<?php

// error #1 below
if (isset($_POST['submit'])) {
	echo "HTML FORM";
} else {

// error #2, #3 below
$username = $_POST['"username"];
$password = $_POST["password"];
$code = $_GET['code'];

// errors below. (3)
$status = $mssg[0] .. " " . $mssg[1] . " " . $mssg[2]
echo $status . "<br />";
echo $mssg[$rand];

}