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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36 | trait EmailTrait |
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37 | { |
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38 | use MailableRecordTrait; |
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39 | use HasMediaTrait; |
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40 | use MergeTagsRecordTrait; |
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41 | |||
42 | public function populateFromConfig() |
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52 | |||
53 | /** |
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54 | * @param Record $item |
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55 | */ |
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56 | public function populateFromItem($item) |
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61 | |||
62 | /** |
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63 | * @inheritdoc |
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64 | * Used to decode html entities to proper chars |
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65 | */ |
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66 | public function getFrom() |
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70 | |||
71 | /** |
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72 | * @return string |
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73 | */ |
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74 | public function getPreviewBody() |
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78 | |||
79 | /** |
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80 | * @return string |
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81 | */ |
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82 | public function getBody() |
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86 | |||
87 | /** |
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88 | * @return string |
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89 | */ |
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90 | public function getSubject() |
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94 | |||
95 | /** |
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96 | * @return array |
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97 | */ |
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98 | public function getTos() |
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113 | |||
114 | /** |
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115 | * @return mixed |
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116 | */ |
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117 | 1 | public function insert() |
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124 | |||
125 | public function delete() |
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130 | |||
131 | public function clearAttachments() |
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135 | |||
136 | |||
137 | /** |
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138 | * @param Message $message |
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139 | */ |
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140 | public function buildMailMessageAttachments(&$message) |
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149 | |||
150 | /** |
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151 | * @return array|null |
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152 | */ |
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153 | protected function getCustomArgs() |
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161 | |||
162 | /** |
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163 | * @param null $value |
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164 | * @return bool |
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165 | */ |
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166 | public function IsHTML($value = null) |
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174 | |||
175 | /** |
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176 | * @return mixed |
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177 | */ |
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178 | View Code Duplication | public function getActivitiesByEmail() |
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191 | |||
192 | /** |
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193 | * @return mixed |
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194 | */ |
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195 | View Code Duplication | public function getLinksByEmail() |
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208 | |||
209 | /** |
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210 | * @param Mailer $mailer |
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211 | * @param Message $message |
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212 | * @param $response |
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213 | */ |
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214 | protected function afterSend($mailer, $message, $response) |
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230 | } |
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231 |
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.