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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| 17 | final class DoctrineCollectionDataSource extends FilterableDataSource implements IDataSource |
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| 18 | { |
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| 19 | |||
| 20 | /** |
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| 21 | * @var Collection |
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| 22 | */ |
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| 23 | private $data_source; |
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| 24 | |||
| 25 | /** |
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| 26 | * @var string |
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| 27 | */ |
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| 28 | private $primary_key; |
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| 29 | |||
| 30 | /** |
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| 31 | * @var Criteria |
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| 32 | */ |
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| 33 | private $criteria; |
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| 34 | |||
| 35 | /** |
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| 36 | * @var Collection |
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| 37 | */ |
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| 38 | private $matched; |
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| 39 | |||
| 40 | |||
| 41 | /** |
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| 42 | * @param Collection $collection |
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| 43 | * @param string $primary_key |
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| 44 | */ |
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| 45 | public function __construct(Collection $collection, $primary_key) |
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| 51 | |||
| 52 | |||
| 53 | /** |
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| 54 | * @return Collection |
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| 55 | */ |
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| 56 | private function getMatched() |
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| 64 | |||
| 65 | |||
| 66 | /******************************************************************************** |
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| 67 | * IDataSource implementation * |
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| 68 | ********************************************************************************/ |
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| 69 | |||
| 70 | |||
| 71 | /** |
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| 72 | * Get count of data |
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| 73 | * @return int |
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| 74 | */ |
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| 75 | public function getCount() |
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| 79 | |||
| 80 | |||
| 81 | /** |
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| 82 | * Get the data |
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| 83 | * @return array |
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| 84 | */ |
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| 85 | public function getData() |
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| 89 | |||
| 90 | |||
| 91 | /** |
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| 92 | * Filter data - get one row |
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| 93 | * @param array $condition |
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| 94 | * @return static |
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| 95 | */ |
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| 96 | public function filterOne(array $condition) |
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| 105 | |||
| 106 | |||
| 107 | /** |
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| 108 | * Filter by date |
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| 109 | * @param Filter\FilterDate $filter |
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| 110 | * @return void |
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| 111 | */ |
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| 112 | public function applyFilterDate(Filter\FilterDate $filter) |
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| 124 | |||
| 125 | |||
| 126 | /** |
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| 127 | * Filter by date range |
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| 128 | * @param Filter\FilterDateRange $filter |
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| 129 | * @return void |
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| 130 | */ |
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| 131 | public function applyFilterDateRange(Filter\FilterDateRange $filter) |
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| 153 | |||
| 154 | |||
| 155 | /** |
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| 156 | * Filter by range |
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| 157 | * @param Filter\FilterRange $filter |
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| 158 | * @return void |
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| 159 | */ |
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| 160 | public function applyFilterRange(Filter\FilterRange $filter) |
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| 174 | |||
| 175 | |||
| 176 | /** |
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| 177 | * Filter by keyword |
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| 178 | * @param Filter\FilterText $filter |
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| 179 | * @return void |
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| 180 | */ |
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| 181 | public function applyFilterText(Filter\FilterText $filter) |
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| 200 | |||
| 201 | |||
| 202 | /** |
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| 203 | * Filter by multi select value |
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| 204 | * @param Filter\FilterMultiSelect $filter |
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| 205 | * @return void |
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| 206 | */ |
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| 207 | public function applyFilterMultiSelect(Filter\FilterMultiSelect $filter) |
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| 214 | |||
| 215 | |||
| 216 | /** |
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| 217 | * Filter by select value |
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| 218 | * @param Filter\FilterSelect $filter |
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| 219 | * @return void |
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| 220 | */ |
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| 221 | public function applyFilterSelect(Filter\FilterSelect $filter) |
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| 228 | |||
| 229 | |||
| 230 | /** |
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| 231 | * Apply limit and offset on data |
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| 232 | * @param int $offset |
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| 233 | * @param int $limit |
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| 234 | * @return static |
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| 235 | */ |
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| 236 | public function limit($offset, $limit) |
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| 242 | |||
| 243 | |||
| 244 | /** |
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| 245 | * Sort data |
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| 246 | * @param Sorting $sorting |
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| 247 | * @return static |
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| 248 | */ |
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| 249 | public function sort(Sorting $sorting) |
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| 270 | |||
| 271 | } |
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| 272 |
This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.