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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45 |
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.