function downfile($fileurl) {

         $filenameexplode=explode('/',$fileurl);

         $fileRealName=$filenameexplode[count($filenameexplode)-];

         $filename=$fileurl;

         $file  =  fopen($filename, "rb");

         Header( "Content-type:  application/octet-stream ");

         Header( "Accept-Ranges:  bytes ");

         Header( "Content-Disposition:  attachment;  filename= ".$fileRealName);

         $contents = "";

         while (!feof($file)) {

              $contents .= fread($file, );

         }

         echo $contents;

         fclose($file);

     }  

 set_time_limit();

 ini_set("max_execution_time", );

 ini_set("memory_limit", "1G");

 require_once 'Excel/PHPExcel/IOFactory.php';

 $filePath ='pdforimg.xlsx';

 $fileType = PHPExcel_IOFactory::identify($filePath);

 $objReader = PHPExcel_IOFactory::createReader($fileType);

 $objPHPExcel = $objReader->load($filePath);

 //$sheet = $objPHPExcel->getSheet(); // 读取第一個工作表

 $arr = $objPHPExcel->getActiveSheet()->toArray();

 foreach($arr as $k=>$v){

     if($k>=){

         foreach($arr[] as $kk=>$vv){

             $isnull=str_replace(' ','',$v[]);

             if(!($isnull) || $isnull=="  "){

                 break;

             }

             $data[$k-][$arr[][$kk]]=$v[$kk];

         }

     }

 }

 $filename = 'tmp.zip';

 $zip = new ZipArchive();

 $zip->open($filename, ZipArchive::OVERWRITE);

 foreach ($data as $key=>$vo) {

     if($key>= && $key<){

         $filenameexplode=explode('/',$vo['url']);

         $fileRealName=$filenameexplode[count($filenameexplode)-];

         $fileData = file_get_contents($vo['url']);

         if ($fileData) {

             $zip->addFromString($fileRealName, $fileData);

         }

     }

 }

 $zip->close();

 $file = fopen($filename, "r");

 Header("Content-type: application/octet-stream");

 Header("Accept-Ranges: bytes");

 Header("Accept-Length: " . filesize($filename));

 Header("Content-Disposition: attachment; filename=pdf.zip");

 //一次只传输1024个字节的数据给客户端

 $buffer = ; //

 while (!feof($file)) {

     //将文件读入内存

     $file_data = fread($file, $buffer);

     //每次向客户端回送1024个字节的数据

     echo $file_data;

 }

 fclose($file);

 unlink($filename);