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 | |||
36 | /** |
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37 | * @param Collection $collection |
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38 | * @param string $primary_key |
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39 | */ |
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40 | public function __construct(Collection $collection, $primary_key) |
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46 | |||
47 | |||
48 | /** |
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49 | * @return Collection |
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50 | */ |
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51 | private function getFilteredCollection() |
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55 | |||
56 | |||
57 | /******************************************************************************** |
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58 | * IDataSource implementation * |
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59 | ********************************************************************************/ |
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60 | |||
61 | |||
62 | /** |
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63 | * Get count of data |
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64 | * @return int |
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65 | */ |
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66 | public function getCount() |
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70 | |||
71 | |||
72 | /** |
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73 | * Get the data |
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74 | * @return array |
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75 | */ |
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76 | public function getData() |
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80 | |||
81 | |||
82 | /** |
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83 | * Filter data - get one row |
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84 | * @param array $condition |
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85 | * @return static |
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86 | */ |
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87 | public function filterOne(array $condition) |
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96 | |||
97 | |||
98 | /** |
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99 | * Filter by date |
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100 | * @param Filter\FilterDate $filter |
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101 | * @return void |
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102 | */ |
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103 | public function applyFilterDate(Filter\FilterDate $filter) |
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115 | |||
116 | |||
117 | /** |
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118 | * Filter by date range |
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119 | * @param Filter\FilterDateRange $filter |
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120 | * @return void |
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121 | */ |
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122 | public function applyFilterDateRange(Filter\FilterDateRange $filter) |
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144 | |||
145 | |||
146 | /** |
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147 | * Filter by range |
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148 | * @param Filter\FilterRange $filter |
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149 | * @return void |
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150 | */ |
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151 | public function applyFilterRange(Filter\FilterRange $filter) |
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165 | |||
166 | |||
167 | /** |
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168 | * Filter by keyword |
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169 | * @param Filter\FilterText $filter |
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170 | * @return void |
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171 | */ |
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172 | public function applyFilterText(Filter\FilterText $filter) |
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191 | |||
192 | |||
193 | /** |
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194 | * Filter by multi select value |
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195 | * @param Filter\FilterMultiSelect $filter |
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196 | * @return void |
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197 | */ |
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198 | public function applyFilterMultiSelect(Filter\FilterMultiSelect $filter) |
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205 | |||
206 | |||
207 | /** |
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208 | * Filter by select value |
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209 | * @param Filter\FilterSelect $filter |
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210 | * @return void |
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211 | */ |
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212 | public function applyFilterSelect(Filter\FilterSelect $filter) |
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219 | |||
220 | |||
221 | /** |
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222 | * Apply limit and offset on data |
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223 | * @param int $offset |
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224 | * @param int $limit |
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225 | * @return static |
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226 | */ |
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227 | public function limit($offset, $limit) |
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233 | |||
234 | |||
235 | /** |
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236 | * Sort data |
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237 | * @param Sorting $sorting |
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238 | * @return static |
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239 | */ |
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240 | public function sort(Sorting $sorting) |
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261 | |||
262 | } |
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263 |
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.