1. 環境: windows server 2003 +  PHP5 + MySQL 5.1.6. 
2. 假設 PHP 安裝目錄為 D:/php ,MySQL 安裝目錄為 D:/mysql. 
3. 在 D:/php 下建立目錄 WinRAR, 把你 winrar 安裝目錄下的 WinRAR.exe 和 RARReg.KEY 復制到 D:/php/WinRAR . 
4. D:/php 下建立文件 mysql_backup.php: 

代碼如下: 

<?  //保存目錄,路徑要用反斜杠.您需要手動建立它.  $store_folder = 'D:/databse_backup';  //用戶名和密碼  //該帳號須有操作[所有]的數據庫及FILE的權限  //否則有些數據庫不能備份.  $db_username = "root";  $db_password = "";  $time=time();  $nowdir = "$store_folder//".date("Ymd",$time)."";  if(file_exists("$nowdir.rar")) die("File exists./r/n");  @mkdir($nowdir);  mysql_connect("localhost","$db_username","$db_password");  $query=mysql_list_dbs();  $command = '';  while($result=mysql_fetch_array($query)){    $command .= dirname(__FILE__).'/../mysql/bin/mysqldump --opt '."$result[Database] -u{$db_username} ".($db_password?"-p{$db_password}":"")." > $nowdir//$result[Database].sql /r/n";    $command .= "echo dumping database `$result[Database]`... /r/n";  }    $command .= "echo Winrar loading.../r/n";  $command .= dirname(__FILE__)."http://WinRAR//WinRAR.exe a -ep1 -r -o+ -m5 -df /"$nowdir.rar/" /"$nowdir/" /r/n";  $command .= "echo OK!/r/n";  $command .= "del mysqldumping_temp.bat/r/n";  $fp = fopen('mysqldumping_temp.bat','w');  fwrite($fp,$command);  fclose($fp);  //刪除 5 天前的文件  @unlink("$store_folder//".date("Ymd",$time-86400*5).".rar");  ?>  

或者用下面的代碼：

<?//保存目錄,路徑要用反斜杠.您需要手動建立它.$store_folder = ‘D:/database_backup';//用戶名和密碼//該帳號須有操作[所有]的數據庫及FILE的權限//否則有些數據庫不能備份.$db_username = “root”;$db_password = “”;$time=time();$nowdir = “$store_folder//”.date(“Ymd”,$time).””;if(file_exists(“$nowdir.rar”)) die(“File exists./n”);@mkdir($nowdir);mysql_connect(“localhost”,”$db_username”,”$db_password”);$query=mysql_list_dbs();while($result=mysql_fetch_array($query)){system (dirname(__FILE__).'/../mysql/bin/mysqldump –opt ‘.”$result[Database] -u{$db_username} “.($db_password?”-p{$db_password}”:””).” > $nowdir//$result[Database].sql”);echo “dumping database `$result[Database]`…/n”;}echo “/nWinrar loading…/n”;system( dirname(__FILE__).”//WinRAR//WinRAR.exe a -ep1 -r -o+ -m5 -df /”$nowdir.rar/” /”$nowdir/” ” );//刪除 5 天前的文件@unlink(“$store_folder//”.date(“Ymd”,$time-86400*5).”.rar”);echo “/nOK!/n”;?>

5. D:/php 下建立文件 mysql_backup.bat,內容為: