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 TrainingTypeController extends Controller |
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| 14 | { |
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| 15 | /** |
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| 16 | * Display a listing of the resource. |
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| 17 | * |
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| 18 | * @return \Illuminate\Http\Response |
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| 19 | */ |
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| 20 | public function index() |
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| 26 | |||
| 27 | /** |
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| 28 | * Show the form for creating a new resource. |
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| 29 | * |
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| 30 | * @return \Illuminate\Http\Response |
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| 31 | */ |
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| 32 | public function create() |
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| 37 | |||
| 38 | /** |
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| 39 | * Store a newly created resource in storage. |
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| 40 | * |
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| 41 | * @param StoreTrainingTypeRequest $request |
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| 42 | * @return \Illuminate\Http\Response |
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| 43 | */ |
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| 44 | public function store(StoreTrainingTypeRequest $request) |
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| 50 | |||
| 51 | /** |
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| 52 | * Show the individual training type record. |
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| 53 | * |
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| 54 | * @param $trainingtypeId |
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| 55 | * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View |
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| 56 | */ |
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| 57 | public function show($trainingtypeId) |
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| 64 | |||
| 65 | /** |
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| 66 | * Show the form for editing the specified resource. |
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| 67 | * |
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| 68 | * @param int $id |
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| 69 | * @return \Illuminate\Http\Response |
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| 70 | */ |
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| 71 | public function edit(TrainingType $trainingtype) |
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| 76 | |||
| 77 | /** |
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| 78 | * Update the specified resource in storage. |
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| 79 | * |
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| 80 | * @param \Illuminate\Http\Request $request |
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| 81 | * @param int $id |
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| 82 | * @return \Illuminate\Http\Response |
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| 83 | */ |
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| 84 | View Code Duplication | public function update(StoreTrainingTypeRequest $request, TrainingType $trainingtype) |
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| 92 | |||
| 93 | /** |
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| 94 | * Remove the specified resource from storage. |
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| 95 | * |
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| 96 | * @param int $id |
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| 97 | * @return \Illuminate\Http\Response |
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| 98 | */ |
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| 99 | public function destroy($id) |
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| 106 | } |
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| 107 |
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.