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 |
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13 | class WelcomeController extends Controller |
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14 | { |
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15 | /** |
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16 | * Create a new controller instance. |
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17 | */ |
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18 | public function __construct() |
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22 | |||
23 | /** |
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24 | * Show the application dashboard. |
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25 | * |
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26 | * @return \Illuminate\Http\Response |
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27 | */ |
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28 | public function index() |
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34 | |||
35 | /** |
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36 | * Show the customer registration form. |
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37 | * |
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38 | * @return \Illuminate\Http\Response |
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39 | */ |
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40 | View Code Duplication | public function signup() |
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48 | |||
49 | } |
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Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArray
is initialized the first time when the foreach loop is entered. You can also see that the value of thebar
key is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.