Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
1 | <?php |
||
16 | class AdminController extends Controller |
||
17 | { |
||
18 | /** |
||
19 | * @inheritdoc |
||
20 | */ |
||
21 | View Code Duplication | public function behaviors() |
|
41 | |||
42 | /** |
||
43 | * Lists all Admin models. |
||
44 | * @return mixed |
||
45 | */ |
||
46 | public function actionIndex() |
||
47 | { |
||
48 | $dataProvider = new ActiveDataProvider([ |
||
49 | 'query' => Admin::find(), |
||
50 | ]); |
||
51 | |||
52 | return $this->render('index', [ |
||
53 | 'dataProvider' => $dataProvider, |
||
54 | ]); |
||
55 | } |
||
56 | |||
57 | /** |
||
58 | * Displays a single Admin model. |
||
59 | * @param integer $id |
||
60 | * @return mixed |
||
61 | */ |
||
62 | public function actionView($id) |
||
63 | { |
||
64 | return $this->render('view', [ |
||
65 | 'model' => $this->findModel($id), |
||
66 | ]); |
||
67 | } |
||
68 | |||
69 | /** |
||
70 | * Creates a new Admin model. |
||
71 | * If creation is successful, the browser will be redirected to the 'view' page. |
||
72 | * @return mixed |
||
73 | */ |
||
74 | View Code Duplication | public function actionCreate() |
|
86 | |||
87 | /** |
||
88 | * Updates an existing Admin model. |
||
89 | * If update is successful, the browser will be redirected to the 'view' page. |
||
90 | * @param integer $id |
||
91 | * @return mixed |
||
92 | */ |
||
93 | View Code Duplication | public function actionUpdate($id) |
|
105 | |||
106 | /** |
||
107 | * Deletes an existing Admin model. |
||
108 | * If deletion is successful, the browser will be redirected to the 'index' page. |
||
109 | * @param integer $id |
||
110 | * @return mixed |
||
111 | */ |
||
112 | public function actionDelete($id) |
||
113 | { |
||
114 | $this->findModel($id)->delete(); |
||
115 | |||
116 | return $this->redirect(['index']); |
||
117 | } |
||
118 | |||
119 | /** |
||
120 | * Finds the Admin model based on its primary key value. |
||
121 | * If the model is not found, a 404 HTTP exception will be thrown. |
||
122 | * @param integer $id |
||
123 | * @return Admin the loaded model |
||
124 | * @throws NotFoundHttpException if the model cannot be found |
||
125 | */ |
||
126 | View Code Duplication | protected function findModel($id) |
|
134 | } |
||
135 |
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.