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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12 | class VKUsers extends VKAPI { |
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13 | |||
14 | /** |
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15 | * API Method for this class |
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16 | * @var string |
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17 | */ |
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18 | protected $apiMethod = 'users.'; |
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19 | |||
20 | /** |
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21 | * Default Fields For Selection |
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22 | */ |
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23 | const standardFields = [ 'sex', 'online', 'country', 'city', 'bdate' ]; |
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24 | |||
25 | /** |
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26 | * VKUsers constructor. |
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27 | * @param VKBase $vkObject |
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28 | */ |
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29 | public function __construct(VKBase $vkObject) { |
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33 | |||
34 | /** |
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35 | * Returns detailed information on users |
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36 | * @param string[] $usersIDs |
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37 | * @param array $requestFields |
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38 | * @param string $nameCase |
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39 | * @return mixed |
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40 | * @throws VKException |
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41 | */ |
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42 | public function get($usersIDs, $requestFields = self::standardFields, $nameCase = 'nom') { |
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58 | |||
59 | /** |
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60 | * Returns a list of users matching the search criteria |
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61 | * @param string $searchQuery |
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62 | * @param int $isOnline |
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63 | * @param array $requestFields |
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64 | * @param int $sortBy |
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65 | * @param int $displayCount |
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66 | * @return array |
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67 | * @throws VKException |
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68 | */ |
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69 | public function search($searchQuery, $isOnline = 1, $requestFields = self::standardFields, $sortBy = 0, $displayCount = 5) { |
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88 | |||
89 | /** |
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90 | * Returns information whether a user installed the application |
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91 | * @param int $userID |
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92 | * @return mixed |
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93 | * @throws VKException |
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94 | */ |
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95 | public function isAppUser($userID) { |
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102 | |||
103 | /** |
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104 | * Returns a list of IDs of users and communities followed by the user |
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105 | * @param int $userID |
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106 | * @param int $combineResults |
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107 | * @param array $requestFields |
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108 | * @param int $resultCount |
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109 | * @return mixed |
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110 | * @throws VKException |
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111 | */ |
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112 | View Code Duplication | public function getSubscriptions($userID, $combineResults = 0, $requestFields = self::standardFields, $resultCount = 20) { |
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122 | |||
123 | /** |
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124 | * Returns a list of IDs of followers of the user in question, sorted by date added, most recent first |
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125 | * @param int $userID |
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126 | * @param int $setOffset |
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127 | * @param int $displayCount |
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128 | * @param array $requestFields |
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129 | * @param string $nameCase |
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130 | * @return mixed |
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131 | * @throws VKException |
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132 | */ |
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133 | View Code Duplication | public function getFollowers($userID, $setOffset = 0, $displayCount = 100, $requestFields = self::standardFields, $nameCase = 'nom') { |
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144 | |||
145 | /** |
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146 | * Get Nearby Users Based On Current Latitude and Longitude |
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147 | * @param float $currentLatitude |
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148 | * @param float $currentLongitude |
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149 | * @param int $setTimeOut |
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150 | * @param int $setRadius |
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151 | * @param array $requestFields |
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152 | * @param string $nameCase |
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153 | * @return mixed |
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154 | * @throws VKException |
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155 | */ |
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156 | public function getNearby($currentLatitude, $currentLongitude, $setTimeOut = 7200, $setRadius = 1, $requestFields = self::standardFields, $nameCase = 'nom') { |
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168 | |||
169 | /** |
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170 | * Return fields which are allowed to be used |
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171 | * @param $fieldsArray |
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172 | * @return string |
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173 | */ |
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174 | private function returnAllowedFields($fieldsArray) { |
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184 | |||
185 | /** |
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186 | * Return Allowed Name Case |
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187 | * @param string $ncValue |
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188 | * @return string |
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189 | */ |
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190 | private function returnAllowedNC($ncValue) { |
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197 | } |
This check looks for a call to a parent method whose name is different than the method from which it is called.
Consider the following code:
The
getFirstName()
method in theSon
calls the wrong method in the parent class.