Script Not Reading String - php

Question

I have a php script that uploads a profile picture to the server and then edits a field in the DB.
At the top of the script, I've added a line of code that will create a new folder in a directory, that's labeled by the user's id. The ID is echoed with $id. This works for the folder, but when I set the upload path to something like ../img/users/$id, it uploads to ..img/users instead.
CODE:
<?php
require '../login_check.php';
include_once 'db_connect.php';
$dir = "../img/users/$id";
if( is_dir($dir) === false )
{
mkdir($dir);
}
fclose($file);
$dir = "./users/$result[id]";
if( is_dir($dir) === false );
$path_to_image_directory = "../img/users/$id";
if(isset($_FILES['imgupload']))
{
$id = $_SESSION['id'];
if ($_FILES["imgupload"]["size"] > 500000)
{
header('Location: ../profile');
}
if(preg_match('/[.](jpg)|(JPG)|(gif)|(GIF)|(PNG)|(png)$/',
$_FILES['imgupload']['name']))
{
$source = $_FILES['imgupload']['tmp_name'];
$randString = md5(time());
$filename = $_FILES['imgupload']['name'];
$splitName = explode(".", $filename);
$fileExt = end($splitName);
$newfilename = strtolower($randString.'.'.$fileExt);
$target = $path_to_image_directory . $newfilename;
move_uploaded_file($source, $target);
$updatestmt = $conn->prepare("UPDATE members SET profilepic= ? WHERE id = ?");
$updatestmt->bind_param("si", $newfilename, $id);
$updatestmt->execute();
header('Location: ../profile');
}
else
{
header('Location: ../profile');
}
}
?>
Can anyone tell me what I did wrong and how to fix this?

Answer 1

You are using $id variable before assigning $_SESSION['id'] value to it.
First you have to assign the value to $id
$id = $_SESSION['id'];
Then use this $id to setting directory path variable.
$path_to_image_directory = "../img/users/$id";
Make sure your $_SESSION['id'] is not empty/null

Answer 2

Move $id = $_SESSION['id']; to below include_once 'db_connect.php';