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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7 | abstract class AbstractDatasource implements DatasourceInterface |
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8 | { |
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9 | protected $regions; |
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10 | protected $departements; |
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11 | protected $index; |
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12 | |||
13 | public function __construct() { |
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23 | |||
24 | protected function slugify($value) { |
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31 | |||
32 | protected function addToIndex($type, $value, $key) { |
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36 | public function findAllDepartements($sortByValue = false) { |
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43 | |||
44 | public function findAllRegions($sortByValue = false) { |
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51 | |||
52 | public function findAllCommunes() { |
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55 | |||
56 | public function findCommunesByZipcode($zipcode) { |
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59 | |||
60 | public function findDepartementByCode($departementCode) { |
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63 | |||
64 | View Code Duplication | public function findDepartementByName($departementName) { |
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75 | |||
76 | View Code Duplication | public function findRegionByName($regionName) { |
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87 | |||
88 | public function findRegionByCode($regionCode) { |
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91 | |||
92 | protected function sortByValue($collection) { |
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100 | } |
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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: