Prolog.php

<?php
include_once '../app/config/config.php';
include_once '../app/general/Security.php';
require("../app/securimage/Securimage.php");

$mysqli = new mysqli(HOST, USER, PASSWORD, DATABASE);
if (mysqli_connect_errno()) {
    printf("Error Connection\n", mysqli_connect_error());
    exit;
}


sec_session_start(); // Our custom secure way of starting a PHP session.

if (isset($_POST['email'], $_POST['p'])) {
    $email = $_POST['email'];
    $password = $_POST['p']; // The hashed password.
    $captcha = $_POST['captcha_code'];

    $img = new Securimage();

    if (login($email, $password, $mysqli) == true && $img->check($captcha) == true) {
        // Login success
        header('Location: ../admin/logged.php');
    } else {
        // Login failed
        header('Location: index.php?error=1');
    }
} else {
    // The correct POST variables were not sent to this page.
    echo 'Invalid Request';
}