//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

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