CodeIgniter 4.5の処理の流れ

CodeIgniter 4.5の処理の流れをまとめました。

CodeIgniter 4.5 Process Flow

public/index.php

check PHP version

define constant FCPATH

set current directory

instantiate Config\Paths

Config\Paths
- $systemDirectory
- $appDirectory
- $writableDirectory
- $testsDirectory
- $viewDirectory

load system/Boot.php

Boot
- define path constants
  - APPPATH
  - ROOTPATH
  - SYSTEMPATH
  - WRITEPATH
  - TESTPATH
- load constants
  - load Config/Constants.php
- check missing required PHP extensions
- load dot env
  - instantiate DotEnv
    - load .env file
- define Environment
- load Environment bootstrap
- load common functions
  - load Common.php
- load Autoloader
  - Services::autoloader()
    - instantiate Autoloader
    - initialize()
      - load Composer autoloader
    - register()
  - load Services
- set Exception handler
  - Services::exceptions()
    - instantiate FileLocator
    - initialize()
      - set Exception/Error handler
- initialize Kint
- autoload helpers
  - load URL helper
- initialize CodeIgniter
  - Services::codeigniter()
    - instantiate Config\App
    - instantiate CodeIgniter
  - initialize()
    - set default locale (Locale::setDefault())
    - set default timezone
  - setContext()
- run CodeIgniter
  - run()
    - getRequestObject()
      - Services::createRequest()
        
        Services::incomingrequest()
        
        Services::uri()
        
        Services::siteurifactory()
        
        instantiate SiteURIFactory
        
        SiteURIFactory::createFromGlobals()
        
        detectRoutePath()
        
        update superglobals
        
        update $_SERVER
        
        update $_GET
        
        instantiate SiteURI
        
        instantiate UserAgent
        
        instantiate Request
        
        IncomingRequest::__construct()
        
        detectLocale()
        
        if $negotiateLocale is true
        
        get lang from content negotiation
        
        setLocale()
        
        set locale in Request
        
        set default locale (Locale::setDefault())
      - spoof request method
    - getResponseObject()
      - instantiate Response
    - Event pre_system
    - instantiate Filters
    - run Required before Filters
      - force secure access
      - check Page Cache
    - handleRequest()
      - tryToRouteIt()
        
        instantiate Routes
        
        instantiate Router
        
        get Controller and method name
        
        get locale from route
        
        if route contains locale
        
        Request::setLocale()
        
        set locale in Request
        
        set default locale (Locale::setDefault())
        
        get Route Filters Info
      - enable Controller Filters
      - run before Filters
      - run Controller
        
        run Closure controller
        
        or
        
        instantiate Controller
        
        Event post_controller_constructor
        
        run Controller method
      - gather output
      - run after Filters
      - return Response object
    - run Required after Filters
    - Event post_system
    - sendResponse()