php文件上传与下载
php文件上传可以用move_uploaded_file()函数
但是文档没有介绍文件下载的方法 我也找不到 move_downloaded_file()函数
我想下载用move_uploaded_file() 让它从你上传的目录传到你指定的下载目录,这样感觉怪怪的.
哪位大哥分享下php文件下载的方法.
回复讨论(解决方案)
上传可以move_uploaded_file, 是因为上传的文件已经在服务器上
下载自然不能move_uploaded_file,因为文件是在服务器上的,你下载是要下载到客户端的。。。
最简单的方式下载
如果不想暴露文件地址。
可以用:
header("xxxxxxxxxx");
readfile("文件");
将文件内容吐给浏览器去下载。
下载的资料,google, baidu 一下,还是蛮多的。。
上传可以move_uploaded_file, 是因为上传的文件已经在服务器上
下载自然不能move_uploaded_file,因为文件是在服务器上的,你下载是要下载到客户端的。。。
最简单的方式下载
如果不想暴露文件地址。
可以用:
header("xxxxxxxxxx");
readfile("文件");
将文件内容吐给浏览器去下载。
下载的资料,google, baidu 一下,还是蛮多的。。
header("xxxxxxxxxx");这句的作用是干什么的?
如果单单readfile("文件"); 浏览不会弹出下载框,只显示文件里的内容
<?php $file = 'test.zip'; $filename = '中文.zip'; if(file_exists($file)){ $user_agent = $_SERVER['Http_User_agent']; $encode_filename = rawurlencode($filename); if(preg_match("/MSIE/", $user_agent)){ header('content-disposition:attachment; filename="'.$encode_filename.'"'); }else if(preg_match("/Firefox/", $user_agent)){ header("content-disposition:attachment; filename*=\"utf8''".$filename.'"'); }else{ header('content-disposition:attachment; filename="'.$filename.'"'); } readfile($file); } ?>
下载。
<?php $file = 'test.zip'; $filename = '中文.zip'; if(file_exists($file)){ $user_agent = $_SERVER['Http_User_agent']; $encode_filename = rawurlencode($filename); if(preg_match("/MSIE/", $user_agent)){ header('content-disposition:attachment; filename="'.$encode_filename.'"'); }else if(preg_match("/Firefox/", $user_agent)){ header("content-disposition:attachment; filename*=\"utf8''".$filename.'"'); }else{ header('content-disposition:attachment; filename="'.$filename.'"'); } readfile($file); } ?>
下载。
下载文件的时候为什么要判断是那种浏览器(preg_match("/Firefox/", $user_agent)?
header('content-disposition:attachment; filename="'.$encode_filename.'"');
header('xxx')这句是有什么用,我去掉的时候readfile($file) 就把文件的内容显示在浏览器,也没有弹出下载框
<?php $file = 'test.zip'; $filename = '中文.zip'; if(file_exists($file)){ $user_agent = $_SERVER['Http_User_agent']; $encode_filename = rawurlencode($filename); if(preg_match("/MSIE/", $user_agent)){ header('content-disposition:attachment; filename="'.$encode_filename.'"'); }else if(preg_match("/Firefox/", $user_agent)){ header("content-disposition:attachment; filename*=\"utf8''".$filename.'"'); }else{ header('content-disposition:attachment; filename="'.$filename.'"'); } readfile($file); } ?>
下载。
下载文件的时候为什么要判断是那种浏览器(preg_match("/Firefox/", $user_agent)?
header('content-disposition:attachment; filename="'.$encode_filename.'"');
header('xxx')这句是有什么用,我去掉的时候readfile($file) 就把文件的内容显示在浏览器,也没有弹出下载框
设置文件头,当浏览器接收到头时,会激活文件下载对话框

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