Javascript, jQuery, PHP, Web Development

PHP Multiple Upload Progress Bar With Advanced Upload Control

Note: this article is DEPRECATED. Please use one the many great scripts on the internet, like blueimp’s jQuery file upload plugin.

tl;dr: this is on GitHub: https://github.com/Sammaye/multifile_ajax_uploader

First thing you need to do is install the uploadprogress extension for PHP:

apt-get install php5-pear
apt-get install php5-dev
pecl install uploadprogress

Afterwards open up your php.ini and add:

extension=uploadprogress.so

And, finally, restart (don’t reload) your server:

sudo /etc/init.d/apache2 restart
sudo servicee nginx restart
# etc

Believe it or not, but you now have PHP upload progress identification installed. Now you just need to make a script that will upload a file and display its progress. Shall we move on?

The JavaScript

var upload_timer;
var timeout = 5000;
var u_ids = [];

$(document).ready(function () {

    // Add a new upload form
    add_upload();

    // When the "Add new upload" link is clicked add a new upload form
    $('#add_upload_form').click(function () {
        add_upload();
        return false;
    });

});

/**
 * Stops an upload
 *
 * @param id
 */
function stop_upload(id) {

    var answer = confirm("Are you sure you wish to remove this upload?"), p_id = "#up_prog" + id;

    // Only remove the upload if it has not completed.
    if (answer && ($(p_id + " .uploadProgInner").css("width") != "100%") && ($("#container_outer" + id).length > 0)) {

        // Form ids and write the cancelling message
        var message_id = "#up_message_prog" + id;
        $(message_id).html("<b style='color:red;'>Cancelling...</b>");

        // Make the upload go away peacefully showing the user it has been cancelled.
        setTimeout(function () {
            $("#container_outer" + id).remove();
            u_ids.splice(u_ids.indexOf(id), 1);
        }, "2000");
    } else {
        if (($(id + " .uploadProgInner").css("width") == "100%") || ($("#container_outer" + id).length == 0)) {
            $("#general_error").show();
            $("#general_error span").html("<h2>File Upload Could Not Be Removed</h2><p>The file upload could not be removed. This is most likely due to the file having had already been completed or already removed by some other means.</p>");
        }
    }
}

/**
 * This function runs when a upload is submitted. It checks the
 * file field as best it can for a valid file. TBH there are some things
 * we just have to do AFTER the file has been uploaded to /temp
 *
 * @param id
 * @returns {Boolean}
 */
function check_upload(id) {
    var file = $("#" + id).val(), end = file.length, start = end - 5;

    var ext = file.substring(start, end);

    // Is the file a divx extension?
    if (ext == ".divx") {
        $("#uploadForm-outer" + id).hide();
        $("#up_prog" + id).show();
    } else {
        $("#general_error").show();
        $("#general_error span").html("<h2>Wrong File Type</h2><p>You attempted to upload a file type that is not supported by this uploader. Pleae try again soon, we hope to have support for mkv, avi and other formats in their raw form.</p>");
        return false;
    }
}

/**
 * This adds a new upload form to the screen
 */
function add_upload() {

    var ts, count;

    // We make a ts as a cache buster for shit browsers cough-Opera-cough
    ts = Math.round(new Date().getTime() / 1000);

    // How many forms already exist?
    count = $(".uploadFormContainer").length;

    // So long as limit has not been reached (10)
    if (count < 10) {

        // Generate the form
        $.get("/upload/add", {ts: ts}, function (data) {

            // Add to the page
            $("#uploadForm_container-outer").append(data);

            // If this is the first form then add the updater iframe
            if (count == 0 && $('#uInfo_ifr').length == 0) {
                $("#u_iframe_container").html("<a href=" / upload / getInfo
                ">/upload/getInfo</a>"
            )
                ;
            }

            // Add the upload id to the list of IDs
            var e = $(".uploadFormContainer").last().find("input[name=UPLOAD_IDENTIFIER]").val();
            count_ids = u_ids.length;
            u_ids[count_ids] = e;
        });

    } else {

        // Show upload limit error
        $("#general_error").show();
        $("#general_error span").html("<h2>Upload Limit Reached</h2><p>This form has been limited to 10 uploads to protected internet connections. If you are sure you understand what your ISP allows you to upload you can open a new window and continue uploading there.</p>");
    }
}

/**
 * This gets the updated status of the uploads
 *
 * @param info
 */
function update_progress(info) {

    // Scrolls through the IDs assigning the information.
    for (i = 0; i < info.length; i++) {

        // Sometimes uploadprogress can return null for a upload
        if (info[i] != null) {

            // Calculate how much has been uploaded
            var done = Math.floor(100 * parseInt(info[i].uploaded) / parseInt(info[i].total));

            // Ascertain the IDs for the elements needing change
            var id = "#up_prog" + info[i].id;
            var message_id = "#up_message_prog" + info[i].id;

            // Change the width of the progress bar to match done and set a message for the upload status
            $(id + " .uploadProgInner").css("width", done + "%");
            $(message_id + " span").html(done + "% Completed of " + info[i].file + " - Estimated Time Left: " + info[i].left + " at " + info[i].speed + "ps");
        }
    }

}

The Upload Form

Now we have the JavaScript we need the upload form itself. This form will be rendered every time add_upload() is called within the JavaScript whilst the user is under the upload limit:

<?php
global $session;
$u_id = strval(new MongoId());
?>
<div class="uploadFormContainer" id="container_outer<?php echo $u_id ?>">
    <div class="uploadForm" id="uploadForm-outer<?php echo $u_id ?>">

