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【www.gdgbn.com--mysql教程】
代码如下?>
css教程" rel="stylesheet" href="common/control.css">
<script type="text/网页特效" language="javascript" src="common/admin.otable.js"></script>
<script type="text/javascript" language="javascript" src="common/include.func.js"></script>
esweb系统数据管理
数据备份
数据还原
数据优化
/*--------------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);
?>
如果需要备份、还原或者优化 大量的数据 , 推荐使用"帝国备份王2010"
/*----*/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)
{
$title="提示：";
echo "";
echo "".$title."";
echo "
";
while (list($k,$v)=each($msgs))
{
echo "".$v."";
}
echo "";
}
function pageend()
{
exit();
}
?>
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
";
echo "查询语句：".$sql."
";
echo "错误信息：".$err;
}
/****************************************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"");