用php实现备份数据库ZIP及导出

发表时间：2014-09-05来源：网络

经常在有的PHP开源系统中，看到有备份数据库并导出的方法，其实代码不复杂，下面
大概讲解下，以WINDOWS为例子，两类方法，一个是目录文件夹要有执行脚本权限的，
一个个是没有权限的，代码如下：

一）

Java代码
1. <?php
2.
3. $username = "root";
4. $password = "";
5. $hostname = "localhost";
6. $dbname   = "test";
7.
8.
9. $dumpfname = $dbname . "_" . date("Y-m-d_H-i-s").".sql";
10. $command = "C://xampp//mysql//bin//mysqldump --add-drop-table --host=$hostname
11.     --user=$username ";
12. if ($password)
13.         $command.= "--password=". $password ." ";
14. $command.= $dbname;
15. $command.= " > " . $dumpfname;
16. system($command);
17.
18. // zip 数据文件
19. $zipfname = $dbname . "_" . date("Y-m-d_H-i-s").".zip";
20. $zip = new ZipArchive();
21. if($zip->open($zipfname,ZIPARCHIVE::CREATE))
22. {
23.    $zip->addFile($dumpfname,$dumpfname);
24.    $zip->close();
25. }
26.
27. // read zip file and send it to standard output
28. if (file_exists($zipfname)) {
29.     header('Content-Description: File Transfer');
30.     header('Content-Type: application/octet-stream');
31.     header('Content-Disposition: attachment; filename='.basename($zipfname));
32.     flush();
33.     readfile($zipfname);
34.     exit;
35. }
36. ?>

方法2 文件夹没相关权限
Java代码
1. <?php
2. ob_start();
3.
4. $username = "root";
5. $password = "";
6. $hostname = "localhost";
7. $dbname   = "test";
8.
9. $command = "C://xampp//mysql//bin//mysqldump --add-drop-table --host=$hostname
10.     --user=$username ";
11. if ($password)
12.         $command.= "--password=". $password ." ";
13. $command.= $dbname;
14. system($command);
15.
16. $dump = ob_get_contents();
17. ob_end_clean();
18.
19.
20. //不ZIP了
21. header('Content-Description: File Transfer');
22. header('Content-Type: application/octet-stream');
23. header('Content-Disposition: attachment; filename='.basename($dbname . "_" .
24.     date("Y-m-d_H-i-s").".sql"));
25. flush();
26. echo $dump;
27. exit();]]>
28. ?>