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php 备份数据库代码(生成word,excel,json,xml,sql)

程序员文章站 2023-08-18 18:27:09
单表备份代码：复制代码 代码如下:
单表备份
代码：
复制代码 代码如下:

<?php   
class db   
{   
    var $conn;   

    function db($host="localhost",$user="root",$pass="root",$db="test")   
    {   
      if(!$this->conn=mysql_connect($host,$user,$pass))   
      die("can't connect to mysql sever");   
      mysql_select_db($db,$this->conn);   
      mysql_query("set names 'utf-8'");   
    }   

    function execute($sql)   
    {   
       return mysql_query($sql,$this->conn);   
    }   

    function findcount($sql)   
    {   
        $result=$this->execute($sql);   
        return mysql_num_rows($result);   
    }   

    function findbysql($sql)   
    {   
        $array=array();   
        $result=mysql_query($sql);   
        $i=0;   
        while($row=mysql_fetch_assoc($result))   
           {   
          $array[$i]=$row;    
       $i++;   
           }   
        return $array;   
    }   

    //$con的几种情况   
    //空：返回全部记录   
    //array：eg. array('id'=>'1') 返回id=1的记录   
    //string :eg. 'id=1' 返回id=1的记录   
    function toextjson($table,$start="0",$limit="10",$cons="")   
    {   
       $sql=$this->generatesql($table,$cons);   
       $totalnum=$this->findcount($sql);   
       $result=$this->findbysql($sql." limit ".$start." ,".$limit);   
       $resultnum = count($result);//当前结果数   
      $str="";   
      $str.= "{";   
      $str.= "'totalcount':'$totalnum',";   
      $str.="'rows':";   
      $str.="[";   
      for($i=0;$i<$resultnum;$i++){   
       $str.="{";    
       $count=count($result[$i]);   
       $j=1;   
       foreach($result[$i] as $key=>$val)   
       {   
       if($j<$count)   
       {   
       $str.="'".$key."':'".$val."',";   
       }   
       elseif($j==$count)   
       {   
       $str.="'".$key."':'".$val."'";   
       }   
       $j++;   
                }   

       $str.="}";   
       if ($i != $resultnum-1) {   
                 $str.= ",";   
             }   
      }   
      $str.="]";   
      $str.="}";   
      return $str;     
    }   

    function generatesql($table,$cons)   
    {   
        $sql="";//sql条件   
       $sql="select * from ".$table;   
       if($cons!="")   
       {   
       if(is_array($cons))   
       {   
         $k=0;   
         foreach($cons as $key=>$val)   
      {   
      if($k==0)   
      {   
      $sql.="where '";   
      $sql.=$key;   
      $sql.="'='";   
      $sql.=$val."'";   
      }else 
      {   
      $sql.="and '";   
      $sql.=$key;   
      $sql.="'='";   
      $sql.=$val."'";   
      }   
      $k++;   
      }   
       }else 
       {   
       $sql.=" where ".$cons;   
       }   
       }   
       return $sql;   
    }   

    function toextxml($table,$start="0",$limit="10",$cons="")   
    {   
       $sql=$this->generatesql($table,$cons);   
       $totalnum=$this->findcount($sql);   
       $result=$this->findbysql($sql." limit ".$start." ,".$limit);   
       $resultnum = count($result);//当前结果数   
       header("content-type: text/xml");   
       $xml="<?xml version=\"1.0\"  encoding=\"utf-8\" ?>\n";   
       $xml.="<xml>\n";   
       $xml.="\t<totalcount>".$totalnum."</totalcount>\n";   
       $xml.="\t<items>\n";   
       for($i=0;$i<$resultnum;$i++){   
       $xml.="\t\t<item>\n";   
       foreach($result[$i] as $key=>$val)   
       $xml.="\t\t\t<".$key.">".$val."</".$key.">\n";   
       $xml.="\t\t</item>\n";   
       }   
        $xml.="\t</items>\n";   
        $xml.="</xml>\n";   
        return $xml;   
    }   

    //输出word表格   
    function toword($table,$mapping,$filename)   
    {   
       header('content-type: application/doc');    
          header('content-disposition: attachment; filename="'.$filename.'.doc"');    
          echo '<html xmlns:o="urn:schemas-microsoft-com:office:office"   
           xmlns:w="urn:schemas-microsoft-com:office:word"   
           xmlns="[url=http://www.w3.org/tr/rec-html40]http://www.w3.org/tr/rec-html40[/url]">   
        <head>   
           <meta http-equiv="content-type" content="text/html; charset=utf-8" />   
        <title>'.$filename.'</title>   
        </head>   
        <body>';    
        echo'<table border=1><tr>';   
        if(is_array($mapping))   
        {   
          foreach($mapping as $key=>$val)   
       echo'<td>'.$val.'</td>';   
        }   
        echo'</tr>';   
        $results=$this->findbysql('select * from '.$table);   
        foreach($results as $result)   
        {   
          echo'<tr>';   
          foreach($result as $key=>$val)   
       echo'<td>'.$val.'</td>';   
       echo'</tr>';   
        }   
        echo'</table>';   
        echo'</body>';   
        echo'</html>';   
    }   

