Recursive directory with mkdir not working - php

Question

I am uploading multiple images within a single category and I would like to store each group of images in a unique directory within my 'images/' directory as follows:
'images/unique_category/image1.jpg'
I have the following code but it is not creating a directory. I suspect it has something to do with setting the recursive parameter as 'true' which I believe I have done. Am I using the mkdir function incorrectly?
Thank you!
$unique_directory = "../images/".$_POST['item_name'];
if (is_dir($unique_directory)
{
move_uploaded_file($_FILES["file"]["tmp_name"],
$unique_directory."/".$_FILES["file"]["name"]);
echo "Stored in: " . $unique_directory."/".$_FILES["file"]["name"];
}
else
{
mkdir($unique_directory, 0777, true);
move_uploaded_file($_FILES["file"]["tmp_name"],
$unique_directory."/".$_FILES["file"]["name"]);

Answer 1

Here, give this a try. I tested it on my (hosted) server and it works. Yet, I tested it by placing the files in the root of it, and used images instead of ../images for the $unique_directory variable.
I also used the chmod command apart from the other function, because the other method did not work.
N.B.: If possible, try changing 0777 to 0755, because using 0777 is not the safest setting.
<?php
$filename = $_POST['item_name'];
$unique_directory = "../images";
if (!is_dir($unique_directory . '/' . $filename)){
mkdir($unique_directory . "/" . $filename);
chmod("$unique_directory" . "/" .$filename, 0777);
}
if (is_dir($unique_directory))
{
move_uploaded_file($_FILES['file']['tmp_name'], $unique_directory . "/" . $filename . "/" . $_FILES['file']['name']);
echo "1) Stored in: " . $unique_directory . "/" . $filename . "/" . $_FILES['file']['name'];
}
else
{
move_uploaded_file($_FILES['file']['tmp_name'], $unique_directory . "/" . $filename . "/" . $_FILES['file']['name']);
echo "2) Stored in: " . $unique_directory . "/" . $filename . "/" . $_FILES['file']['name'];
}
?>