PHP简单文件下载函数

header("Content-Type; text/html; charset=utf-8");
class DownFile {
public static function File($_path,$file_name) {
//解决中文乱码问题
$_path=$_path.$file_name;
//判断文件是否存在
if (!file_exists($_path)) {
exit('文件不存在');
}
$_path=iconv('utf-8','gb2312',$_path);
$file_size=filesize($_path);
$fp=fopen($_path,'r');
header("Content-type: application/octet-stream");
header("Accept-Ranges: bytes");
header("Accept-Length: $file_name");
header("Content-Disposition: attachment; filename=$file_name");
$buffer=1024;
$file_count=0;
while (!feof($fp) && ($file_size-$file_count>0)) {
$file_data=fread($fp,$buffer);
$file_count+=$buffer;
echo $file_data;
}
fclose($fp);
}
}
//路径
$path='../';
//文件名
$file_name='filelist.php';
DownFile::File($path,$file_name);
?>

$_path=iconv('utf-8','gb2312',$_path);
$file_size=filesize($_path);
$fp=fopen($_path,'r');
header("Content-type: application/octet-stream");
header("Accept-Ranges: bytes");
header("Accept-Length: $file_name");
header("Content-Disposition: attachment; filename=$file_name");
$buffer=1024;
$file_count=0;
while (!feof($fp) && ($file_size-$file_count>0)) {
$file_data=fread($fp,$buffer);
$file_count+=$buffer;
echo $file_data;
}

$_path=iconv('utf-8','gb2312',$_path);
$file_size=filesize($_path);
$fp=fopen($_path,'r');

header("Content-type: application/octet-stream");
header("Accept-Ranges: bytes");
header("Accept-Length: $file_name");
header("Content-Disposition: attachment; filename=$file_name");

$buffer=1024;
$file_count=0;
while (!feof($fp) && ($file_size-$file_count>0)) {
$file_data=fread($fp,$buffer);
$file_count+=$buffer;
echo $file_data;