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