Upload-class

<?php
$uni_id = 123456789;


if(isset($_FILES['img'])){
    $img = $_FILES['img'];

    print_r($img);
    echo "<br />";
    // File Properties
    $img_name  = $img['name'];
    $img_tmp   = $img['tmp_name'];
    $img_size  = $img['size'];
    $img_error = $img['error'];

    // Work Out The File extension
    $img_ext     = explode('.', $img_name);   // Java = split to array
    $img_ext     = strtolower(end($img_ext)); // last index the array ( file_ext )
    $allowed_img = array('jpg','jpeg','png');

    if (in_array($img_ext, $allowed_img))    {
        if ($img_error === 0) {

            if ($img_size <= 4194000) { // max 4 MB
                    echo "3";

                $img_name_new = $uni_id.'.'.$img_ext;  // change this to book name ( Random )

                $path_img     = "../books/".$uni_id.'/';            // Create a folder if it doesn't already exist  (need work)
                if (!file_exists($path_img)) { mkdir($path_img, 0777, true);        echo "4";
}

                $img_destination = $path_img.$img_name_new;
                if (move_uploaded_file($img_tmp, $img_destination)) {
                            echo "5";

                }

            }
        }
    }

}
?>

<?php
if(isset($_FILES['file'])){
    $file = $_FILES['file'];

    print_r($file);
        echo "<br />";

    // File Properties
    $file_name  = $file['name'];
    $file_tmp   = $file['tmp_name'];
    $file_size  = $file['size'];
    $file_error = $file['error'];

    // Work Out The File extension
    $file_ext = explode('.', $file_name);   // Java = split to array
    $file_ext = strtolower(end($file_ext)); // last index the array ( file_ext )
    $allowed  = array('rar','zip','7z');

    if (in_array($file_ext, $allowed))   {
        if ($file_error === 0) {
            if ($file_name <= 268400000 ) { // max 100 MB

                $file_name_new = $uni_id.'.'.$file_ext;  // change this to book name ( Random )

                $path = "../books/".$uni_id.'/';   // Create a folder if it doesn't already exist
                if (!file_exists($path)) { mkdir($path, 0777, true); }

                $file_destination = $path.$file_name_new;
                if (move_uploaded_file($file_tmp, $file_destination)) {

                }

            }
        }
    }

}
?>



<?php
if(isset($_FILES['up_book'])){
    $up_book = $_FILES['up_book'];

    print_r($up_book);
        echo "<br />";

    // up_book Properties
    $up_book_name  = $up_book['name'];
    $up_book_tmp   = $up_book['tmp_name'];
    $up_book_size  = $up_book['size'];
    $up_book_error = $up_book['error'];

    // Work Out The up_book extension
    $up_book_ext = explode('.', $up_book_name);    // Java = split to array
    $up_book_ext = strtolower(end($up_book_ext));  // last index the array ( up_book_ext )
    $allowed_BOOK   = array('pdf','doc','docx','epub','ppt','pptx');

    if (in_array($up_book_ext, $allowed_BOOK))   {
        if ($up_book_error === 0) {
            if ($up_book_name <= 104900000) { // max 100 MB

                $up_book_name_new = strtolower($up_book_name).'.'.$up_book_ext;  // change this to book name

                $path_up_book = "../books/".$uni_id.'/';   // Create a folder if it doesn't already exist
                if (!file_exists($path_up_book)) { mkdir($path_up_book, 0777, true); }

                $up_book_destination = $path_up_book.$up_book_name_new;
                if (move_uploaded_file($up_book_tmp, $up_book_destination)) {
                }

            }
        }
    }

}
?>