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

php  /  管理员 发布于 7年前   300

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="\n";   
       $xml.="\n";   
       $xml.="\t".$totalNum."\n";   
       $xml.="\t\n";   
       for($i=0;$i<$resultNum;$i++){   
       $xml.="\t\t\n";   
       foreach($result[$i] as $key=>$val)   
       $xml.="\t\t\t<".$key.">".$val."\n";   
       $xml.="\t\t\n";   
       }   
        $xml.="\t\n";   
        $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 '           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]">   
           
              
           
           
        ';    
        echo'

';   
        if(is_array($mapping))   
        {   
          foreach($mapping as $key=>$val)   
       echo'';   
        }   
        echo'';   
        $results=$this->findBySql('select * from '.$table);   
        foreach($results as $result)   
        {   
          echo'';   
          foreach($result as $key=>$val)   
       echo'';   
       echo'';   
        }   
        echo'

'.$val.'

'.$val.'

';   
        echo'';   
        echo'';   
    }   

    function toExcel($table,$mapping,$fileName)   
    {   
      header("Content-type:application/vnd.ms-excel");   
         header("Content-Disposition:filename=".$fileName.".xls");   
      echo'           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]">   
              
              
              
              
              
        ';    
        echo'

';   
           echo'';   
        if(is_array($mapping))   
        {   
          foreach($mapping as $key=>$val)   
       echo'';   
        }   
        echo'';   
        $results=$this->findBySql('select * from '.$table);   
        foreach($results as $result)   
        {   
          echo'';   
          foreach($result as $key=>$val)   
       echo'';   
       echo'';   
        }   
        echo'

'.$val.'

'.$val.'

';   
        echo'';   
        echo'';   
    }   

    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 = "";   
      $crlf="
";   
      foreach($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');    
?>