php mysql 数据库备份程序

时间：2015-01-23 来源：西部数据作者：西部数据

提供一款实例的php mysql 数据库备份程序,很好方法的可以对你的数据库进行在线实时备份,这样可以保存数据库的安全,并且他是以.sql文件保存在bakdata目录还日期生成的数据库备份文件的,代码如下:

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="content-type" content="text/html; charset=utf-8" />

<link type="text/css" rel="stylesheet" href="common/control.css">

<script type="text/javascript" language="javascript" src="common/admin.otable.js"></script>

<script type="text/javascript" language="javascript" src="common/include.func.js"></script>

<title>数据管理</title>

<style type="text/css">

span {padding-left:8px;}

</style>

</head>

<body class="contentbody">

<div class="maindiv">

<span class="ctitle">esweb系统数据管理</span>

<ul class="cmenu">

<li><a href="sql_backup.php">数据备份</a></li>

    <li><a href="sql_restore.php">数据还原</a></li>

<li><a href="sql_optimize.php">数据优化</a>

</ul>

<div class="concontent">

<?php

/*--------------界面--------------*/if(!$_post['act']){/*----------------------*/

$msgs[]="服务器备份目录为$backup";

$msgs[]="对于较大的数据表，强烈建议使用分卷备份";

$msgs[]="只有选择备份到服务器，才能使用分卷备份功能";

//show_msg($msgs);

?>

<div class="thead"><span class="left"><img src="images/icon2/into.gif" align="absmiddle" /> 如果需要备份、还原或者优化<font color="red"> 大量的数据 </font>, 推荐使用"<a href="http://www.phome.net/ebak2010/" target="_blank">帝国备份王2010</a>"</span> <span class="right"></span></div>

<form name="myform" method="post" action="sql_backup.php">

<table cellpadding="" cellspacing="0" border="0" width="100%" class="ctable" id="otable" align="center">

<tr>

<th colspan="2">esweb系统数据备份</th>

</tr>

<tr>

<td align="right" width="250">选择备份方式</td>

    <td><input type="radio" name="bfzl" value="quanbubiao" checked="checked" />备份全部数据

    <input type="radio" name="bfzl" value="danbiao" />备份单张表数据

    <select name="tablename"><option value="">请选择</option>

    <?php

    $d->query("show table status from $mysqldb");

    while($d->nextrecord()){

    echo "<option value='".$d->f('name')."'>".$d->f('name')."</option>";}

    ?>

    </select></td>

</tr>

<tr>

<td align="right">选择目标位置</td>

    <td><input type="radio" name="weizhi" value="server" checked="checked" />备份到服务器

    <input type="radio" name="weizhi" value="localpc" />备份到本地</td>

</tr>

<tr>

<td align="right">使用分卷备份</td>

    <td><input type="checkbox" name="fenjuan" value="yes" checked="checked" />

    分卷备份 <input name="filesize" type="text" value="1260" size="10" class="text2" /> k <span>(只有选择备份到服务器,才能使用分卷备份功能)</span></td>

</tr>

<tr>

<td align="right">程序说明</td>

    <td>1.对于较大的数据表,强烈建议使用分卷备份.

    <br>2.只有选择备份到服务器,才能使用分卷备份功能.

    </td>

</tr>

<tr>

<td align="center" colspan="2"><input type="submit" id="act" name="act" value="备份" class="button" /> <input type="reset" value="重置" class="button" /></td>

</tr>

</table>

</form>

<?php /*-------------界面结束-------------*/}/*---------------------------------*/

/*----*/else{/*--------------主程序-----------------------------------------*/

if($_post['weizhi']=="localpc"&&$_post['fenjuan']=='yes')

{$msgs[]="只有选择备份到服务器，才能使用分卷备份功能";

show_msg($msgs); pageend();}

if($_post['fenjuan']=="yes"&&!$_post['filesize'])

{$msgs[]="您选择了分卷备份功能，但未填写分卷文件大小";

show_msg($msgs); pageend();}

if($_post['weizhi']=="server"&&!writeable($backup))

{$msgs[]="备份文件存放目录'$backup'不可写，请修改目录属性";

show_msg($msgs); pageend();}

/*----------备份全部表-------------*/if($_post['bfzl']=="quanbubiao"){/*----*/

/*----不分卷*/if(!$_post['fenjuan']){/*--------------------------------*/

if(!$tables=$d->query("show table status from $mysqldb"))