    function toexcel($table,$mapping,$filename)   
    {   
      header("content-type:application/vnd.ms-excel");   
         header("content-disposition:filename=".$filename.".xls");   
      echo'<html xmlns:o="urn:schemas-microsoft-com:office:office" 
           xmlns:x="urn:schemas-microsoft-com:office:excel" 
           xmlns="[url=http://www.w3.org/tr/rec-html40]http://www.w3.org/tr/rec-html40[/url]">   
           <head>   
           <meta http-equiv="expires" content="mon, 06 jan 1999 00:00:01 gmt">   
           <meta http-equiv=content-type content="text/html; charset=iso-8859-1">   
           <!--[if gte mso 9]><xml>   
           <x:excelworkbook>   
               <x:excelworksheets>   
                       <x:excelworksheet>   
                           <x:name></x:name>   
                           <x:worksheetoptions>   
                               <x:displaygridlines/>   
                           </x:worksheetoptions>   
                       </x:excelworksheet>   
               </x:excelworksheets>   
           </x:excelworkbook>   
           </xml><![endif]-->   
           </head>   
        <body link=blue vlink=purple leftmargin=0 topmargin=0>';    
        echo'<table width="100%" border="0" cellspacing="0" cellpadding="0">';   
           echo'<tr>';   
        if(is_array($mapping))   
        {   
          foreach($mapping as $key=>$val)   
       echo'<td>'.$val.'</td>';   
        }   
        echo'</tr>';   
        $results=$this->findbysql('select * from '.$table);   
        foreach($results as $result)   
        {   
          echo'<tr>';   
          foreach($result as $key=>$val)   
       echo'<td>'.$val.'</td>';   
       echo'</tr>';   
        }   
        echo'</table>';   
        echo'</body>';   
        echo'</html>';   
    }   

    function backup($table)   
    {   
      if(is_array ($table))   
      {   
       $str="";   
       foreach($table as $tab)   
       $str.=$this->get_table_content($tab);   
       return $str;   
      }else{   
       return $this->get_table_content($table);   
      }   
    }   

    function backuptofile($table,$file)   
    {   
      header("content-disposition: filename=$file.sql");//所保存的文件名   
      header("content-type: application/octetstream");   
      header("pragma: no-cache");   
      header("expires: 0");   
      if(is_array ($table))   
      {   
       $str="";   
       foreach($table as $tab)   
       $str.=$this->get_table_content($tab);   
       echo $str;   
      }else{   
       echo $this->get_table_content($table);   
      }   
    }   

    function restore($table,$file="",$content="")   
    {   
      //排除file，content都为空或者都不为空的情况   
      if(($file==""&&$content=="")||($file!=""&&$content!=""))   
      echo"参数错误";   
      $this->truncate($table);   
      if($file!="")   
      {   
       if($this->restorefromfile($file))   
       return true;   
       else 
       return false;   
      }   
      if($content!="")   
      {   
       if($this->restorefromcontent($content))   
       return true;   
       else 
       return false;   
      }   
    }   

    //清空表，以便恢复数据   
    function truncate($table)   
    {   
      if(is_array ($table))   
      {   
       $str="";   
       foreach($table as $tab)   
       $this->execute("truncate table $tab");   
      }else{   
       $this->execute("truncate table $table");   
      }   
    }   

    function get_table_content($table)   
    {   
      $results=$this->findbysql("select * from $table");   
      $temp = "";   
      $crlf="<br>";   
      foreach($results as $result)   
      {   

       /*(";  
      foreach($result as $key=>$val)  
      {  
       $schema_insert .= " `".$key."`,";  
      }  
      $schema_insert = ereg_replace(",$", "", $schema_insert);  
      $schema_insert .= ")   
      */ 
      $schema_insert = "insert into  $table values (";   
      foreach($result as $key=>$val)   
      {   
       if($val != "")   
       $schema_insert .= " '".addslashes($val)."',";   
       else 
       $schema_insert .= "null,";   
      }   
      $schema_insert = ereg_replace(",$", "", $schema_insert);   
      $schema_insert .= ");$crlf";   
      $temp = $temp.$schema_insert ;   
      }   
      return $temp;   
    }   

