(!empty($rows)) {

 61                 $data[] = $rows;

 62             }

 63         }

 64         $keys = array_keys($data[0]);

 65         foreach ($keys as $k=>$v) {

 66             $keys[$k] = '`'.$v.'`';

 67         }

 68         $key = join(', ', $keys);

 69         $str = "INSERT INTO `{$table}` ({$key}) VALUES\n";

 70         foreach ($data as $k=>$v) {

 71             $str.="(";

 72             while (list($key, $val) = each($v)) {

 73                 if(!is_numeric($val)) {

 74                     $str.= "'".$val."', ";

 75                 } else {

 76                     $str.= $val.', ';

 77                 }

 78             }

 79             $str = substr($str, 0, -2);// 后边有空格 所以从-2 开始截取

 80             if($k+1 == count($data)) {

 81                 $str.=");\n\n-- --------------------------------------------------------\n\n";

 82             } else {

 83                 $str.="),\n";

 84             }

 85         }

 86         return $str;

 87     }

 88 

 89      //备份数据库

 90     public function getBackUpDataByTable ($tables, $path='', $fileName = 'seocheck', $subsection = '2') {

 91         if(empty($tables)) $this->_showMsg('未能指定要备份的表!!!', true);

 92         $page = 0;//卷数

 93         $path = empty($path) ? $_SERVER['DOCUMENT_ROOT'].'/core/Runtime/Data/'.$fileName.'Demo/' : $path;

 94         if(!file_exists($path)) {

 95             mkdir($path, 0777, true);

 96         }

 97         $mysql_info = $this->_retrieve();

 98         $fieldsByTable = array();

 99         if(is_array($tables)) {

100             $this->_showMsg('开始备份,数据正在初始化中,请勿关闭浏览器...');

101             $fw = $this->writeFileByBackUpData($path.$this->dbName.'_table.sql', $mysql_info, $method="ab+");

102             if($fw !== false) {

103                 $this->_showMsg('备份数据库基本信息成功。。。');

104             }

105             foreach ($tables as $table) {

106                 $tableInfo = $this->getFieldsByTable($table);

107                 if(!empty($tableInfo)) {

108                     $this->_showMsg('获取表['.$table.']结构成功。。。');

109                     $fw = $this->writeFileByBackUpData($path.$this->dbName.'_table.sql', $tableInfo[$table], $method="ab+");

110                     if($fw === false) {

111                         $this->_showMsg('备份表['.$table.']结构失败。。。', true);

112                     } else {

113                         $this->_showMsg('备份表['.$table.']结构成功,开始获取数据。。。');

114                     };

115                 } else {

116                     $this->_showMsg('获取数据库['.$this->dbName.']表结构失败,请稍后再试！。。。', true);

117                 }

118                 $this->_insertSqlByTableForAll($path, $table, $subsection);

119             }

120         } else {

121             $this->_showMsg('开始备份,数据正在初始化中,请勿关闭浏览器...');

122             $tableInfo = $this->getFieldsByTable($tables);

123             if(!empty($tableInfo)) {

124                 $this->_showMsg('获取表['.$tables.']结构成功。。。');

125                 $fw = $this->writeFileByBackUpData($path.$this->dbName.'_'.$tables.'_table.sql', $mysql_info.$tableInfo[$tables]);

126                 if($fw === false) {

127                     $this->_showMsg('备份表['.$tables.']结构失败。。。', true);

128                 } else {

129                     $this->_showMsg('备份表['.$tables.']结构成功,开始获取数据。。。');

130                 }

131             } else {

132                 $this->_showMsg('获取表['.$tables.']结构失败,请稍后再试！。。。', true);

133             }

134             $res = $this->_insertSqlByTableForAll($path, $tables, $subsection);

135         }

136     }

137 

138     //数据库基本信息

139     private function _retrieve() {

140         $backUp  = '';

141         $backUp .= '--' . "\n";

142         $backUp .= '-- MySQL database dump' . "\n";

143         $backUp .= '-- Created by DbBackUp class, Power By chujiu. ' . "\n";

144         $backUp .= '--' . "\n";

145         $backUp .= '-- 主机: ' . $this->host . "\n";

146         $backUp .= '-- 生成日期: ' . date ( 'Y' ) . ' 年  ' . date ( 'm' ) . ' 月 ' . date ( 'd' ) . ' 日 ' . date ( 'H:i' ) . "\n";

147         $backUp .= '-- MySQL版本: ' . mysql_get_server_info () . "\n";

148         $backUp .= '-- PHP 版本: ' . phpversion () . "\n";

149         $backUp .= "\n\n";

150         $backUp .= "SET SQL_MODE='NO_AUTO_VALUE_ON_ZERO';\n";

151         $backUp .= "SET time_zone = '+00:00';\n\n";

152         $backUp .= "/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;\n";

153         $backUp .= "/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;\n";

154         $backUp .= "/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;\n";

155         $backUp .= "/*!40101 SET NAMES utf8*/;\n\n";

156         $backUp .= "--\n-- Database: `{$this->dbName}`\n--\n\n-- --------------------------------------------------------\n\n";

157         return $backUp;

158     }

159 

160     /**

161      * 插入单条记录

162      *

163      * @param string $row

164      */

165     private function _insertSql($row, $table) {

166         // sql字段逗号分割

167         $insert = '';

168         $insert .= "INSERT INTO `" . $table . "` VALUES(";

169         foreach($row as $key=>$val) {

170             $insert .= "'".$val."',";

171         }

172         $insert = substr($insert, 0 ,-1);

173          $insert .= ");" . "\n";

