How to display one item in my item details page from my item page using PHP/MYSQL

Okay So Here I'm trying to link a Item details page to a Item page, I have successfully done so however when I click on an item all the item details are showing up I would like to know how to Only Display one item on the item details page for the corresponding id. I know I'm missing some code (think its a GET or POST variable) to complete the link if anyone can help it will be much appreciated thanks alot

Heres my code

item.php

            <div class="rone">
            <?php
        $conn = new mysqli("xxx", "xxx", "xxx", "xxx");
        if ($conn->connect_error) {
            die("Connection Failed!" . $conn->connect_error);
        }
        ?>
            <?php
                $stmt = $conn->prepare('SELECT * FROM items');
                $stmt->execute();
                $result = $stmt->get_result();
                while ($row = $result->fetch_assoc()):
            ?>

            <div class="col-4">
                <a href="item-details.php?id<?= $row['id'] ?>"><img src="<?= $row['itemimage'] ?>"></a>
                <h4"><?= $row['item_name'] ?></h4>
           </div>
           
            <?php endwhile; ?>                                                           
            </div>

item-details.php

            <div class="rone">
            <?php
        $conn = new mysqli("xxx", "xxx", "xxx", "xxx");
        if ($conn->connect_error) {
            die("Connection Failed!" . $conn->connect_error);
        }
        ?>
            <?php
                include 'config.php';
                $stmt = $conn->prepare('SELECT * FROM items');
                $stmt->execute();
                $result = $stmt->get_result();
                while ($row = $result->fetch_assoc()):
            ?>
            <div class="col-2">
                <img src="<?= $row['itemimage'] ?>" width="100%" id="ItemImg">                
            <?php endwhile; ?>
            </div>
            <div class="col-2">
                <h1><?= $row['item_name'] ?></h1>
            </div>
    </div>

the names of my rows are: id , itemimage, item_name and in time to come I will add other attributes And the main table is items.

source https://stackoverflow.com/questions/68581403/how-to-display-one-item-in-my-item-details-page-from-my-item-page-using-php-mysq