{$msgs[]="读数据库结构错误"; show_msg($msgs); pageend();}

$sql="";

while($d->nextrecord($tables))

{

$table=$d->f("name");

$sql.=make_header($table);

$d->query("select * from $table");

$num_fields=$d->nf();

while($d->nextrecord())

{$sql.=make_record($table,$num_fields);}

}

$filename=date("ymd",time())."_all.sql";

if($_post['weizhi']=="localpc") down_file($sql,$filename);

elseif($_post['weizhi']=="server")

{if(write_file($sql,$filename))

$msgs[]="全部数据表数据备份完成,生成备份文件'$backup/$filename'";

else $msgs[]="备份全部数据表失败";

show_msg($msgs);

pageend();

}

/*-----------------不要卷结束*/}/*-----------------------*/

/*-----------------分卷*/else{/*-------------------------*/

if(!$_post['filesize'])

{$msgs[]="请填写备份文件分卷大小"; show_msg($msgs);pageend();}

if(!$tables=$d->query("show table status from $mysqldb"))

{$msgs[]="读数据库结构错误"; show_msg($msgs); pageend();}

$sql=""; $p=1;

$filename=date("ymd",time())."_all";

while($d->nextrecord($tables))

{

$table=$d->f("name");

$sql.=make_header($table);

$d->query("select * from $table");

$num_fields=$d->nf();

while($d->nextrecord())

{$sql.=make_record($table,$num_fields);

if(strlen($sql)>=$_post['filesize']*1000){

     $filename.=("_v".$p.".sql");

     if(write_file($sql,$filename))

     $msgs[]="全部数据表-卷-".$p."-数据备份完成,生成备份文件'$backup/$filename'";

     else $msgs[]="备份表-".$_post['tablename']."-失败";

     $p++;

     $filename=date("ymd",time())."_all";

     $sql="";}

}

}

if($sql!=""){$filename.=("_v".$p.".sql");

if(write_file($sql,$filename))

$msgs[]="全部数据表-卷-".$p."-数据备份完成,生成备份文件'$backup/$filename'";}

show_msg($msgs);

/*---------------------分卷结束*/}/*--------------------------------------*/

/*--------备份全部表结束*/}/*---------------------------------------------*/

/*--------备份单表------*/elseif($_post['bfzl']=="danbiao"){/*------------*/

if(!$_post['tablename'])

{$msgs[]="请选择要备份的数据表"; show_msg($msgs); pageend();}

/*--------不分卷*/if(!$_post['fenjuan']){/*-------------------------------*/

$sql=make_header($_post['tablename']);

$d->query("select * from ".$_post['tablename']);

$num_fields=$d->nf();

while($d->nextrecord())

{$sql.=make_record($_post['tablename'],$num_fields);}

$filename=date("ymd",time())."_".$_post['tablename'].".sql";

if($_post['weizhi']=="localpc") down_file($sql,$filename);

elseif($_post['weizhi']=="server")

{if(write_file($sql,$filename))

$msgs[]="表-".$_post['tablename']."-数据备份完成,生成备份文件'$backup/$filename'";

else $msgs[]="备份表-".$_post['tablename']."-失败";

show_msg($msgs);

pageend();

}

/*----------------不要卷结束*/}/*------------------------------------*/

/*----------------分卷*/else{/*--------------------------------------*/

if(!$_post['filesize'])

{$msgs[]="请填写备份文件分卷大小"; show_msg($msgs);pageend();}

$sql=make_header($_post['tablename']); $p=1;

$filename=date("ymd",time())."_".$_post['tablename'];

$d->query("select * from ".$_post['tablename']);

$num_fields=$d->nf();

while ($d->nextrecord())

{

    $sql.=make_record($_post['tablename'],$num_fields);

      if(strlen($sql)>=$_post['filesize']*1000){

     $filename.=("_v".$p.".sql");

     if(write_file($sql,$filename))

     $msgs[]="表-".$_post['tablename']."-卷-".$p."-数据备份完成,生成备份文件'$backup/$filename'";

     else $msgs[]="备份表-".$_post['tablename']."-失败";

     $p++;

     $filename=date("ymd",time())."_".$_post['tablename'];

     $sql="";}

}

if($sql!=""){$filename.=("_v".$p.".sql");

if(write_file($sql,$filename))

$msgs[]="表-".$_post['tablename']."-卷-".$p."-数据备份完成,生成备份文件'$backup/$filename'";}

show_msg($msgs);