174         return $insert;

175     }

176 

177     /**

178      * 生成一个表的inser语句

179      * @param string $table

180      * @param string $subsection 分卷大小

181      */

182     private function _insertSqlByTableForAll($path, $table, $subsection) {

183         $i = 0;

184         $insertSqlByTable = '';

185         $res = mysql_query("SELECT * FROM `{$table}`", $this->conn);

186         if(!$res) die('MySQL Error: ' . mysql_error());

187         while($rows = mysql_fetch_assoc($res)) {

188             $insertSqlByTable .= $this->_insertSql($rows, $table);

189             $size = strlen($insertSqlByTable);

190             if($size > $subsection*1024*1024) {

191                 $fw = $this->writeFileByBackUpData($path.$table.$i.$this->tag.'.sql', $insertSqlByTable);

192                 if($fw === false) $this->_showMsg('数据库表['.$table.'],卷 '.$i.' 写入文件失败,请稍后再试！！！',true);

193                 $this->_showMsg('数据库表['.$table.'],卷 '.$i.' 备份成功！备份文件:[ '.$path.$table.$i.$this->tag.'.sql ]');

194                 $insertSqlByTable = '';

195                 $i+=1;

196             }

197         }

198         // insertSqlByTable大小不够分卷大小

199         if ($insertSqlByTable != "") {

200             $fw = $this->writeFileByBackUpData($path.$table.$this->tag.'.sql', $insertSqlByTable);

201             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);

202             $this->_showMsg('数据库表['.$table.'] 备份成功！备份文件:[ '.$path.$table.$this->tag.'.sql ]');

203         }

204         $this->_showMsg('数据库表['.$table.']全部备份成功！');

205     }

206 

207     // 写入文件

208     public function writeFileByBackUpData($fileName, $data, $method="rb+", $iflock=1, $check=1, $chmod=1){

209         $check && @strpos($fileName, '..')!==false && exit('Forbidden');

210         @touch($fileName);

211         $handle = @fopen($fileName, $method);

212         if($iflock) {

213             @flock($handle,LOCK_EX);

214         }

215         $fw = @fwrite($handle,$data);

216         if($method == "rb+") ftruncate($handle, strlen($data));

217         fclose($handle);

218         $chmod && @chmod($fileName,0777);

219         return $fw;

220     }

221 

222     /**

223      * path: 生成压缩包的路径

224      * fileName : 要压缩的文件名 通常和path 同一目录

225      */

226     public function createZipByBackUpFile($path) {

227         $db_base_files = $this->getFileByBackUpDir($path);

228         if(!empty($db_base_files)) {

229             $zip = new ZipArchive;

230             if($zip->open($path.$this->dbName.date('Ymd').'.zip', ZipArchive::CREATE | ZIPARCHIVE::OVERWRITE) !== true) 

231                 die ("cannot open".$this->dbName.date('Ymd')."zip for writing.");

232             foreach ($db_base_files as $key => $value) {

233                 if(is_file($value)) {

234                     $file_name = basename($value);

235                     $info[] = $zip->addFile($value, $file_name);// 避免压缩包里有文件的路径

236                 }

237             }

238             $zip->close();

239             if(file_exists($path.$this->dbName.date('Ymd').'.zip'))

240             foreach ($db_base_files as $val) {

241                 unlink($val);

242             }

243             if(count(array_filter($info)) > 0) return true;

244         }

245         return false;

246     }

247 

248     //获取文件

249     public function getFileByBackUpDir($path) {

250         $info = array();

251         $db_base_files = array();

252         if( @file_exists($path) && is_dir($path) ) {

253             if ($dh = opendir($path)) {

254                 while (($file = readdir($dh)) !== false) {

255                     if($file != '.' && $file != '..') {

256                         if( strripos($file, 'seocheck') !== false ) {

257                             $db_base_files[] = $path.$file;

258                         }

259                     }

260                 }

261                 closedir($dh);

262             }

263         }

264         return $db_base_files;

265     }

266     

267     /**

268      * @path: 生成压缩包的路径

269      * @fileName : 要解压的文件名 默认解压到path 目录

270      */

271     public function uncompressZip($path, $zipName) {

272         $path = empty($path) ? $_SERVER['DOCUMENT_ROOT'].'/core/Runtime/Data/' : $path;

273         $zip = new ZipArchive;

274         if ($zip->open($path.$zipName) === TRUE) {

275             $zip->extractTo($path);

276             $zip->close();

277             return true;

278         } else {

279             return false;

280         }

281     }

282 

283     //导入数据库

284     public function importingDataBySqlFile () {

285         

286     }

287 

288     //  及时输出信息

289     private function _showMsg($msg,$err=false){

290         if($err === true) {

291             echo "<p style='font-size:14px;'><span style='color:red;'>ERROR: --- " . $msg . "</span></p>";exit;

292         }

293         echo "<p style='font-size:14px;'><span style='color:green;'>OK: --- " . $msg . "</span></p>";

294     }

295 

296     // 锁定数据库，以免备份或导入时出错

297     private function lock($table, $op = "WRITE") {

298         if (mysql_query ( "lock tables " . $table . " " . $op ))

299             return true;

300         else

301             return false;

302     }

303 

304     // 解锁

305     private function unlock() {

306         if (mysql_query ( "unlock tables" ))

307             return true;

308         else

309             return false;

310     }

311 

312     // 析构

313     public function __destruct() {

314         if($this->conn){

315             mysql_query ( "unlock tables", $this->conn );

316             mysql_close ( $this->conn );

317         }

318     }

319 }

320 ?>