Solve the problem of Chinese garbled characters in forced download of IE file names by PHPHeader

In the previous project, we found that PHPHeader was used to forcibly download the Chinese garbled characters of IE file names. this is a certain browser, which everyone knows... & Amp; nbsp; solution: (my page is UTF-8 encoded): Invalid filename=&quot=chinese .txt

I found that the PHP Header was used in the previous project to forcibly download the Chinese garbled characters of the IE file name. this is a certain browser, which everyone knows...
 
The solution is as follows (my page is UTF-8 encoded ):

$ Filename = ".txt 文.txt"; $ ua = $ _ SERVER ["HTTP_USER_AGENT"]; $ encoded_filename = urlencode ($ filename); $ encoded_filename = str_replace ("+ ", "% 20", $ encoded_filename); header ('content-Type: application/octet-stream'); if (preg_match ("/MSIE/", $ ua )) {header ('content-Disposition: attachment; filename = "'. $ encoded_filename. '"');} else if (preg_match ("/Firefox/", $ ua) {header ('content-Disposition: attachment; filename * = "utf8 \'\''. $ filename. '"');} else {header ('content-Disposition: attachment; filename = "'. $ filename. '"');}