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">
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<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" / alt="php mysql 数据库备份程序 " > 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phprm.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'");
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