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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| 8 | class ModelWithObject |
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| 9 | { |
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| 10 | /** |
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| 11 | * ModelWithObject constructor. |
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| 12 | * @param DB $db |
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| 13 | * @param object $entity |
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| 14 | * @param Cache $cache |
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| 15 | */ |
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| 16 | 4 | public function __construct(DB $db, $entity, Cache $cache) |
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| 25 | /** |
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| 26 | * @return void |
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| 27 | */ |
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| 28 | 1 | public function create() |
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| 46 | |||
| 47 | /** |
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| 48 | * @param array $columns columns to update. if columns is empty array, update all of the columns |
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| 49 | * @return int rows updated |
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| 50 | */ |
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| 51 | 2 | public function update(array $columns=[]) |
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| 73 | |||
| 74 | /** |
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| 75 | * @return int rows deleted |
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| 76 | */ |
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| 77 | 1 | public function delete() |
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| 84 | |||
| 85 | 3 | /** |
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| 86 | * set entity table name |
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| 87 | 3 | * @param string $tableName |
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| 88 | 3 | * @return $this |
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| 89 | 3 | */ |
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| 90 | 3 | public function withTable($tableName) |
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| 95 | |||
| 96 | protected function getColumns() |
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| 104 | |||
| 105 | /** |
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| 106 | * @var object |
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| 107 | */ |
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| 108 | protected $object; |
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| 109 | |||
| 110 | /** |
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| 111 | * @var ModelContainer |
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| 112 | */ |
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| 113 | protected $entity; |
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| 114 | /** |
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| 115 | * @var DB |
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| 116 | */ |
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| 117 | protected $db; |
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| 118 | } |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.