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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14 | final class Exchange implements ExchangeInterface |
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15 | { |
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16 | private $connection; |
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17 | private $channel; |
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18 | |||
19 | 3 | public function __construct(Connection $connection, Channel $channel) |
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25 | 1 | View Code Duplication | public function declare(Declaration $command): ExchangeInterface |
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41 | 1 | View Code Duplication | public function delete(Deletion $command): ExchangeInterface |
56 | } |
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57 |