/*----------分卷结束*/}/*--------------------------------------------------*/

/*----------备份单表结束*/}/*----------------------------------------------*/

/*---*/}/*-------------主程序结束------------------------------------------*/

function write_file($sql,$filename)

{

$re=true;

global $backup;

if(!@$fp=fopen($backup."/".$filename,"w+")) {$re=false; echo "failed to open target file";}

if(!@fwrite($fp,$sql)) {$re=false; echo "failed to write file";}

if(!@fclose($fp)) {$re=false; echo "failed to close target file";}

return $re;

}

function down_file($sql,$filename)

{

ob_end_clean();

header("content-encoding: none");

header("content-type: ".(strpos($_server['http_user_agent'], 'msie') ? 'application/octetstream' : 'application/octet-stream'));



header("content-disposition: ".(strpos($_server['http_user_agent'], 'msie') ? 'inline; ' : 'attachment; ')."filename=".$filename);



header("content-length: ".strlen($sql));

header("pragma: no-cache");



header("expires: 0");

echo $sql;

$e=ob_get_contents();

ob_end_clean();

}

function writeable($dir)

{

if(!is_dir($dir)) {

@mkdir($dir, 0777);

}

if(is_dir($dir))

{

if($fp = @fopen("$dir/test.test", 'w'))

    {

@fclose($fp);

@unlink("$dir/test.test");

$writeable = 1;

}

else {

$writeable = 0;

}

}

return $writeable;

}

function make_header($table)

{global $d;

$sql="drop table if exists ".$table." ";

$d->query("show create table ".$table);

$d->nextrecord();

$tmp=preg_replace("/ /","",$d->f("create table"));

$sql.=$tmp." ";

return $sql;

}

function make_record($table,$num_fields)

{global $d;

$comma="";

$sql .= "insert into ".$table." values(";

for($i = 0; $i < $num_fields; $i++)

{$sql .= ($comma."'".mysql_escape_string($d->record[$i])."'"); $comma = ",";}

$sql .= ") ";

return $sql;

}

function show_msg($msgs)

{

$title="提示：";

echo "<table width='100%' border='0' cellpadding='0' cellspacing='0'>";

echo "<tr><td>".$title."</td></tr>";

echo "<tr><td><br><ul>";

while (list($k,$v)=each($msgs))

{

echo "<li>".$v."</li>";

}

echo "</ul></td></tr></table>";

}

function pageend()

{

exit();

}

?>

</div><br /><br />

</div>

</div>

</body>

</html>

class db{

var $linkid;

var $sqlid;

var $record;

function db($host="",$username="",$password="",$database="")

{

if(!$this->linkid)    @$this->linkid = mysql_connect($host, $username, $password) or die("连接服务器失败.");

@mysql_select_db($database,$this->linkid) or die("无法打开数据库");

return $this->linkid;}

function query($sql)

{if($this->sqlid=mysql_query($sql,$this->linkid)) return $this->sqlid;

else {

    $this->err_report($sql,mysql_error);

return false;}

}

function nr($sql_id="")

{if(!$sql_id) $sql_id=$this->sqlid;

return mysql_num_rows($sql_id);}

function nf($sql_id="")

{if(!$sql_id) $sql_id=$this->sqlid;

return mysql_num_fields($sql_id);}

function nextrecord($sql_id="")

{if(!$sql_id) $sql_id=$this->sqlid;

if($this->record=mysql_fetch_array($sql_id))    return $this->record;

else return false;

}

function f($name)

{

if($this->record[$name]) return $this->record[$name];

else return false;

}

function close() {mysql_close($this->linkid);}

function lock($tblname,$op="write")

{if(mysql_query("lock tables ".$tblname." ".$op)) return true; else return false;}

function unlock()

{if(mysql_query("unlock tables")) return true; else return false;}

function ar() {

      return @mysql_affected_rows($this->linkid);

    }

function i_id() {

    return mysql_insert_id();

}

function err_report($sql,$err)

{

echo "mysql查询错误<br>";

echo "查询语句：".$sql."<br>";

echo "错误信息：".$err;

}//开源代码phpfensi.com

/****************************************类结束***************************/

global $mysqlhost, $mysqluser, $mysqlpwd, $mysqldb, $backup;

$mysqlhost = $mydbhost;          //host name

$mysqluser = $mydbuser;          //login name

$mysqlpwd = $mydbpw;             //password

$mysqldb = $mydbname;            //name of database

$d=new db($mysqlhost,$mysqluser,$mysqlpwd,$mysqldb);

$d->query("set names 'utf8'");