index.php

<?php

    // configuration
   require("../includes/config.php");
    // if form was submitted
    if ($_SERVER["REQUEST_METHOD"] == "POST")
    {
        // validate submission
        if (empty($_POST["username"]))
        {
            apologize("You must provide your username.");
        }
       if (empty($_POST["password"]))
        {
            apologize("You must provide your password.");
        }
        $positions = [];
        foreach ($rows as $row)
        {
            $stock = lookup($row["symbol"]);
            if ($stock !== false)
            {
                $positions[] = [
                    "name" => $stock["name"],
                    "price" => $stock["price"],
                    "shares" => $row["shares"],
                    "symbol"=> $row["symbol"]
                    ];
            }
         }
          render("portfolio.php", ['positions' => $positions, "title" => "portfolio"]);

    }
        else
        {
        // render portfolio
        render("portfolio.php", [ "title" => "portfolio"]);
        }

?>