The document compares the directory structures and MVC implementation between CodeIgniter 3 and CodeIgniter 4. Some key differences include CodeIgniter 4 using namespaces for classes, updating the directory structure of application and system folders, and implementing an ORM for models to work with databases rather than using the query builder as in CodeIgniter 3. The index.php file is also updated to bootstrap the framework differently in CodeIgniter 4.

1. CodeIgniter4
CodeIgniter4
CodeIgniter3
Tetsuro Yoshikawa
@iBotchME
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2. !
CodeIgniter4 CodeIgniter3
CodeIgniter4
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3. 3 / 57

4. [ ] CodeIgniter 3 4
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5. [ ] CodeIgniter 3 4
CodeIgniter3 CodeIgniter4
CI_Controller Config/Services
PHP5.2 (PHP5.4 )
CI3.1.x 5.3 5.5
PHP7
namespace namespace Class
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6. [ ]
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7. [ ]
CodeIgniter3 CodeIgniter4
_
)
getX null
isX boolean
etc...
|| && ! || && !
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8. Directory
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9. CI3
└──
application
├──
cache
├──
config
├──
controllers
├──
core
├──
helpers
├──
hooks
├──
index.html
├──
language
├──
libraries
├──
logs
├──
migrations
├──
models
├──
third_party
└──
views
[ ] application Directory
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10. CI3
└──
application
├──
cache
├──
config
├──
controllers
├──
core
├──
helpers
├──
hooks
├──
index.html
├──
language
├──
libraries
├──
logs
├──
migrations
├──
models
├──
third_party
└──
views
CI4
└──
application
├──
Config
├──
Controllers
├──
Database
├──
Filters
├──
Helpers
├──
Language
├──
Libraries
├──
Models
└──
Views
[ ] application Directory
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11. CI3
└──
system
├──
core
├──
database
├──
fonts
├──
helpers
├──
language
└──
libraries
[ ] system Directory
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12. CI3
└──
system
├──
core
├──
database
├──
fonts
├──
helpers
├──
language
└──
libraries
CI4
├──
system
├──
Autoloader
├──
CLI
├──
Cache
├──
Commands
├──
Config
├──
Database
├──
Debug
├──
Filters
├──
HTTP
├──
Helpers
├──
Hooks
├──
Language
├──
Log
├──
Pager
├──
Router
├──
Security
├──
Session
├──
Test
├──
ThirdParty
└──
View
[ ] system Directory
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13. [ ] CodeIgniter4 Directory
CI4
├──
public
│
├──
favicon.ico
│
├──
index.php
│
└──
robots.txt
└──
writable
├──
cache
├──
logs
└──
uploads
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14. Directory
Directory
writable
index.php
system core
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15. [ ] CodeIgniter.php
index.php
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16. [ ] index.php
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17. [ ] index.php
CodeIgniter3 CodeIgniter4
1. APPPATH FCPATH 1. APPPATH FCPATH
2.
3.
4. Exception
2. CodeIgniter.php (require) 5. CodeIgniter class run
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18. [ ] CodeIgniter.php
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19. [ ] CodeIgniter.php
CodeIgniter3 CodeIgniter4
1. PHP
2. core 1. Request Response Cache
3. Router Controller method 2. Request class method
3. TryCatch
Exception 404
4. before Filter
4. Controller Routing 5. Controller Routing
6. after Filter
5. Output 7. Response
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20. [ ] CodeIgniter.php index.php
AutoLoader
CodeIgniter.php
Controller
Exception 404
Filter
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21. [ ] MVC
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22. [ ] Controller
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23. [ ] Controller::CodeIgniter3
<?php
class
Home
extends
CI_Controller
{
public
function
__construct()
{
//
CI_Controller $this core/* 突 込
parent::__construct();
//
神 入 Loader
$this-­‐>load-­‐>model('hogehoge');
}
public
function
index()
{
$data
=
$this-­‐>hogehoge-­‐>get_view_data();
$this-­‐>load-­‐>view('hogehoge',
$data);
}
}
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24. [ ] Controller::CodeIgniter4
<?php
namespace
AppControllers;
class
Home
extends
CodeIgniterController
{
public
function
index()
{
//
new
$hogehoge_model
=
new
AppModelsHogehogeModel();
//
使 使 別 ORM 実装
$data
=
$hogehoge_model-­‐>findWhere('is_active',
1);
return
view('Hogehoge',
$data);
}
}
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25. [ ] Controller::CodeIgniter4
constructor injection
request RequestInterface
response ResponseInterface
logger LogLogger
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26. [ ] Model
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27. [ ] Model::CodeIgniter3
<?php
class
Hogehoge
extends
CI_Model
{
public
function
__construct()
{
//
magic
method $this-­‐>db
//
CI 変数内 入 取
$this-­‐>load-­‐>model('hoge');
}
public
function
get_view_data()
{
//
QueryBuilder DB
$this-­‐>db-­‐>where('is_active',
1);
$query
=
$this-­‐>db-­‐>get('hogehoge',
3);
return
$query-­‐>result();
}
}
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28. [ ] Model::CodeIgniter4
<?php
namespace
AppModel;
class
HogehogeModel
extends
CodeIgniterModel
{
//
ORM対応
protected
$table
=
'hogehoge';
protected
$allowedFields
=
['fuga',
'is_active'];
}
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29. ORM
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30. Model::CodeIgniter 4 ORM
<?php
namespace
AppModel;
class
HogehogeModel
extends
CodeIgniterModel
{
public
function
get_view_data()
{
//
CodeIgniter3 QueryBuilder 書 事
$query
=
$this-­‐>db-­‐>table('hogehoge')
-­‐>where('is_active',
1)
-­‐>get(3);
return
$query-­‐>getResult();
}
}
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31. View
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32. [ ] View::CodeIgniter3
<!DOCTYPE
html>
<html>
<head>
<title>Hogehgoe</title>
</head>
<body>
<!-­‐-­‐
CI_Controller 変数 参照渡
-­‐-­‐>
<!-­‐-­‐
$this-­‐>db 呼 出
-­‐-­‐>
<?php
echo
$this-­‐>pagination-­‐>create_links();?>
</body>
</html>
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33. [ ] View::CodeIgniter4
<!DOCTYPE
html>
<html>
<head>
<title>Hogehgoe</title>
</head>
<body>
<!-­‐-­‐
Controller pager 渡
-­‐-­‐>
<?=
$pager-­‐>links();?>
</body>
</html>
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34. [ ]
$this new
ORM
ORM CI3 QueryBuilder
namespace
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35. 35 / 57

