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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8 | class DeviceDetector extends BrowserDetector |
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9 | { |
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10 | public function detect(string $ua) |
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18 | View Code Duplication | private function initResultObject() |
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28 | View Code Duplication | private function setupResultObject() |
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40 | } |
Overwriting private methods is generally fine as long as you also use private visibility. It might still be preferable for understandability to use a different method name.