php mysql database backup program_PHP tutorial

php mysql 数据库备份程序 /* 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。

php教程 mysql教程 数据库教程备份程序
/*
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。
*/

?>

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"

esweb system data backup
Select backup method	Back up all data Back up single table data Please select $d->query("show table status from $mysqldb"); While($d->nextrecord()){ echo "".$d->f('name')."";} ?>
Select target location	Back up to server Back up to local
Use volume backup	Split volume backup k (You can only use split volumes if you choose to back up to the server. Backup function)
Program description	1. For larger data tables, it is strongly recommended to use volume backup. 2. The volume backup function can only be used if you choose to back up to the server.

/*----*/else{/*--------------Main program---------------------- ------------------*/
if($_post['weizhi']=="localpc"&&$_post['fenjuan']=='yes')
{$msgs[]="The volume backup function can only be used if you choose to back up to the server";
show_msg($msgs); pageend();}
if($_post['fenjuan']=="yes"&&!$_post['filesize'])
{$msgs[]="You selected the volume backup function, but did not fill in the volume file size";
show_msg($msgs); pageend();}
if($_post['weizhi']=="server"&&!writeable($backup))
{$msgs[]="The backup file storage directory '$backup' is not writable, please modify the directory attributes";
show_msg($msgs); pageend();}

/*----------Back up all tables-------------*/if($_post['bfzl']=="quanbubiao"){/ *----*/
/*----Not divided into volumes*/if(!$_post['fenjuan']){/*------------------------- -------*/
if(!$tables=$d->query("show table status from $mysqldb"))
{$msgs[]="Error in reading database structure"; 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))
$msgs[]="All data table data backup completed, backup file '$backup/$filename' is generated";
else $msgs[]="Backup of all data tables failed";
show_msg($msgs);
pageend();
}
/*-----------------Don't end the roll*/}/*----------------------- */
/*-----------------Volume*/else{/*----------------------- --*/
if(!$_post['filesize'])
{$msgs[]="Please fill in the backup file volume size"; show_msg($msgs);pageend();}
if(!$tables=$d->query("show table status from $mysqldb"))
{$msgs[]="Error in reading database structure"; 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))
$msgs[]="All data tables-volume-".$p."-Data backup completed, backup file '$backup/$filename'" is generated;
         else $msgs[]="Backup table-".$_post['tablename']."-Failed";
$p++;
$filename=date("ymd",time())."_all";
$sql="";}
}
}
if($sql!=""){$filename.=("_v".$p.".sql");
if(write_file($sql,$filename))
$msgs[]="All data tables-volume-".$p."-data backup completed, generate backup file '$backup/$filename'";}
show_msg($msgs);
/*---------------------End of volume*/}/*------------------ ------------------*/
/*--------End of backing up all tables*/}/*---------------------------------- ---------------*/

/*--------Backup single table------*/elseif($_post['bfzl']=="danbiao"){/*-------- ----*/
if(!$_post['tablename'])
{$msgs[]="Please select the data table to be backed up"; show_msg($msgs); pageend();}
/*--------Not divided into volumes*/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))
$msgs[]="Table-".$_post['tablename']."-Data backup is completed and the backup file '$backup/$filename'" is generated;
else $msgs[]="Backup table-".$_post['tablename']."-failed";
show_msg($msgs);
pageend();
}
/*----------------Don't end the roll*/}/*------------------------ ------------*/
/*----------------Volume*/else{/*-------------------------- ---------------*/
if(!$_post['filesize'])
{$msgs[]="Please fill in the backup file volume size"; show_msg($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))
$msgs[]="Table-".$_post['tablename']."-Volume-".$p."-Data backup is completed, and the backup file '$backup/$filename'" is generated;
        else $msgs[]="Backup table-".$_post['tablename']."-Failed";
$p++;
$filename=date("ymd",time())."_".$_post['tablename'];
$sql="";}
}
if($sql!=""){$filename.=("_v".$p.".sql");
if(write_file($sql,$filename))
$msgs[]="Table-".$_post['tablename']."-Volume-".$p."-Data backup is completed and the backup file '$backup/$filename'" is generated;}
show_msg($msgs);
/*----------End of volume*/}/*-------------------------------- ------------------*/
/*----------End of backup single table*/}/*-------------------------------- ------------------*/

/*---*/}/*-------------End of main program--------------------- ---------------------*/

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."n";
$d->query("show create table ".$table);
$d->nextrecord();
$tmp=preg_replace("/n/","",$d->f("create table"));
$sql.=$tmp."n";
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 .= ")n";
return $sql;
}

function show_msg($msgs)
{
$title="提示：";
echo "

";
echo "";
echo "

".$title."

";
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;
}
/**************************************End of class********** *****************/

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'");

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