PHP Upload Progress Session

Question

I am trying to create an upload progress bar with PHP. I saw the new feature of PHP 5.4: upload progress session.

This is my HTML code:

<form id="upload" action="ajax/progress.php" method="POST" enctype="multipart/form-data">
    <input type="hidden" name="<?php echo ini_get("session.upload_progress.name"); ?>" value="dupload" />
    <input id="file1" type="file" name="file1" />
    <input class="btn primary" type="submit" value="Upload" />
</form>

And this is progress.php:

<?php
session_start();

$key = ini_get("session.upload_progress.prefix") . 'dupload';

if (!empty($_SESSION[$key])){
    $current = $_SESSION[$key]["bytes_processed"];
    $total = $_SESSION[$key]["content_length"];
    echo $current < $total ? ceil($current / $total * 100) : 100;
}
else {
    var_dump($_SESSION);
    var_dump($_FILES);
}

AJAX:

$('#upload').submit(function () {
    interval_id = setInterval(function () {
        $.ajax({
            url: "ajax/progress.php6",
            type: "POST",
            success: function (data) {
                console.log(data);
            }
        });
    }, 200);
    return false;
});

All the ini settings are right. (session is enabled, name and prefix is right)

I am always getting an empty session array. What's wrong?

Thanks!

Your reading not writing to the session... how woukd it ever not be empty — rlemon
– rlemon, Commented Jul 13, 2012 at 19:17
What do you mean? There's nothing in the doc saying I should manually write to the session, it should write it automatically. — AdamGold
– AdamGold, Commented Jul 13, 2012 at 20:52
Yup, php6 extension is required in my server if I want to use PHP 5.4.. — AdamGold
– AdamGold, Commented Jul 13, 2012 at 21:04
Are you running PHP via FastCGI? php.net/manual/en/session.upload-progress.php#109091 — gen_Eric
– gen_Eric, Commented Jul 13, 2012 at 21:04

AdamGold · Accepted Answer · 2012-07-14 15:55:25Z

1

Wasn't able to sort it out so I used XMLHTTPREQUEST "progress" action and that worked well. Thanks!

answered Jul 14, 2012 at 15:55

AdamGold

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1 Comment

Jacek Kowalewski Over a year ago

I think, that this one SHOULD not be accepted ;). Maybe it is a solution, but ABSOLUTELY it isn't an answer...

gen_Eric · Accepted Answer · 2012-07-13 21:00:19Z

0

It's not possible in one POST request, you can do AJAX requests, and read session while file is uploading. After file is uploaded, the session.upload_progress.name key is removed so you are getting an empty array.

edited Jul 13, 2012 at 21:00

gen_Eric

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answered Jul 13, 2012 at 19:50

Władysław Koszałko

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2 Comments

AdamGold Over a year ago

Well I also tried settings an AJAX request every second after a form submit, empty array as well.

Władysław Koszałko Over a year ago

What server u use ? if nginx there are some problems with this new feature of php, and i have to use iframe+apache to handle progress bars : )

ATilara · Accepted Answer · 2012-09-10 05:00:39Z

0

I think it's because your form is not getting submitted, as you have return false in

$('#upload').submit(function () {
    interval_id = setInterval(function () {
        $.ajax({
            url: "ajax/progress.php6",
            type: "POST",
            success: function (data) {
                console.log(data);
            }
        });
    }, 200);
    return false;
});

and it initializes interval, so the page always return null as nothing is being uploaded. Try using http://www.malsup.com/jquery/form, it submits form

answered Sep 10, 2012 at 5:00

ATilara

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