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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6 | trait Overflowable{ |
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8 | public function allWithOverflow() |
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14 | public function getColumns() |
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21 | View Code Duplication | public function overflow() |
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22 | { |
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23 | $columnNames = $this->getColumnNames(); |
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24 | $attributes = array_diff_key($this->request->all(), $columnNames); |
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25 | $attributes = json_encode($attributes); |
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26 | return $attributes; |
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27 | } |
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29 | public function getTableColumns() |
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34 | public function getColumnNames() |
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40 | } |
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: