php 备份和恢复数据库

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<title>系统维护</title>
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body{
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}
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<body>
<p>
<a href="updateAdminpwd.html" target="content">修改管理员密码</a> ||
<a href="sys_main.php?action=beifen" target="content">备份数据库</a> ||
<a href="sys_main.php?action=huifu" target="content">恢复数据库</a>
</p>
<?php
    if($_GET["action"] == "huifu") {
        include "sys_huifuData.php";
         
    }else if ($_GET["action"] == "beifen"){
        date_default_timezone_set('PRC');
        include "config.php";
         
        $backcmd = "mysqldump -u$username -p$password yanjing";
        //exec($backcmd,$out,$status);
        //echo "备份成功".$backcmd;
         
        $comm_dir = "D:/Program Files (x86)/EasyPHP-5.3.8.0/mysql/bin/";//mysqldump所在路径：mysql/bin
        $file_dir = "backup/";//备份文件路径
        $file_name = date("Ymd-His").".sql";//备份文件名
         
        $backCMD = $backcmd.'>'.$file_dir.$file_name;
        //echo $backCMD."<br>";
        exec($backCMD,$arr,$i);//执行备份命令
        if($i == 0)
        {
            echo "备份成功";
        }else{
            echo "备份失败";
        }
    }else if ($_GET["action"] == "huifuaction") {
        // 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('config.php'); 
        if ( isset ( $_POST['sqlFile'] ) ) 
        { 
            $file_name = "backup/".$_POST['sqlFile']; //要导入的SQL文件名 
             
            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 "<p>正在清空数据库,请稍等....<br>"; 
            $result = mysql_query("SHOW tables"); 
            while ($currow=mysql_fetch_array($result)) 
            { 
                mysql_query("drop TABLE IF EXISTS $currow[0]"); 
                echo "清空数据表【".$currow[0]."】成功！<br>"; 
            } 
            echo "<br>恭喜你清理MYSQL成功<br>"; 
             
            echo "正在执行导入数据库操作<br>"; 
            // 导入数据库的MySQL命令 
            //linux下
            //exec("mysql -u$dbuser -p$dbpass $dbname < ".$file_name); 
            //win下
            exec("source ".$file_name);
            echo "<br>导入完成！"; 
            mysql_close(); 
        } 
 
    }
?>
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</html>