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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22 | class XmlAuthorizationRequest extends XmlRequest |
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23 | { |
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24 | /** |
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25 | * @var array |
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26 | */ |
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27 | protected $optionalParameters = [ |
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28 | 'reqtype', |
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29 | 'uppCustomerIpAddress' |
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30 | ]; |
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31 | |||
32 | /** |
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33 | * @var string |
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34 | */ |
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35 | protected $apiEndpoint = 'XML_authorize.jsp'; |
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36 | |||
37 | /** |
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38 | * @var string |
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39 | */ |
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40 | protected $serviceName = 'authorizationService'; |
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41 | |||
42 | /** |
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43 | * @var int |
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44 | */ |
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45 | protected $serviceVersion = 3; |
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46 | |||
47 | /** |
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48 | * @return array |
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49 | */ |
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50 | public function getData() |
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76 | |||
77 | /** |
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78 | * @param $data |
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79 | * @return XmlAuthorizationResponse |
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80 | */ |
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81 | protected function createResponse($data) |
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85 | } |
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86 |
Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: