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header("Content-type: text/html;charset=utf-8");
if(strlen($FileName)
$FileName=iconv("utf-8","gb2312",$FileName);//进行文件名格式转换,以防中文乱码
//开始判断路径
if(!is_null($FilePath)&&strlen($FilePath)>1){
if(substr($FilePath,0,1)=='/'){//判断是否为绝对路径
$FilePath=$_SERVER['DOCUMENT_ROOT'].$FilePath;
}
if(substr($FilePath,-1)!="/"){//检查最后是否为 / 结尾
$FilePath=$FilePath.'/';
}
if(is_numeric(strpos($FilePath,":\"))){//检查是否为绝对路径
$FilePath=str_replace("/","\",$FilePath);
}
}elseif(strlen($FilePath)==1&&$FilePath!="/"){
$FilePath=$FilePath."/";
}else{
$FilePath="";
}
if(!file_exists($FilePath.$FileName)){
echo"下载失败：所要下载的文件未找到";return;
}
/*================================================
发送下载相关的头部信息
=================================================*/
header("Content-type: application/octet-stream");
header("Accept-Ranges: bytes");//按照字节大小返回
header("Accept-Length: $FileSize");//返回文件大小
header("Content-Disposition: attachment; filename=".$FileName);//这里客户端的弹出对话框，对应的文件名
/*================================================
开始下载相关
=================================================*/
$FileSize=filesize($FilePath.$FileName);
$File=fopen($FilePath.$FileName,"r");//打开文件
$FileBuff=512;
while($FileSize>=0){
$FileSize-=$FileBuff;
echo fread($File,$FileBuff);
}
fclose($File);
}
?>
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