sell controller

<?php
    require("../includes/config.php"); 

    $rows = query("SELECT * FROM Stock WHERE id = ?", $_SESSION["id"]);

    foreach ($rows as $row)
    {
        $positions[] = ["symbol" => $row["symbol"]];
    }
    
    query("DELETE FROM Stock WHERE id = ? AND symbol = ?", $_SESSION["id"], $_POST["menu"]);
    
    render("sell.php", ["positions" => $positions, "title" => "Sell"]);
?>

sell template

<div id=sell>
    <fieldset>
        <form name="menu" action="sell.php" method="POST">
            <select>
                <?php foreach ($positions as $position): ?>
                    <option value="<?= $position["symbol"]?>"><?= $position["symbol"] ?> </option>
                <?php endforeach ?>
            </select>
            <button type="submit" class="btn btn-default">Sell</button>
        </form>
   </fieldset>
</div>
<div>
    <a href="/">Home</a>
<div>