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 namespace App\Modules\Reporting\Repositories; |
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5 | class ReportRepository extends AbstractRepository |
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6 | { |
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7 | /** |
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8 | * Return the model full namespace. |
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9 | * |
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10 | * @return string |
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11 | */ |
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12 | protected function getModel() |
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17 | |||
18 | /** |
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19 | * Render the given report db view. |
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20 | * |
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21 | * @param integer $id |
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22 | * @param array $relations |
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23 | * @param array $columns |
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24 | * @return object |
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25 | */ |
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26 | public function find($id, $relations = [], $columns = array('*')) |
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43 | |||
44 | /** |
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45 | * Render the given report db view based on the given |
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46 | * condition. |
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47 | * |
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48 | * @param array $conditions array of conditions |
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49 | * @param array $relations |
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50 | * @param array $colunmns |
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51 | * @return object |
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52 | */ |
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53 | public function first($conditions, $relations = [], $columns = array('*')) |
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70 | } |
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71 |
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.