    function restorefromfile($file){   
      if (false !== ($fp = fopen($file, 'r'))) {   
       $sql_queries = trim(fread($fp, filesize($file)));   
       $this->splitmysqlfile($pieces, $sql_queries);   
       foreach ($pieces as $query) {   
        if(!$this->execute(trim($query)))   
        return false;   
       }   
       return true;   
      }   
      return false;   
    }   

    function restorefromcontent($content)   
    {   
      $content = trim($content);   
      $this->splitmysqlfile($pieces, $content);   
      foreach ($pieces as $query) {   
       if(!$this->execute(trim($query)))   
       return false;   
      }   
      return true;   
    }   

    function splitmysqlfile(&$ret, $sql)   
    {   
      $sql= trim($sql);   
      $sql=split(';',$sql);   
      $arr=array();   
      foreach($sql as $sq)   
      {   
        if($sq!="");   
        $arr[]=$sq;   
      }   
      $ret=$arr;   
      return true;   
    }   
}    

$db=new db();   

// 生成 word    
//$map=array('no','name','email','age');   
//echo  $db->toword('test',$map,'档案');   

// 生成 excel    
//$map=array('no','name','email','age');   
//echo  $db->toexcel('test',$map,'档案');   

// 生成 xml    
//echo  $db->toextxml('test',0,20);   

// 生成 json    
//echo  $db->toextjson('test',0,20);   

//备份       
//echo $db->backuptofile('test','backup');    
?>

整表备份
复制代码 代码如下:

$link = mysql_connect(db_host,db_user,db_pass);
$tables = mysql_list_tables(db_name);
$cachetables = array(); $tableselected = array();
while ($table = mysql_fetch_row($tables))
{
   $cachetables[$table[0]] = $table[0];
   $tableselected[$table[0]] = 1;
}
$table = $cachetables;
$filename =  db_name . "_" . date("y_m_d_h_i_s") . ".sql";
$path = "sql/" . $filename;
$filehandle = fopen($path, "w");
$result = mysql_query("show tables");
while ($currow = mysql_fetch_array($result))
{
   if (isset($table[$currow[0]]))
   {
     sqldumptable($currow[0], $filehandle);
     fwrite($filehandle, "\n\n\n");
   }
}
fclose($filehandle);
$update_data = array('filename' => $filename, 'postdate' => mktime());
$db->insert('backup_db', $update_data);
// data dump functions
function sqldumptable($table, $fp = 0)
{
    $tabledump = "drop table if exists " . $table . ";\n";
    $result = mysql_fetch_array(mysql_query("show create table " . $table));
    //echo "show create table $table";
    $tabledump .= $result[1] . ";\r\n";
    if ($fp) {
        fwrite($fp, $tabledump);
    } else {
        echo $tabledump;
    }
    // get data
    $rows = mysql_query("select * from " . $table);
    // $numfields=$db->num_fields($rows);
    $numfields = mysql_num_fields($rows);
    while ($row = mysql_fetch_array($rows)) {
        $tabledump = "insert into " . $table . " values(";
        $fieldcounter = -1;
        $firstfield = 1;
        // get each field's data
        while (++$fieldcounter < $numfields) {
            if (!$firstfield) {
                $tabledump .= ", ";
            } else {
                $firstfield = 0;
            }
            if (!isset($row[$fieldcounter])) {
                $tabledump .= "null";
            } else {
                $tabledump .= "'" . mysql_escape_string($row[$fieldcounter]) . "'";
            }
        }
        $tabledump .= ");\n";
        if ($fp) {
            fwrite($fp, $tabledump);
        } else {
            echo $tabledump;
        }
    }
    mysql_free_result($rows);
}

导入数据库
复制代码 代码如下:

<?php
/************
*
php导入.sql文件
运行版本:php5,php4 使用的时候请选择
作者:panxp
邮件:coolpan123@gmail.com
*
*************/
    $file_dir = dirname(__file__);
    $file_name = "2010-05-09-bak.sql";
    $conn = mysql_connect(db_host,db_user,db_pass);
    mysql_select_db(db_name, $conn);
    /** php5 版本 **/
    $get_sql_data = file_get_contents($file_name, $file_dir);
    /** 
    * php4 版本
    if(file_exists($file_dir."/".$file_name))
    {
        $get_sql_data = fopen($file_dir."/".$file_name,"r");  
        if(!$get_sql_data)
        {
            echo "不能打开文件";
        }
        else
        {
            $get_sql_data = fread($get_sql_data, filesize ($file_dir."/".$file_name));
        }
    }
    ***/
    $explode = explode(";", $get_sql_data);
    $cnt = count($explode);
    for ($i=0; $i<$cnt; $i++)
    {
        $sql = $explode[$i];
        $result = mysql_query($sql);
        mysql_query("set names 'utf8'");
        if ($result) {
            echo "成功:".$i."个查询<br>";
        } else {
            echo "导入失败:".mysql_error();
        }
    }
?>

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