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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24 | final class RaListingSearchQuery implements HttpQuery |
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25 | { |
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26 | /** |
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27 | * @var string |
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28 | */ |
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29 | private $actorInstitution; |
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30 | |||
31 | /** |
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32 | * @var int |
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33 | */ |
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34 | private $pageNumber; |
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35 | |||
36 | /** |
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37 | * @var string|null |
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38 | */ |
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39 | private $orderBy = 'commonName'; |
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40 | |||
41 | /** |
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42 | * @var string|null |
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43 | */ |
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44 | private $orderDirection = 'asc'; |
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45 | |||
46 | /** |
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47 | * @param string $institution |
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48 | * @param int $pageNumber |
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49 | */ |
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50 | View Code Duplication | public function __construct($actorInstitution, $pageNumber) |
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60 | |||
61 | /** |
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62 | * @param string $orderBy |
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63 | * @return RaListingSearchQuery |
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64 | */ |
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65 | public function setOrderBy($orderBy) |
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73 | |||
74 | /** |
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75 | * @param string|null $orderDirection |
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76 | * @return RaListingSearchQuery |
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77 | */ |
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78 | View Code Duplication | public function setOrderDirection($orderDirection) |
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89 | |||
90 | private function assertNonEmptyString($value, $parameterName) |
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91 | { |
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92 | $message = sprintf( |
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93 | '"%s" must be a non-empty string, "%s" given', |
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94 | $parameterName, |
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95 | (is_object($value) ? get_class($value) : gettype($value)) |
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96 | ); |
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97 | |||
98 | Assert\that($value)->string($message)->notEmpty($message); |
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99 | } |
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100 | |||
101 | public function toHttpQuery() |
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117 | } |
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118 |
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function. It has, however, found a similar but not annotated parameter which might be a good fit.
Consider the following example. The parameter
$ireland
is not defined by the methodfinale(...)
.The most likely cause is that the parameter was changed, but the annotation was not.