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php简单备份与还原MySql的方法_PHP

May 28, 2016 am 11:46 AM
php

本文实例讲述了php简单备份与还原MySql的方法。分享给大家供大家参考,具体如下:

一、备份:

<&#63;php
header ( "content-Type: text/html; charset=utf-8" );
//备份数据库
$host="localhost";
$user="root";//数据库账号
$password="123456";//数据库密码
$dbname="test";//数据库名称
//这里的账号、密码、名称都是从页面传过来的
if(!mysql_connect($host,$user,$password)) //连接mysql数据库
{
 echo '数据库连接失败,请核对后再试';
 exit;
}
if(!mysql_select_db($dbname)) //是否存在该数据库
{
 echo '不存在数据库:'.$dbname.',请核对后再试';
 exit;
}
mysql_query("set names 'utf8'");
$mysql= "set charset utf8;\r\n";
$q1=mysql_query("show tables");
while($t=mysql_fetch_array($q1)){
  $table=$t[0];
  $q2=mysql_query("show create table `$table`");
  $sql=mysql_fetch_array($q2);
  $mysql.=$sql['Create Table'].";\r\n";
  $q3=mysql_query("select * from `$table`");
  while($data=mysql_fetch_assoc($q3)){
    $keys=array_keys($data);
    $keys=array_map('addslashes',$keys);
    $keys=join('`,`',$keys);
    $keys="`".$keys."`";
    $vals=array_values($data);
    $vals=array_map('addslashes',$vals);
    $vals=join("','",$vals);
    $vals="'".$vals."'";
    $mysql.="insert into `$table`($keys) values($vals);\r\n";
  }
}
$filename="data/".$dbname.date('Ymjgi').".sql"; //存放路径,默认存放到项目最外层
$fp = fopen($filename,'w');
fputs($fp,$mysql);
fclose($fp);
echo "数据备份成功";
&#63;>

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二、还原

<!--
 author:果冻
 qq:52091199
 blog:http://wyg517.blog.163.com
-->
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<&#63;php
$filename = "test20101216923.sql";
$host="localhost"; //主机名
$user="root"; //MYSQL用户名
$password="123456"; //密码
$dbname="test"; //在此指定您要恢复的数据库名,不存在则必须先创建,请自已修改数据库名
mysql_connect($host,$user,$password);
mysql_select_db($dbname);
$mysql_file="data/".$filename; //指定要恢复的MySQL备份文件路径,请自已修改此路径
restore($mysql_file); //执行MySQL恢复命令
function restore($fname)
 {
 if (file_exists($fname)) {
  $sql_value="";
  $cg=0;
  $sb=0;
  $sqls=file($fname);
  foreach($sqls as $sql)
  {
  $sql_value.=$sql;
  }
  $a=explode(";\r\n", $sql_value); //根据";\r\n"条件对数据库中分条执行
  $total=count($a)-1;
  mysql_query("set names 'utf8'");
  for ($i=0;$i<$total;$i++)
  {
  mysql_query("set names 'utf8'");
  //执行命令
  if(mysql_query($a[$i]))
  {
   $cg+=1;
  }
  else
  {
   $sb+=1;
   $sb_command[$sb]=$a[$i];
  }
  }
  echo "操作完毕,共处理 $total 条命令,成功 $cg 条,失败 $sb 条";
  //显示错误信息
  if ($sb>0)
  {
  echo "<hr><br><br>失败命令如下:<br>";
  for ($ii=1;$ii<=$sb;$ii++)
  {
   echo "<p><b>第 ".$ii." 条命令(内容如下):</b><br>".$sb_command[$ii]."</p><br>";
  }
  }  //-----------------------------------------------------------
 }else{
  echo "MySQL备份文件不存在,请检查文件路径是否正确!";
 }
 }
&#63;>

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更多关于PHP相关内容感兴趣的读者可查看本站专题:《PHP基于pdo操作数据库技巧总结》、《PHP+MongoDB数据库操作技巧大全》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

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