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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| 11 | class SettingsController extends Controller |
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| 12 | { |
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| 13 | /** |
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| 14 | * SettingsController Constructor |
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| 15 | */ |
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| 16 | public function __construct() |
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| 21 | |||
| 22 | /** |
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| 23 | * Display a listing of the resource. |
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| 24 | * |
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| 25 | * @return \Illuminate\Http\Response |
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| 26 | */ |
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| 27 | public function basicView() |
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| 57 | |||
| 58 | /** |
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| 59 | * Update the basic settings. |
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| 60 | * |
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| 61 | * @param \Illuminate\Http\Request $request |
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| 62 | * @return \Illuminate\Http\Response |
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| 63 | */ |
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| 64 | public function generalUpdate(Request $request) |
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| 65 | { |
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| 66 | |||
| 67 | $config = new \Larapack\ConfigWriter\Repository('timecontrol'); |
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| 68 | $config->set('title', $request->get('title')); |
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| 69 | $config->set('email', $request->get('email')); |
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| 70 | $config->set('date', $request->get('date')); |
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| 71 | $config->set('time', $request->get('time')); |
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| 72 | $config->save(); |
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| 73 | |||
| 74 | View Code Duplication | if ($config) { |
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| 75 | sleep(3); |
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| 76 | session()->flash('message', 'Settings have been saved'); |
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| 77 | return redirect('settings/general'); |
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| 78 | } else { |
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| 79 | session()->flash('message', 'Settings have not been saved, please verify'); |
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| 80 | return redirect('settings/general'); |
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| 81 | } |
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| 82 | } |
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| 83 | |||
| 84 | /** |
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| 85 | * Display a form to configure the backup settings. |
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| 86 | * |
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| 87 | * @return \Illuminate\Http\Response |
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| 88 | */ |
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| 89 | public function backupView() |
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| 98 | } |
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| 99 |
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
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey 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.