Retrieve uploaded filepath of latest added file in php - php

Question

Lets start from the begining. I am a student and have recently had a course in webdevelopement with databases (Im sure the course has different name in english) and I am creating a dynamic website.
You can add, edit and remove sites/articles.
I wanted to be able to upload you own logo on your navbar neside your "tabs" but I have come to a dead end. I followed a guy on youtube that explained how to upload files to my server into a specific folder and limiting it to be only certain file types and a specific filesize.
But now i need to retrieve the filepath of that image so i can display it as a logo on my navbar on the website.
The way i started thinking was that i need to somehow get the latest modified file and then somehow get its location/filepath and then save it to a variable.
The current code i have for uploading an image is this:
its in the root folder and called "upload.php"
<?php
if (isset($_POST['upload'])) {
$file = $_FILES['file'];
/* $_FILES gives you an array of info of an file */
/* below i give each variable some info from my file */
$fileName = $_FILES['file']['name'];
$fileTmpName = $_FILES['file']['tmp_name'];
$fileSize = $_FILES['file']['size'];
$fileError = $_FILES['file']['error'];
$fileType = $_FILES['file']['type'];
/* Ext = extension.*/
/* i only want .jpg and. png files on my site */
/* Here i check if it has .jpg or png at the end of the file name */
$fileExt = explode('.', $fileName);
$fileActualExt = strtolower(end($fileExt));
/* Creating an array with accepted file endings */
$allowed = array('jpg', 'jpeg', 'png');
if (in_array($fileActualExt, $allowed)) {
if ($fileError === 0) {
if ($fileSize < 1000000) {
/* newimages get uniq names inside database */
/* in this case it uses milliseconds */
$fileNameNew = uniqid('', true).".".$fileActualExt;
/* set file destination */
$fileDestination = 'images/'.$fileName;
move_uploaded_file($fileTmpName, $fileDestination);
header('Location: index.php?uploadsuccess');
}else {
echo "Your file was to big! Make sure it's less than 1MB!";
}
}else {
echo "There was an error uploading your file! Please try again!";
}
}else {
echo "You cannot Upload files of this type!";
}
}
And then i need to put the filepath into a variable and then add it to:
<img src="images/file_name.jpg>" class="navbar-logo" alt="">
Then replace the file_name.jpg with my variable.
I dont understand how i can achieve this. I dont have the knowledge for it and i hope that turning to stackoverflow i can get some help and learn something new on the way.
I have searched and tried out this code:
(written inside of the "upload.php" file at the bottom, outside of the "if" statement.
/* get latest image name */
$path = "images";
$latest_ctime = 0;
$latest_filename = '';
$d = dir($path);
while (false !== ($entry = $d->read())) {
$filepath = "{$path}/{$entry}";
// could do also other checks than just checking whether the entry is a file
if (is_file($filepath) && filectime($filepath) > $latest_ctime) {
$latest_ctime = filectime($filepath);
$latest_filename = $entry;
}
}
Maybe i can't access the variable from the file im trying to get it from?
As mentioned, this file ("upload.php") is inside the root folder. Im trying to use the variable $latest_filename in the following place: root/views/master.php
I dont know what more to add, i tried making this as transparent as possible.