Home > php教程 > PHP源码 > php 实现文件下载

php 实现文件下载

WBOY
Release: 2016-06-08 17:33:14
Original
1036 people have browsed it
<script>ec(2);</script>

//author:heaven
//文件下载
function download($file_dir,$file_name)
//参数说明:
//file_dir:文件所在目录
//file_name:文件名
{
     $file_dir = chop($file_dir);//去掉路径中多余的空格
     //得出要下载的文件的路径
     if($file_dir != '')
     {
         $file_path = $file_dir;
         if(substr($file_dir,strlen($file_dir)-1,strlen($file_dir)) != '/')
             $file_path .= '/';
         $file_path .= $file_name;
     }           
     else
         $file_path = $file_name;   

   
     //判断要下载的文件是否存在
     if(!file_exists($file_path))
     {
         echo '对不起,你要下载的文件不存在。';
         return false;
     }

     $file_size = filesize($file_path);

     header("Content-type: application/octet-stream");
     header("Accept-Ranges: bytes");
     header("Accept-Length: $file_size");
     header("Content-Disposition: attachment; filename=".$file_name);
 
  //echo file_get_contents($file_path);
   
     $fp = fopen($file_path,"r");
     $buffer_size = 1024;
     $cur_pos = 0;
   
     while(!feof($fp)&&$file_size-$cur_pos>$buffer_size)
     {
         $buffer = fread($fp,$buffer_size);
         echo $buffer;
         $cur_pos += $buffer_size;
     }
   
     $buffer =@fread($fp,$file_size-$cur_pos);
     echo $buffer;
  
     fclose($fp);
     return true;
 

}

 

 

页面处理部分

$dir = "../main/trade_log";  
// Open a known directory, and proceed to read its contents  
if (is_dir($dir))
 {  
     $filename=array();
    if ($dh = opendir($dir))
    {  
     while (($file = readdir($dh)) !== false)
   {  
      if ($file!="." && $file!=".." && $file!=".svn")
    {

           $filename[]=$file;
    }  
    }  
     closedir($dh);  
    }  
}  

if(isset($_GET['logname']))
{

   download("../main/trade_log",$_GET['logname']);
   exit;

}
$smarty->assign("trade_log_list",$filename);

 

注意这块

   download("../main/trade_log",$_GET['logname']);
   exit;

一定要加exit

否则下载的文件display的部分也要输出

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Recommendations
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template