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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15 | class UserController extends Controller |
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16 | { |
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17 | /** |
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18 | * Constructor |
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19 | */ |
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20 | public function __construct() |
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21 | { |
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22 | parent::__construct(); |
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23 | |||
24 | $action = Route::getFacadeRoot()->current()->getActionMethod(); |
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25 | |||
26 | if (in_array($action, ['index', 'show'])) { |
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27 | $this->breadcrumbs->addCrumb('Users', route('users.user.index')); |
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28 | } |
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29 | } |
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30 | |||
31 | /** |
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32 | * Show all the users. |
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33 | * |
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34 | * @return \Illuminate\View\View |
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35 | */ |
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36 | public function index(): View |
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40 | |||
41 | /** |
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42 | * Show the user profile page. |
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43 | * |
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44 | * @param string $slug The slug of the user. |
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45 | * |
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46 | * @return \Illuminate\Http\RedirectResponse|\Illuminate\View\View |
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47 | */ |
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48 | public function show(Request $request, string $slug) |
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77 | |||
78 | /** |
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79 | * Show the settings form. |
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80 | * |
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81 | * @return \Illuminate\View\View |
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82 | */ |
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83 | public function showSettingsForm(): View |
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91 | |||
92 | /** |
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93 | * Handle an update request for the user. |
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94 | * |
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95 | * @param \Illuminate\Http\Request $request |
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96 | * |
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97 | * @return \Illuminate\Http\RedirectResponse |
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98 | */ |
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99 | public function update(Request $request): RedirectResponse |
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116 | |||
117 | /** |
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118 | * Handle the delete request for the user. |
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119 | * |
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120 | * @param \Illuminate\Http\Request $request |
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121 | * |
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122 | * @return \Illuminate\Http\RedirectResponse |
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123 | */ |
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124 | View Code Duplication | public function delete(Request $request): RedirectResponse |
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145 | |||
146 | /** |
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147 | * Handle a E-mail update request for the user. |
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148 | * |
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149 | * @param \Illuminate\Http\Request $request |
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150 | * |
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151 | * @return \Illuminate\Http\RedirectResponse |
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152 | */ |
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153 | protected function updateEmail(Request $request): RedirectResponse |
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162 | |||
163 | /** |
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164 | * Handle a Password update request for the user. |
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165 | * |
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166 | * @param \Illuminate\Http\Request $request |
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167 | * |
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168 | * @return \Illuminate\Http\RedirectResponse |
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169 | */ |
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170 | protected function updatePassword(Request $request): RedirectResponse |
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187 | } |
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188 |
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: