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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| 11 | class LocalizerMiddleware |
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| 12 | { |
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| 13 | /** |
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| 14 | * This function checks if language to set is an allowed lang of config. |
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| 15 | * |
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| 16 | * @param string $lang |
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| 17 | **/ |
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| 18 | private function setIfAllowed($lang) |
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| 27 | |||
| 28 | /** |
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| 29 | * This function checks if user is logged in, and loads the prefered language. |
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| 30 | * |
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| 31 | * @param string $lang |
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| 32 | **/ |
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| 33 | public function setLang() |
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| 60 | |||
| 61 | /** |
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| 62 | * Handle an incoming request. |
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| 63 | * |
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| 64 | * @param \Illuminate\Http\Request $request |
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| 65 | * @param \Closure $next |
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| 66 | * |
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| 67 | * @return mixed |
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| 68 | */ |
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| 69 | public function handle($request, Closure $next) |
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| 75 | } |
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| 76 |
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.