让Windows系统每天自动备份MySql数据库

//数据库备份保存目录,路径要用反斜杠.您需要手动建立它.
$store_folder = 'D:\databse_backup';
//用户名和密码
//该帐号须有操作[所有]的数据库及FILE的权限
//否则有些数据库不能备份.
$db_username = “用户名”;
$db_password = “密码”;
$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”;
$command .= dirname(__FILE__).”\\WinRAR\\WinRAR.exe a -ep1 -r -o+ -m5 -df \”$nowdir.rar\” \”$nowdir\” \r\n”;
$command .= “echo OK!\r\n”;
$command .= “del mysqldumping_temp.bat\r\n”;
$fp = fclose('mysqldumping_temp.bat','w');
fwrite($fp,$command);
fclose($fp);

//删除 5 天前的文件
@unlink(“$store_folder\\”.date(“Ymd”,$time-86400*5).”.rar”);
?>

php.exe mysql_backup.php
if exist mysqldumping_temp.bat call mysqldumping_temp.bat