index.php

<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2019, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package    CodeIgniter
 * @author    EllisLab Dev Team
 * @copyright    Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright    Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
 * @license    https://opensource.org/licenses/MIT	MIT License
 * @link    https://codeigniter.com
 * @since    Version 1.0.0
 * @filesource
 */

$envs = ['development', 'testing', 'production'];
define('ENVIRONMENT', isset($_SERVER['CI_ENV']) ? $_SERVER['CI_ENV'] : $envs[0]);

switch (ENVIRONMENT) {
    case 'development':
        error_reporting(-1);
        ini_set('display_errors', 1);
        break;
    case 'testing':
    case 'production':
        ini_set('display_errors', 0);
        if (version_compare(PHP_VERSION, '5.3', '>=')) {
            error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED & ~E_STRICT & ~E_USER_NOTICE & ~E_USER_DEPRECATED);
        } else {
            error_reporting(E_ALL & ~E_NOTICE & ~E_STRICT & ~E_USER_NOTICE);
        }
        break;
    default:
        header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
        echo 'The application environment is not set correctly.';
        exit(1); // EXIT_ERROR
}
$system_path = 'system';
$application_folder = 'application';
$view_folder = '';

if (defined('STDIN')) {
    chdir(dirname(__FILE__));
}

if (($_temp = realpath($system_path)) !== FALSE) {
    $system_path = $_temp . DIRECTORY_SEPARATOR;
} else {
    // Ensure there's a trailing slash
    $system_path = strtr(
            rtrim($system_path, '/\\'),
            '/\\',
            DIRECTORY_SEPARATOR . DIRECTORY_SEPARATOR
        ) . DIRECTORY_SEPARATOR;
}

// Is the system path correct?
if (!is_dir($system_path)) {
    header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
    echo 'Your system folder path does not appear to be set correctly. Please open the following file and correct this: ' . pathinfo(__FILE__, PATHINFO_BASENAME);
    exit(3); // EXIT_CONFIG
}

// The name of THIS file
define('SELF', pathinfo(__FILE__, PATHINFO_BASENAME));

// Path to the system directory
define('BASEPATH', $system_path);

// Path to the front controller (this file) directory
define('FCPATH', dirname(__FILE__) . DIRECTORY_SEPARATOR);

// Name of the "system" directory
define('SYSDIR', basename(BASEPATH));

// The path to the "application" directory
if (is_dir($application_folder)) {
    if (($_temp = realpath($application_folder)) !== FALSE) {
        $application_folder = $_temp;
    } else {
        $application_folder = strtr(
            rtrim($application_folder, '/\\'),
            '/\\',
            DIRECTORY_SEPARATOR . DIRECTORY_SEPARATOR
        );
    }
} elseif (is_dir(BASEPATH . $application_folder . DIRECTORY_SEPARATOR)) {
    $application_folder = BASEPATH . strtr(
            trim($application_folder, '/\\'),
            '/\\',
            DIRECTORY_SEPARATOR . DIRECTORY_SEPARATOR
        );
} else {
    header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
    echo 'Your application folder path does not appear to be set correctly. Please open the following file and correct this: ' . SELF;
    exit(3); // EXIT_CONFIG
}

define('APPPATH', $application_folder . DIRECTORY_SEPARATOR);

// The path to the "views" directory
if (!isset($view_folder[0]) && is_dir(APPPATH . 'views' . DIRECTORY_SEPARATOR)) {
    $view_folder = APPPATH . 'views';
} elseif (is_dir($view_folder)) {
    if (($_temp = realpath($view_folder)) !== FALSE) {
        $view_folder = $_temp;
    } else {
        $view_folder = strtr(
            rtrim($view_folder, '/\\'),
            '/\\',
            DIRECTORY_SEPARATOR . DIRECTORY_SEPARATOR
        );
    }
} elseif (is_dir(APPPATH . $view_folder . DIRECTORY_SEPARATOR)) {
    $view_folder = APPPATH . strtr(
            trim($view_folder, '/\\'),
            '/\\',
            DIRECTORY_SEPARATOR . DIRECTORY_SEPARATOR
        );
} else {
    header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
    echo 'Your view folder path does not appear to be set correctly. Please open the following file and correct this: ' . SELF;
    exit(3); // EXIT_CONFIG
}

define('VIEWPATH', $view_folder . DIRECTORY_SEPARATOR);
//require_once BASEPATH . 'core/CodeIgniter.php';

include 'application/config/database.php';
$database = $db['default']['database'];
if ($database == '') {
    header("Location: installer");
} else {
    $data = $db['default'];
    $mysqli = @new mysqli($data['hostname'], $data['username'], $data['password'], '');
    $dbname = $data['database'];
    if (empty (mysqli_fetch_array(mysqli_query($mysqli,"SHOW DATABASES LIKE '$dbname'"))))
    {
        $mysqli->close();
        header("Location: installer");
    }
    else
    {
        $mysqli->close();
        require_once BASEPATH . 'core/CodeIgniter.php';
    }
}