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:
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10 | View Code Duplication | class AdminEvent extends Event |
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11 | { |
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12 | /** |
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13 | * @var AdminInterface |
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14 | */ |
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15 | private $admin; |
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18 | * @var ActionInterface |
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20 | private $action; |
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23 | * @var Request |
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24 | */ |
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25 | private $request; |
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28 | * AdminEvent constructor. |
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29 | * |
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30 | * @param AdminInterface $admin |
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31 | * @param Request $request |
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32 | */ |
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33 | public function __construct(AdminInterface $admin, Request $request) |
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40 | * @return AdminInterface |
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42 | public function getAdmin(): AdminInterface |
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48 | * @return ActionInterface |
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49 | */ |
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50 | public function getAction(): ActionInterface |
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56 | * @return bool |
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58 | public function hasAction(): bool |
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64 | * @param ActionInterface $action |
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66 | public function setAction(ActionInterface $action) |
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72 | * @return Request |
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73 | */ |
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74 | public function getRequest(): Request |
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78 | } |
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Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.