I have a php script that I wrote with a lot of help from internet and I do not fully understand what is going on. It is an upload tool which is supposed to send files uploaded to my website in a folder on the server called uploads. It works perfectly well when I use xampp, but when I run it on a remote server, that my university provided me, the script saves the files in its root folder, instead of sending them in the "uploads" folder that I created there.
I tried specifying the directory in different ways, but since it works on my computer and doesn't on the university server I got no idea what to do. The university server works with apache2 and on my computer I used the latest version of xampp for local testing.
index.html and upload.php are in the same folder and there is a subfolder called "uploads" on both of the computers.
<?php
if(isset($_POST['submit'])){
    $file = $_FILES['file'];
    $fileName = $_FILES['file']['name'];
    $fileTmpName = $_FILES['file']['tmp_name'];
    $fileSize = $_FILES['file']['size'];
    $fileError = $_FILES['file']['error'];
    $fileType = $_FILES['file']['type'];
    $fileExt=explode('.', $fileName);
    $fileActualExt = strtolower(end($fileExt));
    $allowed = array('cvs');
    if(in_array($fileActualExt, $allowed)) {
        if($fileError === 0){
            if($fileSize < 100000){
                $fileNameNew = uniqid('', true).".".$fileActualExt;
                $fileDestination = 'uploads/'.$fileNameNew;
                move_uploaded_file($fileTmpName, $fileDestination);
                header("Location: index.php?uploadsuccess");
            } else {
                echo "Your file is too big!";
            } 
        } else {
            echo "There was an error uploading your file!";
        }
    } else {
        echo "You cannot upload files of this type!";
    }
}
?>
I expected the files to be in uploads, but they go in the same folder as the script instead.
 
    