Hello i have three colums which i want to make users can upload pictures/videos and automaticly to add to one of the colums but i cannot figure out how to do that... here is the HTML code i have

<div class="main">
    <div class="row">
        <div class="col-md-3">
            <div class="panel panel-default">
                <div class="panel-body">
                    Picture/Video
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="panel panel-default">
                <div class="panel-body">
                    Picture/Video
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="panel panel-default">
                <div class="panel-body">
                    Picture/Video
                </div>
            </div>
        </div>
    </div>
</div>

and also the fourth column to be fixed at the right side

Please if anyone could help me with this problem ?

Where's your upload code?

Here it is from w3schools..

upload.php

<?php
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {
        echo "File is an image - " . $check["mime"] . ".";
        $uploadOk = 1;
    } else {
        echo "File is not an image.";
        $uploadOk = 0;
    }
}
// Check if file already exists
if (file_exists($target_file)) {
    echo "Sorry, file already exists.";
    $uploadOk = 0;
}
// Check file size
if ($_FILES["fileToUpload"]["size"] > 500000) {
    echo "Sorry, your file is too large.";
    $uploadOk = 0;
}
// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
    echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
    $uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
    } else {
        echo "Sorry, there was an error uploading your file.";
    }
}
?>

So you only have files. Then you need to list them all, and generate the output html. You can use glob to get the files from your upload folder.