Initial

system/bootstrap.php

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+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+use CodeIgniter\Config\DotEnv;
+use Config\Autoload;
+use Config\Modules;
+use Config\Paths;
+use Config\Services;
+
+/*
+ * ---------------------------------------------------------------
+ * SETUP OUR PATH CONSTANTS
+ * ---------------------------------------------------------------
+ *
+ * The path constants provide convenient access to the folders
+ * throughout the application. We have to setup them up here
+ * so they are available in the config files that are loaded.
+ */
+
+// The path to the application directory.
+if (! defined('APPPATH')) {
+    /**
+     * @var Paths $paths
+     */
+    define('APPPATH', realpath(rtrim($paths->appDirectory, '\\/ ')) . DIRECTORY_SEPARATOR);
+}
+
+// The path to the project root directory. Just above APPPATH.
+if (! defined('ROOTPATH')) {
+    define('ROOTPATH', realpath(APPPATH . '../') . DIRECTORY_SEPARATOR);
+}
+
+// The path to the system directory.
+if (! defined('SYSTEMPATH')) {
+    /**
+     * @var Paths $paths
+     */
+    define('SYSTEMPATH', realpath(rtrim($paths->systemDirectory, '\\/ ')) . DIRECTORY_SEPARATOR);
+}
+
+// The path to the writable directory.
+if (! defined('WRITEPATH')) {
+    /**
+     * @var Paths $paths
+     */
+    define('WRITEPATH', realpath(rtrim($paths->writableDirectory, '\\/ ')) . DIRECTORY_SEPARATOR);
+}
+
+// The path to the tests directory
+if (! defined('TESTPATH')) {
+    /**
+     * @var Paths $paths
+     */
+    define('TESTPATH', realpath(rtrim($paths->testsDirectory, '\\/ ')) . DIRECTORY_SEPARATOR);
+}
+
+/*
+ * ---------------------------------------------------------------
+ * GRAB OUR CONSTANTS & COMMON
+ * ---------------------------------------------------------------
+ */
+if (! defined('APP_NAMESPACE')) {
+    require_once APPPATH . 'Config/Constants.php';
+}
+
+// Require app/Common.php file if exists.
+if (is_file(APPPATH . 'Common.php')) {
+    require_once APPPATH . 'Common.php';
+}
+
+// Require system/Common.php
+require_once SYSTEMPATH . 'Common.php';
+
+/*
+ * ---------------------------------------------------------------
+ * LOAD OUR AUTOLOADER
+ * ---------------------------------------------------------------
+ *
+ * The autoloader allows all of the pieces to work together in the
+ * framework. We have to load it here, though, so that the config
+ * files can use the path constants.
+ */
+
+if (! class_exists('Config\Autoload', false)) {
+    require_once SYSTEMPATH . 'Config/AutoloadConfig.php';
+    require_once APPPATH . 'Config/Autoload.php';
+    require_once SYSTEMPATH . 'Modules/Modules.php';
+    require_once APPPATH . 'Config/Modules.php';
+}
+
+require_once SYSTEMPATH . 'Autoloader/Autoloader.php';
+require_once SYSTEMPATH . 'Config/BaseService.php';
+require_once SYSTEMPATH . 'Config/Services.php';
+require_once APPPATH . 'Config/Services.php';
+
+// Use Config\Services as CodeIgniter\Services
+if (! class_exists('CodeIgniter\Services', false)) {
+    class_alias('Config\Services', 'CodeIgniter\Services');
+}
+
+// Initialize and register the loader with the SPL autoloader stack.
+Services::autoloader()->initialize(new Autoload(), new Modules())->register();
+
+// Now load Composer's if it's available
+if (is_file(COMPOSER_PATH)) {
+    /*
+     * The path to the vendor directory.
+     *
+     * We do not want to enforce this, so set the constant if Composer was used.
+     */
+    if (! defined('VENDORPATH')) {
+        define('VENDORPATH', dirname(COMPOSER_PATH) . DIRECTORY_SEPARATOR);
+    }
+
+    require_once COMPOSER_PATH;
+}
+
+// Load environment settings from .env files into $_SERVER and $_ENV
+require_once SYSTEMPATH . 'Config/DotEnv.php';
+
+$env = new DotEnv(ROOTPATH);
+$env->load();
+
+// Always load the URL helper, it should be used in most of apps.
+helper('url');
+
+/*
+ * ---------------------------------------------------------------
+ * GRAB OUR CODEIGNITER INSTANCE
+ * ---------------------------------------------------------------
+ *
+ * The CodeIgniter class contains the core functionality to make
+ * the application run, and does all of the dirty work to get
+ * the pieces all working together.
+ */
+
+$app = Services::codeigniter();
+$app->initialize();
+
+return $app;