php - How do I display a message after a file has been downloaded? -

i have php code , works fine.

header('content-type: application/zip'); header('content-disposition: attachment; filename="wtbak.zip"'); readfile($archivefilename); echo $archivefilename; unlink($archivefilename); 

my issue is, how give out message after last line (unlink) has been executed?

thanks!

assumptions:

1. the client user should receive message, kind of message sent client

2. the response binary

abstract:

1. sending binary information client along text response possible if mhtml format, used in mails , each browser has (some nto have) support multipart response. let not chose way

2. sending binary information respond 1 request (download file) , response request (status of download) - popular practice.

solution:

1. on server: persist status of download

   // pseudocode: log_download_event(seessionid, status='started')

   header('content-type: application/zip');

   header('content-disposition: attachment; filename="wtbak.zip"');

   readfile($archivefilename);

   echo $archivefilename;

   unlink($archivefilename);

   // pseudocode: log_download_event(seessionid, status='done')

2. on server: implement php respond status of download

   // pseudocode: $downloadstatus=get_download_status(sessionid)

   echo '{staus:' + $downloadstatus + '}'

3. on client: on event trigger download

   window.open("http://nowhere.com/download.php?resuorce=archive-file.zip");

   window.thetrackinterval = window.setinterval(trackdownload, 1000);

   var trackinterval = function(){

   $.get('ajax/test.html', function(data) {

   id(data.status=='ready'){      cleaninterval(window.thetrackinterval);      alert('download done');  } 

   });

   }

this solution start sending ajax requests server every 1 second asking "is download done" , when receive confirmation "yest done" client stop tracking , alert message

what missed: implementation of status persistence. not php guy - forgive me gap