php强制下载文件
由于现在的浏览器已经可以识别格式为txt的文档格式,所以如果只是给txt文档做一个文字链接的话,可能只是打开一个新窗口显示txt文件的内容,并不能实现点击下载的目的。We have to do something else.
当然这个问题的解决办法也可以是你将你的txt文件改名为浏览器不认识的文件,比如rar,这样的话点击,浏览器不认识就只好让用户下载了。
下面这个文件就是通过设置header设置文档的格式来实现点击下载的目的,将上个页面传递过来的文件点击可以下载。
$filename = "/somepath/".$_GET[file].".txt"; //要下载的文件名
header("Content-Type: application/force-download");
header("Content-Disposition: attachment; filename=".basename($filename));
readfile($filename);
?>
首先:设置Content-Type的值为application/force-download,强制下载
接着第二个header函数设置了要下载的文件,注意这里filename是不包含路径的文件名,所以用basename过滤掉路径名。这个filename的值将来就是点击下载后弹出对话框里面的文件名.
最后就是readfile,将文件流输出到浏览器,这样就实现了txt文件的下载,其他类型的类似。

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