36. CodeIgniter4
Todo
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37. [ ] Controller::Todo
<?php
namespace
AppControllers;
use
AppModels
as
Model;
class
Todo
extends
CodeIgniterController
{
//
設定
protected
$helpers
=
['url'];
public
function
index()
{
//
風 書
//
helper('url');
//
session引数 空 Session 取
session()-­‐>start();
$todo_use_orm_model
=
new
ModelTodoUseORMModel();
//
Model CodeIgniter3 pagination相当 引 付
$data
=
[
'todo_data'
=>
$todo_use_orm_model-­‐>paginate(10),
'pager'
=>
$todo_use_orm_model-­‐>pager
];
return
view('todo',
$data);
}
...
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38. [ ] Controller::Todo On/Off
...
public
function
dead_or_live(string
$id
=
null)
{
if
($this-­‐>request-­‐>getMethod()
!==
'post')
{
//
404NotFound用Exception
throw
new
CodeIgniterPageNotFoundException();
}
$todo_use_orm_model
=
new
ModelTodoUseORMModel();
$active
=
(bool)$this-­‐>request-­‐>getPost('deleted');
//
ORM!!!ORM!!!
$todo_use_orm_model-­‐>update($id,
['deleted'
=>
$active]);
//
RedirectHeader 設定 Exception 発行
$this-­‐>response-­‐>redirect('http://192.168.33.40/todo/index');
}
...
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39. [ ] Controller::Todo /
...
public
function
save()
{
if
($this-­‐>request-­‐>getMethod()
!==
'post')
{
throw
new
CodeIgniterPageNotFoundException();
}
$todo_use_orm_model
=
new
ModelTodoUseORMModel();
//
$todo_model
=
new
ModelTodoModel($todo_use_orm_model);
$save_data
=
$this-­‐>request-­‐>getPost(['todo',
'id']);
$todo_model-­‐>doSave($save_data);
$this-­‐>response-­‐>redirect('http://192.168.33.40/todo/index');
}
...
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40. [ ] TodoUseORMModel::ORM
<?php
namespace
AppModels;
//
CI_Model
=>
CodeIgniterModel
class
TodoUseORMModel
extends
CodeIgniterModel
{
//
table名
protected
$table
=
'todo';
//
編集可能 名
protected
$allowedFields
=
['deleted',
'todo'];
...
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41. [ ] Model ORM
primaryKey string id PrimaryKey
returnType string array (array|object)
useSoftDeletes boolean false
Delete
true deleted )
useTimestamps boolean false
dateFormat string datetime
createField string created_at
updatedField string updated_at
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42. [ ] TodoUseORMModel::
//
UseORM ORM find 使 実装
public
function
exists($id)
{
//
$this-­‐>db-­‐>table builderObject取得
$builder
=
$this-­‐>db-­‐>table($this-­‐>table);
$builder-­‐>where('id',
$id);
$query
=
$builder-­‐>get(1);
return
(
isset($query)
&&
!
empty($query-­‐>getRow())
);
}
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43. [ ] TodoModel::
<?php
namespace
AppModels;
use
AppLibrariesValidation;
class
TodoModel
{
private
$validator;
private
$session;
private
$dao;
//
Autoloader CodeIgniterModel 継承
//
化
public
function
__construct(TodoUseORMModel
$use_orm)
{
$this-­‐>use_orm
=
$use_orm;
$this-­‐>session
=
session();
//
資料作成時 実装 Validation 自作
$this-­‐>validator
=
ValidationFactory::make([],
[
['id'
=>
['is_natural',
'min[1]',
[$use_orm,
'exists']]],
['todo'
=>
'required|lenmax[100]']
],
['todo'
=>
'項目']);
}
...
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44. [ ] TodoModel::
public
function
doSave($input)
{
$this-­‐>validator-­‐>resetValue($input);
$this-­‐>session-­‐>start();
if
(
!
$this-­‐>validator-­‐>run()
)
{
$error_msg
=
