<?
global $mysqlhost, $mysqluser, $mysqlpwd, $mysqldb;
$mysqlhost="localhost"; //host name
$mysqluser="root"; //login name
$mysqlpwd=""; //password
$mysqldb=""; //name of database
include("mydb.php");
$d=new db($mysqlhost,$mysqluser,$mysqlpwd,$mysqldb);
/*--------------界面--------------*/if(!$_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);
?>
<form name="form1" method="post" action="backup.php">
<table width="99%" border="1" cellpadding='0' cellspacing='1'>
<tr align="center" class='header'><td colspan="2">数据备份</td></tr>
<tr><td colspan="2">备份方式</td></tr>
<tr><td><input type="radio" name="bfzl" value="quanbubiao"> 备份全部数据</td><td>备份全部数据表中的数据到一个备份文件</td></tr>
<tr><td><input type="radio" name="bfzl" value="danbiao">备份单张表数据
<select name="tablename"><option value="">请选择</option>
<?
$d->query("show table status from $mysqldb");
while($d->nextrecord()){
echo "<option value='".$d->f('Name')."'>".$d->f('Name')."</option>";}
?>
</select></td><td>备份选中数据表中的数据到单独的备份文件</td></tr>
<tr><td colspan="2">使用分卷备份</td></tr>
<tr><td colspan="2"><input type="checkbox" name="fenjuan" value="yes">
分卷备份 <input name="filesize" type="text" size="10">K</td></tr>
<tr><td colspan="2">选择目标位置</td></tr>
<tr><td colspan="2"><input type="radio" name="weizhi" value="server" checked>备份到服务器</td></tr><tr class="cells"><td colspan='2'> <input type="radio" name="weizhi" value="localpc">
备份到本地</td></tr>
<tr><td colspan="2" align='center'><input type="submit" name="act" value="备份"></td></tr>
</table></form>
<?/*-------------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)
{
$re=true;
if(!@$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."\n";
$d->query("show create table ".$table);
$d->nextrecord();
$tmp=preg_replace("/\n/","",$d->f("Create Table"));
$sql.=$tmp."\n";
retur
mydb数据库备份.rar （3个子文件） 
mydb数据库备份 backup 
backup.php 8KB restore.php 6KB mydb.php 2KB资源评论
xiaoxuncom2012-10-12无用户登陆因此要整合到网站比较方便 可以分卷备份 可以备份指定的一张表但不能备份指定的某几张表即只能备份一张表或所有表两个选项 没有删除备份文件功能 只能还原指定格式及文件名格式的备份文件- mksmurf2012-06-29最好添加一句error_reporting(0);在里面的PHP文件开头，否则如果没设置好PHP服务器会报错，另外short open tag要打开，程序兼容PHP5.3及之后版本，但是功能有限，寻找功能大的童鞋，可以看看别的
