<?php 	header("Content-type=html/text;charset=utf-8"); 	function download($file_name,$file_sub_dir)	{		$file_name = iconv("utf-8","gb2312",$file_name);		$file_path = $_SERVER[‘DOCUMENT_ROOT‘].$file_sub_dir.$file_name;		if(!file_exists($file_path))		{			echo "文件不存在";			return;		}					$fp = fopen($file_path,"rb");		$file_size = filesize($file_path);		header("Content-type: application/octet-stream");		header("Accept-Ranges: bytes");		header("Accept-Length: $file_size");		header("Content-Disposition: attachment;filename=".$file_name);					$buffer = 1024;		$file_count = 0;		while(!feof($fp) && $file_size-$file_count>0)		{			$file_data = http://www.mamicode.com/fread($fp,$buffer);"picture1.jpg","/txt/"); ?>