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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| 12 | class DashboardWidgetController extends Controller  | 
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| 13 | { | 
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| 14 | |||
| 15 | use Helpers;  | 
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| 16 | |||
| 17 |     public function __construct() { | 
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| 20 | |||
| 21 | /**  | 
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| 22 | * Display a listing of all authorized devices  | 
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| 23 | *  | 
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| 24 | * @return \Illuminate\Http\Response  | 
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| 25 | */  | 
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| 26 | public function index(Request $request)  | 
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| 30 | |||
| 31 | /**  | 
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| 32 | * Show the form for creating a new resource.  | 
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| 33 | *  | 
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| 34 | * @return \Illuminate\Http\Response  | 
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| 35 | */  | 
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| 36 | public function create()  | 
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| 40 | |||
| 41 | /**  | 
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| 42 | * Store a newly created resource in storage.  | 
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| 43 | *  | 
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| 44 | * @param \Illuminate\Http\Request $request  | 
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| 45 | * @return \Illuminate\Http\Response  | 
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| 46 | */  | 
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| 47 | public function store(Request $request)  | 
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| 67 | |||
| 68 | /**  | 
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| 69 | * Display the specified resource.  | 
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| 70 | *  | 
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| 71 | * @param int $id  | 
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| 72 | * @return \Illuminate\Http\Response  | 
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| 73 | */  | 
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| 74 | public function show(Request $request, $id)  | 
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| 80 | |||
| 81 | /**  | 
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| 82 | * Show the form for editing the specified resource.  | 
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| 83 | *  | 
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| 84 | * @param int $id  | 
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| 85 | * @return \Illuminate\Http\Response  | 
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| 86 | */  | 
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| 87 | public function edit($id)  | 
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| 91 | |||
| 92 | /**  | 
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| 93 | * Update the specified resource in storage.  | 
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| 94 | *  | 
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| 95 | * @param \Illuminate\Http\Request $request  | 
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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 update(Request $request, $id)  | 
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| 122 | |||
| 123 | /**  | 
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| 124 | * Remove the specified resource from storage.  | 
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| 125 | *  | 
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| 126 | * @param int $id  | 
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| 127 | * @return \Illuminate\Http\Response  | 
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| 128 | */  | 
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| 129 | public function destroy($id)  | 
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| 139 | |||
| 140 | public function get_content($id)  | 
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| 145 | |||
| 146 | }  | 
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| 147 | 
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.