        <h2>Please select a file to upload</h2>

        <form 
            onsubmit='check_upload("<?php echo $u_id ?>")' 
            action="/upload/to_server" 
            target="u_ifr<?php echo $u_id ?>" 
            method="post" 
            enctype="multipart/form-data"
        >
            <input type="hidden" name="UPLOAD_IDENTIFIER" value="<?php echo $u_id ?>"/>
            <input type="file" name="<?php echo $u_id ?>" id="<?php echo $u_id ?>"/>

            <input type="submit" value="Upload" class="uploadFormSubmit"/>
        </form>


    </div>

    <div class="uploadBar" id="up_prog<?php echo $u_id ?>">
        <div class="uploadProgOuter">
            <div class="uploadProgInner">&nbsp;</div>
        </div>
        <div class="up_message_prog" id="up_message_prog<?php echo $u_id ?>">
            <span>Connecting to server...</span>
            <a href="javascript:;" class="cancel_uploadForm" onclick='stop_upload("<?php echo $u_id ?>")'>
                <b>Cancel</b>
            </a>
        </div>
        <div id="up_err<?php echo $u_id ?>"></div>
    </div>
</div>

The Progress Update Page

Now we have a form up and running (I will let you decipher the form :P) we just need the progress update page:

<?php
// A nice little hack for telling IE we wont abuse iframe permissions
header('P3P: CP="CAO PSA OUR"');
global $session;
?>
<html>
    <head>
        <title>Upload Info Page</title>
    
        <script type="text/javascript">
    
            // Get the u_ids from the parent window
            var u_ids = parent.u_ids, id_url = "";
    
            // Run the initial function
            refreshiframe();
    
            function refreshiframe() {
    
                // Get the url formatted version of u_ids (upload IDs)
                if (u_ids != null && u_ids.length > 0) {
                    for (i = 0; i<u_ids.length; i++) {
                        // return an url of the current id
                        if (i == 0) {
                            id_url = id_url + "ids[]="+u_ids[i];
                        } else {
                            id_url = id_url + "&ids[]="+u_ids[i];
                        }
                    }
                } else {
                    id_url = "ids[]=0";
                }
    
                // if php detects the set $_GET then delay the refresh else do it now
                <?php if (empty($_GET['ids']) && !isset($_GET['ids'])) { ?>
                    redirect();
                <?php }else{ ?>
                    setTimeout("redirect()",5000);
                <?php } ?>
            }
    
            function redirect() {
                // redirect with full url encoded u_ids
                parent.uInfo_ifr.location.href="/upload/getInfo?"+id_url;
            }
        </script>
    
    </head>
    
    <body>
        <script type="text/javascript">
        
            var info = [];
        
            <?php for ($i = 0; $i<count($_GET['ids']); $i++) {
        
                $upload_id = $_GET['ids'][$i];
        
                // This is our magic function. It gets our upload information
                $info = uploadprogress_get_info($upload_id);
        
                // We format the data to be printed into JS JSON arrays and echo it to screen
                if (!empty($info) && $info) { ?>
                    info[<?php echo $i ?>] = {'id':'<?php echo $upload_id ?>', 'file':'<?php echo $info['filename'] ?>', 'uploaded':<?php echo $info['bytes_uploaded'] ?>, 'total':<?php echo $info['bytes_total'] ?>, 'left':'<?php echo gmdate("H:i:s", $info['est_sec']) ?>', 'speed':'<?php echo convert_size_human($info['speed_average']) ?>'};
                <?php } else { ?>
                    info[<?php echo $i ?>] = null;
                <?php } ?>
        
            <?php } ?>
        
            // Now lets update the upload progress
            parent.update_progress(info);
        
        </script>
    </body>
</html>

The Page

Now we need the other page this all goes into:

<div class="UIMessage error UIMessageConstrained UIUploadErrorMessage" id="general_error">
    <span></span>
</div>

<div class="upload_container">

    <div id="uploadForm_container-outer"></div>

    <div id="u_iframe_container" class="u_iframe_container"></div>

    <a href="" id="add_upload_form">Add new upload</a>

</div>

Believe it or not, but that is it! You now know how to make a progress bar in PHP. Remember, this isn’t flash and nor is it HTML 5, it will work on any browser with almost any settings so long as they don’t have JavaScript turned off :P. All you need to do now is style it. Here is my style sheet to get you started:

.upload_container {
    width: 600px;
    margin: auto;
}

.uploadFormContainer {
    padding: 10px;
    border: 1px solid #C9D7F1;
    margin-bottom: 10px;
}

.uploadForm {
    border: 1px solid #E1ECFE;
    background: none repeat scroll 0 0 #F0F6FF;
    padding: 10px;
}

.uploadForm h2 {
    margin-bottom: 10px;
}

.uploadFormSubmit {
    float: right;
    font-weight: bold;
}

.uploadBar {
    display: none;
}

.uploadProgOuter {
    background: white;
    height: 40px;
    padding: 2px;
    border: 1px solid #73A6FF;
}

.uploadProgInner {
    background: #73A6FF;
    width: 10%;
    height: 40px;
}

.up_message_prog {
    margin-top: 7px;
}

.u_iframe_container {
    display: none;
}

.UIUploadErrorMessage {
    display: none;
    margin: 15px auto;
}

This style produces this result (or close anyway):

Any questions? If so, just write a comment, otherwise; enjoy :).

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