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Homephp教程php手册PHP备份/还原MySQL数据库的代码

以下是代码:

一、备份数据库并下载到本地【db_backup.php】

复制代码 代码如下:


// 设置SQL文件保存文件名
$filename=date("Y-m-d_H-i-s")."-".$cfg_dbname.".sql";
// 所保存的文件名
header("Content-disposition:filename=".$filename);
header("Content-type:application/octetstream");
header("Pragma:no-cache");
header("Expires:0");
// 获取当前页面文件路径,SQL文件就导出到此文件夹内
$tmpFile = (dirname(__FILE__))."\\".$filename;
// 用MySQLDump命令导出数据库
exec("mysqldump -u$cfg_dbuser -p$cfg_dbpwd --default-character-set=utf8 $cfg_dbname > ".$tmpFile);
$file = fopen($tmpFile, "r"); // 打开文件
echo fread($file,filesize($tmpFile));
fclose($file);
exit;
?>


二、还原数据库【db_restore.php】

复制代码 代码如下:



【数据库SQL文件】:


// 我的数据库信息都存放到config.php文件中,所以加载此文件,如果你的不是存放到该文件中,注释此行即可;
require_once((dirname(__FILE__).'/../../include/config.php'));
if ( isset ( $_POST['sqlFile'] ) )
{
$file_name = $_POST['sqlFile']; //要导入的SQL文件名
$dbhost = $cfg_dbhost; //数据库主机名
$dbuser = $cfg_dbuser; //数据库用户名
$dbpass = $cfg_dbpwd; //数据库密码
$dbname = $cfg_dbname; //数据库名

set_time_limit(0); //设置超时时间为0,表示一直执行。当php在safe mode模式下无效,此时可能会导致导入超时,此时需要分段导入
$fp = @fopen($file_name, "r") or die("不能打开SQL文件 $file_name");//打开文件
mysql_connect($dbhost, $dbuser, $dbpass) or die("不能连接数据库 $dbhost");//连接数据库
mysql_select_db($dbname) or die ("不能打开数据库 $dbname");//打开数据库

echo "

正在清空数据库,请稍等....
";
$result = mysql_query("SHOW tables");
while ($currow=mysql_fetch_array($result))
{
mysql_query("drop TABLE IF EXISTS $currow[0]");
echo "清空数据表【".$currow[0]."】成功!
";
}
echo "
恭喜你清理MYSQL成功
";

echo "正在执行导入数据库操作
";
// 导入数据库的MySQL命令
exec("mysql -u$cfg_dbuser -p$cfg_dbpwd $cfg_dbname echo "
导入完成!";
mysql_close();
}
?>



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