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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15 | trait GithubCommitConvertTrait |
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18 | * @param array $data |
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20 | * @return GithubCommitSource |
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21 | */ |
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22 | protected function convertCommit(array $data) |
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36 | * @param array $data |
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37 | * |
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38 | * @return GithubUserSource |
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39 | */ |
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40 | View Code Duplication | protected function getAuthor(array $data) |
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52 | /** |
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53 | * @param array $data |
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54 | * |
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55 | * @return GithubUserSource |
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57 | View Code Duplication | protected function getCommitter(array $data) |
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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: