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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| 22 | View Code Duplication | class AddCollapseIdHeaderVisitor implements HttpProtocolVisitorInterface |
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| 23 | { |
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| 24 | /** |
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| 25 | * {@inheritdoc} |
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| 26 | */ |
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| 27 | public function visit(Notification $notification, Request $request): Request |
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| 37 | } |
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| 38 |