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 |
||
| 12 | class InMemoryStorage implements Storage |
||
| 13 | { |
||
| 14 | /** |
||
| 15 | * The data collection. |
||
| 16 | * |
||
| 17 | * @var array |
||
| 18 | */ |
||
| 19 | private $data; |
||
| 20 | |||
| 21 | /** |
||
| 22 | * Constructor. |
||
| 23 | * |
||
| 24 | * @param mixed $data The data |
||
| 25 | */ |
||
| 26 | public function __construct($data) |
||
| 30 | |||
| 31 | /** |
||
| 32 | * {@inheritdoc} |
||
| 33 | */ |
||
| 34 | View Code Duplication | public function findAll($limit, $offset) |
|
| 47 | |||
| 48 | /** |
||
| 49 | * {@inheritdoc} |
||
| 50 | */ |
||
| 51 | View Code Duplication | public function query(array $criteria, $limit, $offset) |
|
| 69 | |||
| 70 | /** |
||
| 71 | * {@inheritdoc} |
||
| 72 | */ |
||
| 73 | public function properties() |
||
| 81 | |||
| 82 | /** |
||
| 83 | * {@inheritdoc} |
||
| 84 | */ |
||
| 85 | public function size() |
||
| 89 | |||
| 90 | /** |
||
| 91 | * Paginates the given collection of data. |
||
| 92 | * |
||
| 93 | * @param array $data The collection data |
||
| 94 | * @param int $limit Logs per page |
||
| 95 | * @param int $offset The number of the page |
||
| 96 | * |
||
| 97 | * @return array |
||
| 98 | */ |
||
| 99 | private function paginate($data, $limit, $offset) |
||
| 103 | |||
| 104 | /** |
||
| 105 | * Compares the given two items. |
||
| 106 | * |
||
| 107 | * @param mixed $item1 The first item |
||
| 108 | * @param mixed $item2 The second item |
||
| 109 | * |
||
| 110 | * @return int |
||
| 111 | */ |
||
| 112 | View Code Duplication | private function sort($item1, $item2) |
|
| 130 | } |
||
| 131 |
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..