<?php Header( "Content-type:   application/octet-stream "); Header( "Accept-Ranges:   bytes "); header( "Content-Disposition:   attachment;   filename=test.txt "); header( "Expires:   0 "); header( "Cache-Control:   must-revalidate,   post-check=0,   pre-check=0 "); header( "Pragma:   public "); echo "测试\r\n";echo "测试\r\n";echo ‘输入的内容为文本文件的内容‘?>