PHP上传进度会话

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!

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

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.

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