BIM/auth.php

<?php

session_start();

if ($_SERVER['REQUEST_METHOD'] != 'POST') {
    header('Location: signin.php');
    exit();
}

if (!isset($_POST['login'], $_POST['password'])) {
    header('Location: signin.php');
    exit();
}

$login = htmlspecialchars($_POST['login']);
$passwd = htmlspecialchars($_POST['password']);