Force File Download With PHP Using Header()

Force file download with php using header()

The problem was that I used ajax to post the message to the server, when I used a direct link to download the file everything worked fine.

I used this other Stackoverflow Q&A material instead, it worked great for me:

• Ajax File Download using Jquery, PHP

Force-downloading, from php file

THis is hard - most php configuration will fail after 30 seconds. If you own php.ini you can change that to longer limit. But still - is that even worth it? I mean - the files can get bigger or network slower - and once more you will hit the timeout.

This is why downloaders were made - to download big files in smaller chunks Half Crazed showed you code for that i THIS answer (its not only one - this only takes into account one of the ways clients negotiate the transfers - but still its a good start).

Mega.co.nz for example uses new html5 features. Downloads the file in browser using chunks, joining the file on user and and then ,,downloading'' it from the browser disk space. It can resume files, pause files and so on. (Sorry - no code for that as it would be quite big and include more than one language (php, js)).

PS: change yours readfile($path); into:

$handle=fopen($path, 'rb');
while (!feof($handle))
{
    echo fread($handle, 8192);
    flush();
}
fclose($handle);

This will not load WHOLE file into memory, just parts of 8KiB at once and then send them to user.

Force image download with php using header() in smartphones and tablets

I got it!

There were differents problems. I found the clear solution in comments from this post:
http://www.digiblog.de/2011/04/android-and-the-download-file-headers/

header("Content-Type: application/octet-stream");
header('Content-Disposition: attachment; filename="test.JPG"');

The important steps: I send everything with a form. The form, to make it work in mobiles, needs to have the target='_top' and the method='get'

It also make errors if the extention (jpg) is not in UPPERCASE and the file name is not between " ".

Now it works in all devices that I try by far. :)

Special thanks to Jörg Wagner, author of the post.

Force download of multiple files with header() in php

You can only transfer one file from server side at a time. Typical workarounds are:

1. tar/zip them up into one file on server side.
2. use javascript to window.open multiple files for download.

php force download using header() broken downloaded file

I can't help you on specific php-portlet problems (I never used Liferay with php) but it sounds like you get the whole page HTML generated "around" your downloaded file. This is what you get when you just render a portlet: A portlet is always embedded in a HTML page, thus you cannot provide specific headers on the HTTP level with the standard render output of a portlet.

What you want is the serveResource lifecycle phase of a portlet. This will allow you to serve content that is not part of the page, but you have full control over the download and HTTP headers. How to do that with php portlets, I'll have to leave to you.

Edit (additional information): As you asked in the comments, I found an older (might need to be adapted) Wiki article that talks about using state=exclusive to do the same trick - instead of the serveResource that I suggested above. I don't know if this is due to the age of the article or because PHP portlets don't support that lifecycle, but you might find something there and in the related&linked articles. Note: serveResource would - if I'm not mistaken - generate a p_p_lifecycle=2 parameter, while this example uses p_p_lifecycle=0 (render) and p_p_state=exclusive. Try if this fits your requirements

However, please consider Marc B's comment about your code being insecure and too hardcoded. There are better solutions for the underlying problem - e.g. Liferay provides the Document Library to up/download files out of the box. And that doesn't have these problems.

php file force download

I've had a chance to work it out. Your problem is two-fold.

First, remove the www. from the url.

Second, remove the call to filesize($file) which is throwing an error because PHP doesn't know the size of the file before it downloads the file. (really, just remove the whole line)

Removing these two things, I was successful.

force a file download with PHP, headers

Try putting

global $row, $thefile;

as a first line inside your filedownload()-function. I notice you're trying to use variables from outside this function.

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