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:
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25 | View Code Duplication | class Having implements Specification |
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26 | { |
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27 | /** |
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28 | * @var Filter|QueryModifier|string |
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29 | */ |
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30 | protected $child; |
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31 | |||
32 | /** |
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33 | * @param Filter|QueryModifier|string $child |
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34 | */ |
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35 | public function __construct($child) |
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39 | |||
40 | /** |
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41 | * @param QueryBuilder $qb |
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42 | * @param string $dqlAlias |
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43 | */ |
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44 | public function modify(QueryBuilder $qb, $dqlAlias) |
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56 | |||
57 | /** |
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58 | * @param QueryBuilder $qb |
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59 | * @param string $dqlAlias |
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60 | * |
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61 | * @return string |
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62 | */ |
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63 | public function getFilter(QueryBuilder $qb, $dqlAlias) |
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67 | } |
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68 |
If you suppress an error, we recommend checking for the error condition explicitly: