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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9 | trait ApiConnTrait |
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10 | { |
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11 | /** |
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12 | * @param Request $request |
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13 | * @return mixed |
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14 | */ |
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15 | abstract function dispatch(Request $request); |
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16 | |||
17 | /** |
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18 | * @override |
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19 | * @inheritDoc |
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20 | */ |
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21 | public function auth($password) |
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28 | |||
29 | /** |
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30 | * @override |
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31 | * @inheritDoc |
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32 | */ |
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33 | View Code Duplication | public function ping($message = 'PING') |
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40 | |||
41 | /** |
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42 | * @override |
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43 | * @inheritDoc |
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44 | */ |
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45 | public function quit() |
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51 | |||
52 | /** |
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53 | * @override |
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54 | * @inheritDoc |
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55 | */ |
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56 | public function select($index) |
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63 | } |
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64 |
Adding explicit visibility (
private
,protected
, orpublic
) is generally recommend to communicate to other developers how, and from where this method is intended to be used.