refactor: system/bootstrap.php only loads files and registers autoloader

public/index.php

@@ -3,6 +3,9 @@
 // Path to the front controller (this file)
 define('FCPATH', __DIR__ . DIRECTORY_SEPARATOR);
 
+// Ensure the current directory is pointing to the front controller's directory
+chdir(FCPATH);
+
 /*
  *---------------------------------------------------------------
  * BOOTSTRAP THE APPLICATION
@@ -12,21 +15,32 @@
  * and fires up an environment-specific bootstrapping.
  */
 
-// Ensure the current directory is pointing to the front controller's directory
-chdir(__DIR__);
-
 // Load our paths config file
 // This is the line that might need to be changed, depending on your folder structure.
-$pathsConfig = FCPATH . '../app/Config/Paths.php';
-// ^^^ Change this if you move your application folder
-require realpath($pathsConfig) ?: $pathsConfig;
+require FCPATH . '../app/Config/Paths.php';
+// ^^^ Change this line if you move your application folder
 
 $paths = new Config\Paths();
 
 // Location of the framework bootstrap file.
-$bootstrap = rtrim($paths->systemDirectory, '\\/ ') . DIRECTORY_SEPARATOR . 'bootstrap.php';
-/** @var CodeIgniter\CodeIgniter $app */
-$app     = require realpath($bootstrap) ?: $bootstrap;
+require rtrim($paths->systemDirectory, '\\/ ') . DIRECTORY_SEPARATOR . 'bootstrap.php';
+
+// Load environment settings from .env files into $_SERVER and $_ENV
+require_once SYSTEMPATH . 'Config/DotEnv.php';
+(new CodeIgniter\Config\DotEnv(ROOTPATH))->load();
+
+/*
+ * ---------------------------------------------------------------
+ * GRAB OUR CODEIGNITER INSTANCE
+ * ---------------------------------------------------------------
+ *
+ * The CodeIgniter class contains the core functionality to make
+ * the application run, and does all of the dirty work to get
+ * the pieces all working together.
+ */
+
+$app = Config\Services::codeigniter();
+$app->initialize();
 $context = is_cli() ? 'php-cli' : 'web';
 $app->setContext($context);
 
@@ -37,4 +51,5 @@
  * Now that everything is setup, it's time to actually fire
  * up the engines and make this app do its thang.
  */
+
 $app->run();

spark

@@ -21,13 +21,28 @@
  * this class mainly acts as a passthru to the framework itself.
  */
 
+// Refuse to run when called from php-cgi
+if (strpos(PHP_SAPI, 'cgi') === 0) {
+    exit("The cli tool is not supported when running php-cgi. It needs php-cli to function!\n\n");
+}
+
+// We want errors to be shown when using it from the CLI.
+error_reporting(-1);
+ini_set('display_errors', '1');
+
 /**
  * @var bool
  *
  * @deprecated No longer in use. `CodeIgniter` has `$context` property.
  */
 define('SPARKED', true);
 
+// Path to the front controller
+define('FCPATH', __DIR__ . DIRECTORY_SEPARATOR . 'public' . DIRECTORY_SEPARATOR);
+
+// Ensure the current directory is pointing to the front controller's directory
+chdir(FCPATH);
+
 /*
  *---------------------------------------------------------------
  * BOOTSTRAP THE APPLICATION
@@ -37,36 +52,28 @@ define('SPARKED', true);
  * and fires up an environment-specific bootstrapping.
  */
 
-// Refuse to run when called from php-cgi
-if (strpos(PHP_SAPI, 'cgi') === 0) {
-    exit("The cli tool is not supported when running php-cgi. It needs php-cli to function!\n\n");
-}
-
-// Path to the front controller
-define('FCPATH', __DIR__ . DIRECTORY_SEPARATOR . 'public' . DIRECTORY_SEPARATOR);
-
 // Load our paths config file
-$pathsConfig = 'app/Config/Paths.php';
+// This is the line that might need to be changed, depending on your folder structure.
+require FCPATH . '../app/Config/Paths.php';
 // ^^^ Change this line if you move your application folder
-require realpath($pathsConfig) ?: $pathsConfig;
 
 $paths = new Config\Paths();
 
-// Ensure the current directory is pointing to the front controller's directory
-chdir(FCPATH);
+// Location of the framework bootstrap file.
+require rtrim($paths->systemDirectory, '\\/ ') . DIRECTORY_SEPARATOR . 'bootstrap.php';
 
-$bootstrap = rtrim($paths->systemDirectory, '\\/ ') . DIRECTORY_SEPARATOR . 'bootstrap.php';
-/** @var CodeIgniter\CodeIgniter $app */
-$app = require realpath($bootstrap) ?: $bootstrap;
+// Load environment settings from .env files into $_SERVER and $_ENV
+require_once SYSTEMPATH . 'Config/DotEnv.php';
+(new CodeIgniter\Config\DotEnv(ROOTPATH))->load();
+
+// Grab our CodeIgniter
+$app = Config\Services::codeigniter();
+$app->initialize();
 $app->setContext('spark');
 
 // Grab our Console
 $console = new CodeIgniter\CLI\Console($app);
 
-// We want errors to be shown when using it from the CLI.
-error_reporting(-1);
-ini_set('display_errors', '1');
-
 // Show basic information before we do anything else.
 if (is_int($suppress = array_search('--no-header', $_SERVER['argv'], true))) {
     unset($_SERVER['argv'][$suppress]); // @codeCoverageIgnore

system/bootstrap.php

@@ -9,7 +9,6 @@
  * the LICENSE file that was distributed with this source code.
  */
 
-use CodeIgniter\Config\DotEnv;
 use Config\Autoload;
 use Config\Modules;
 use Config\Paths;
@@ -67,6 +66,7 @@
  * GRAB OUR CONSTANTS & COMMON
  * ---------------------------------------------------------------
  */
+
 if (! defined('APP_NAMESPACE')) {
     require_once APPPATH . 'Config/Constants.php';
 }
@@ -123,26 +123,5 @@ class_alias('Config\Services', 'CodeIgniter\Services');
     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;

user_guide_src/source/changelogs/v4.2.0.rst

@@ -16,6 +16,7 @@ BREAKING
 - The ``CodeIgniter\CodeIgniter`` class has a new property ``$context`` and it must have the correct context at runtime. So the following files have been changed:
     - ``public/index.php``
     - ``spark``
+- The ``system/bootstrap.php`` file has been modified to easily implement `Preloading <https://www.php.net/manual/en/opcache.preloading.php>`_. Returning a ``CodeIgniter`` instance and loading ``.env`` file have been moved to ``index.php`` and ``spark``.
 - The method signature of ``CodeIgniter\CLI\CommandRunner::_remap()`` has been changed to fix a bug.
 - The ``CodeIgniter\Autoloader\Autoloader::initialize()`` has changed the behavior to fix a bug. It used to use Composer classmap only when ``$modules->discoverInComposer`` is true. Now it always uses the Composer classmap if Composer is available.
 - The color code output by :ref:`CLI::color() <cli-library-color>` has been changed to fix a bug.

user_guide_src/source/installation/upgrade_420.rst

@@ -24,7 +24,7 @@ The following files received significant changes and
 Breaking Changes
 ****************
 
-
+- The ``system/bootstrap.php`` file no longer returns a ``CodeIgniter`` instance, and does not load the ``.env`` file (now handled in ``index.php`` and ``spark``). If you have code that expects these behaviors it will no longer work and must be modified. This has been changed to make `Preloading <https://www.php.net/manual/en/opcache.preloading.php>`_ easier to implement.
 
 Breaking Enhancements
 *********************