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  • PHP 导出excel 数据量大时

    public function ceshiexcel1(){
      set_time_limit(0);
     $filename = '病毒日志';
     header('Content-Type: application/vnd.ms-excel');  
     header('Content-Disposition: attachment;filename="'.$filename.'.csv"');  
     header('Cache-Control: max-age=0'); 
    
     //原生链接mysql
     //数据库配置
            $mysql_conf = array('host' => '127.0.0.1:52971','db' => 'center', 'db_user' => 'root', 'db_pwd' => ''); 
            $mysql_conn = @mysql_connect($mysql_conf['host'], $mysql_conf['db_user'], $mysql_conf['db_pwd']);
            if (!$mysql_conn) {
                die("could not connect to the database:
    " . mysql_error());//诊断连接错误
            }
            $select_db = mysql_select_db($mysql_conf['db']);
            if (!$select_db) {
                die("could not connect to the db:
    " .  mysql_error());
            }
    
            $sql = M('logvirus')
                        ->alias('a') 
                        ->fetchsql()
                        ->field('a.id,a.strVirusName,c.address,c.rmaker,a.nVirusType,a.nunknowvirustype,a.strVirusPath,a.VirusTime,a.nunknownflag,a.terminal,d.name as rname,(case when a.iHigh_DiskType=0  then a.iLow_DiskType else a.iHigh_DiskType  end) as idisktypes')//f.iDiskTypes,j.name as iname 
                         ->join('LEFT JOIN sysinfo c ON c.terminal = a.terminal')
                        ->join('LEFT JOIN pm_dealresult d ON d.mask = a.nDealResult')  
                       // ->where($where) 
                        ->order("a.VirusTime desc")
                        ->limit('1,10')
                        ->select(); 
    
            
                     
            $head =  array(
                        'id'=>'编号',
                        'strvirusname'=>'病毒名称',
                        'address'=>'终端IP',
                        'rmaker'=>'别名',
                        'nname'=>'病毒类型',
                        'iname'=>'威胁来源',
                        'strviruspath'=>'病毒路径',
                        'rname'=>'处理结果',
                        'virustime'=>'时间' );
    
     
    
            $stmt = mysql_query($sql); 
            /*echo "<pre/>";
            while ($row = mysql_fetch_array($stmt,MYSQL_ASSOC)) {      
                foreach ($row as $i => $v) { 
                 
                    $row[$i] = iconv('utf-8', 'gb2312', $v);  
                     var_dump($row);
            }   
            }   
            exit;*/
            // 打开PHP文件句柄,php://output 表示直接输出到浏览器  
             $fp = fopen('php://output', 'a'); 
            // 输出Excel列名信息   
    
            //$head = array('id', 'casenum', 'terminal', 'strVirusMd5','nVirusType','nVirusCode','nOldVirusCode');  
            foreach ($head as $i => $v) {  
                // CSV的Excel支持GBK编码,一定要转换,否则乱码  
                $head[$i] = iconv('utf-8', 'gb2312', $v);  
            } 
    
    
            // 将数据通过fputcsv写到文件句柄  
            fputcsv($fp, $head);  
       
            // 计数器  
            $cnt = 0;  
            // 每隔$limit行,刷新一下输出buffer,不要太大,也不要太小  
            $limit = 100000;  
       
            // 逐行取出数据,不浪费内存  
            $data = array();
            while ($row = mysql_fetch_array($stmt,MYSQL_ASSOC)) {  
                $cnt ++;  
                if ($limit == $cnt) { //刷新一下输出buffer,防止由于数据过多造成问题  
                    ob_flush();  //释放
                    flush();  
                    $cnt = 0;  
                }  
                       
                foreach ($row as $i => $v) {  
                    //$row[$i] = iconv('utf-8', 'gb2312', $v);  
                      $data['id'] = $cnt; 
                     $data['strvirusname'] = iconv('utf-8', 'gb2312', $row['strVirusName']);
                     $data['address'] = iconv('utf-8', 'gb2312', $row['address']); 
                     $data['rmaker'] =iconv('utf-8', 'gb2312', $row['VirusTime']);  
                     $data['nname'] =iconv('utf-8', 'gb2312', $row['VirusTime']); 
                     $data['iname'] =iconv('utf-8', 'gb2312', $row['VirusTime']);  
                     $data['strviruspath'] =iconv('utf-8', 'gb2312', $row['VirusTime']);  
                     $data['rname'] =  $row['rname'] ;  
                     $data['virustime'] =iconv('utf-8', 'gb2312', $row['VirusTime']); 
            }   
            fputcsv($fp, $data);  
        }
        //关闭数据库
         mysql_close($mysql_conn);  
    
    }
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  • 原文地址:https://www.cnblogs.com/vens/p/9480744.html
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