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 declare(strict_types=1); |
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12 | class DragonApiController |
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13 | { |
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14 | /** @var DragonService $service */ |
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15 | private $service; |
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16 | |||
17 | /** |
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18 | * DragonController constructor. |
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19 | * @param DragonService $service |
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20 | */ |
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21 | public function __construct(DragonService $service) |
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25 | |||
26 | /** |
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27 | * Controller. |
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28 | * |
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29 | * @param \Psr\Http\Message\ServerRequestInterface $request |
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30 | * |
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31 | * @return \Psr\Http\Message\ResponseInterface |
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32 | */ |
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33 | public function indexAction(ServerRequestInterface $request, array $args) : ResponseInterface |
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40 | |||
41 | /** |
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42 | * @param ServerRequestInterface $request |
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43 | * @param array $args |
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44 | * @return ResponseInterface |
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45 | * @throws \Doctrine\ORM\ORMException |
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46 | * @throws \Doctrine\ORM\OptimisticLockException |
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47 | */ |
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48 | public function createAction(ServerRequestInterface $request, array $args) : ResponseInterface |
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68 | |||
69 | /** |
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70 | * @param ServerRequestInterface $request |
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71 | * @param array $args |
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72 | * @return ResponseInterface |
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73 | * @throws \Doctrine\ORM\EntityNotFoundException |
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74 | */ |
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75 | public function viewAction(ServerRequestInterface $request, array $args) : ResponseInterface |
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81 | |||
82 | /** |
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83 | * @param ServerRequestInterface $request |
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84 | * @param array $args |
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85 | * @return ResponseInterface |
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86 | * @throws \Doctrine\ORM\EntityNotFoundException |
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87 | * @throws \Doctrine\ORM\ORMException |
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88 | * @throws \Doctrine\ORM\OptimisticLockException |
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89 | */ |
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90 | public function updateAction(ServerRequestInterface $request, array $args) : ResponseInterface |
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113 | |||
114 | /** |
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115 | * @param ServerRequestInterface $request |
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116 | * @param array $args |
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117 | * @return ResponseInterface |
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118 | * @throws \Doctrine\ORM\EntityNotFoundException |
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119 | * @throws \Doctrine\ORM\ORMException |
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120 | * @throws \Doctrine\ORM\OptimisticLockException |
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121 | */ |
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122 | public function deleteAction(ServerRequestInterface $request, array $args) : ResponseInterface |
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129 | } |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.