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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| 13 | trait AliasesLoaderTrait |
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| 14 | { |
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| 15 | |||
| 16 | |||
| 17 | /** |
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| 18 | * @param array $aliases |
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| 19 | */ |
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| 20 | View Code Duplication | public function loadShipInternalAliases() |
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| 29 | |||
| 30 | /** |
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| 31 | * loadContainersInternalAliases |
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| 32 | */ |
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| 33 | View Code Duplication | public function loadContainersInternalAliases() |
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| 42 | |||
| 43 | /** |
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| 44 | * @param $aliasKey |
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| 45 | * @param $aliasValue |
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| 46 | */ |
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| 47 | private function loadAlias($aliasKey, $aliasValue) |
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| 51 | } |
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| 52 |
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italyis not defined by the methodfinale(...).The most likely cause is that the parameter was removed, but the annotation was not.