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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8 | class User extends ActiveRecordModelExtender |
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9 | { |
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10 | |||
11 | /** |
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12 | * @var string $tableName name of the database table. |
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13 | */ |
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14 | protected $tableName = "ramverk1_users"; |
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15 | |||
16 | /** |
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17 | * Columns in the table. |
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18 | * |
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19 | * @var integer $id primary key auto incremented. |
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20 | */ |
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21 | public $id; |
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22 | public $name; |
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23 | public $email; |
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24 | public $pass; |
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25 | public $authority = "user"; |
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26 | public $question; |
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27 | |||
28 | 7 | public function getReputation($user) |
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59 | |||
60 | |||
61 | /** |
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62 | * Sets up user |
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63 | * @param object $user |
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64 | * @param array $param |
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65 | * |
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66 | * @return object |
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67 | */ |
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68 | 7 | public function setupUser($user) |
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98 | |||
99 | /** |
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100 | * Returns post with markdown and gravatar |
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101 | * @param string $sql |
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102 | * @param array $param |
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103 | * |
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104 | * @return array |
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105 | */ |
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106 | 3 | View Code Duplication | public function getAllUsers($sql = null, $params = null) |
117 | |||
118 | /** |
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119 | * return question/answer, three attributes are set, comments connected to them is an array. |
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120 | * |
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121 | * @return object |
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122 | */ |
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123 | 4 | public function getUser($name) |
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129 | |||
130 | |||
131 | /** |
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132 | * Check if user exists |
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133 | * |
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134 | * @param string $name |
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135 | * |
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136 | * @return boolean true if user exists in database else false |
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137 | */ |
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138 | 1 | public function userExists($name) |
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143 | /** |
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144 | * Returns gravatar link |
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145 | * |
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146 | * @param string $email |
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147 | * |
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148 | * @return string as gravatar link |
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149 | */ |
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150 | 1 | public function setGravatar() |
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154 | |||
155 | /** |
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156 | * Returns gravatar link |
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157 | * |
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158 | * @param string $name |
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159 | * |
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160 | * @return string as gravatar link |
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161 | */ |
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162 | 10 | public function getGravatar($name) |
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167 | |||
168 | /** |
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169 | * Set the pass. |
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170 | * |
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171 | * @param string $pass the pass to use. |
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172 | * |
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173 | * @return void |
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174 | */ |
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175 | 4 | public function setPassword($pass) |
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179 | |||
180 | /** |
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181 | * Verify the name and the pass, if successful the object contains |
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182 | * all details from the database row. |
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183 | * |
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184 | * @param string $name name to check. |
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185 | * @param string $pass the pass to use. |
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186 | * |
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187 | * @return boolean true if name and pass matches, else false. |
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188 | */ |
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189 | 3 | public function verifyPassword($name, $pass) |
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194 | |||
195 | /** |
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196 | * Verify the name and the anaswer, if successful the object contains |
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197 | * all details from the database row. |
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198 | * |
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199 | * @param string $name name to check. |
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200 | * @param string $answer the answer. |
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201 | * |
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202 | * @return boolean true if name and pass matches, else false. |
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203 | */ |
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204 | 1 | public function verifyQuestion($name, $answer) |
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209 | |||
210 | |||
211 | /** |
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212 | * Check if a post belongs to user |
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213 | * |
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214 | * |
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215 | * @return boolean |
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216 | */ |
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217 | 2 | public function controlAuthority($loggedUser, $name) |
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226 | } |
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227 |
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italy
is not defined by the methodfinale(...)
.The most likely cause is that the parameter was removed, but the annotation was not.