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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| 13 | class CompletePurchaseRequest extends PurchaseRequest |
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| 14 | { |
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| 15 | |||
| 16 | protected $endpoint = "https://payments.paystation.co.nz/lookup/"; |
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| 17 | |||
| 18 | 7 | public function getData() |
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| 36 | |||
| 37 | 6 | View Code Duplication | public function sendData($data) |
| 44 | } |
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.