$this-­‐>validator-­‐>getErrorMessage();
$this-­‐>session-­‐>setFlashdata('error_msg',
$error_msg);
return
false;
}
if
(
empty($input['id']))
unset($input['id']);
//
ORM allowedFields 空 場合 protect 解除
//
$this-­‐>use_orm-­‐>protect(false);
if
(
!
$this-­‐>use_orm-­‐>save($input)
)
{
$this-­‐>session-­‐>setFlashdata('error_msg',
'Todo 更新 失敗 ');
return
false;
}
$this-­‐>session-­‐>setFlashdata('success_msg',
'Todo 更新 成功 ');
return
true;
}
...
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45. [ ] View::Session
<?php
//
第一引数 string 入 良 session 楽?>
<?php
if
(session('success_msg')):?>
<div
class="success_msg">
<?=
session('success_msg');?>
</div>
<?php
endif;?>
<?php
if
(session('error_msg')):?>
<div
class="error_msg">
<?=
session('error_msg');?>
</div>
<?php
endif;?>
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46. [ ] View::ServiceLocater
<form
action="http://192.168.33.40/todo/save"
method="POST">
<input
type="hidden"
name="id"
value="">
<input
type="text"
name="todo"
value="">
<?php
//
ServiceLocater security 取得 ?>
<input
type="hidden"
name="<?=
service('security')-­‐>getCSRFTokenName();?>"
value="<?=
service('security')-­‐>getCSRFHash();?>">
<input
type="submit"
value="Todo!!">
</form>
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47. [ ] Controller Filter
...
//
Filter
public
$aliases
=
[
'csrf'
=>
AppFiltersCSRF::class,
'toolbar'
=>
AppFiltersDebugToolbar::class,
];
public
$globals
=
[
//
csrf 書 alias csrf 動作
'before'
=>
['csrf'],
'after'
=>
['toolbar']
];
...
Controller CSRF Filter
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48. [ ] Controller Filter
//
分 事
public
$methods
=
[
'post'
=>
['csrf']
];
//特定 以下 設定 事 可能
public
$filters
=
[
'csrf'
=>
['before'
=>
['todo/*']]
];
...
Filter
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49. [ ] ::Model
<?php
namespace
AppModels;
class
TodoUseORMModelTest
extends
CIDatabaseTestCase
{
protected
$refresh
=
true;
protected
$seed
=
'TestTodoUseORMSeeder';
public
function
setUp()
{
parent::setUp();
//
CodeIgniterModel 第一引数 DB
//
第二引数 BaseConfig 入 構造
//
DatabaseTestCase DB 突 込
$this-­‐>todo_use_orm_model
=
new
TodoUseORMModel($this-­‐>db);
}
public
function
testTodo 入 ()
{
$this-­‐>assertTrue($this-­‐>todo_use_orm_model-­‐>exists('1'));
}
...
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50. [ ] ::Library
<?php
namespace
AppLibrariesValidation;
class
RulesRunnerTest
extends
CIUnitTestCase{
/**
*
@dataProvider
runnerProvider
**/
public
function
test 正 実行 (
$class_method,
$value,
$expected)
{
//
AutoLoader 自作Libarary new
$rules_runner
=
new
RulesRunner();
$run_result
=
$rules_runner-­‐>run($class_method,
$value);
$this-­‐>assertEquals($expected,
$run_result);
}
...
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51. [ ]
AutoLoader
Test
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52. [ ]
AutoLoader
Test
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53. [ ]
AutoLoader
Test
ValidationLibrary
( )
site_url
CodeIngniter
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54. 54 / 57

55. CodeIgniter4 CodeIgniter3
CodeIgniter4
CI PR
55 / 57

56. CodeIgniter4 PR
github GPG
$
git
commit
-­‐s
https://bcit-ci.github.io/CodeIgniter4/contributing/signing.html
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57. Comming soon 2017/04
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