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 UserInvitationObserver |
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13 | { |
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14 | |||
15 | public $service; |
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16 | |||
17 | /** |
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18 | * UserInvitationObserver constructor. |
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19 | * |
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20 | * @param $service |
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21 | */ |
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22 | public function __construct(UserInvitations $service) |
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23 | { |
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24 | $this->service = $service; |
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25 | } |
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26 | |||
27 | /** |
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28 | * Listen to the UserInvitation created event. |
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29 | * |
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30 | * @param UserInvitation $invitation |
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31 | * @return void |
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32 | */ |
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33 | public function created(UserInvitation $invitation) |
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34 | { |
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35 | $this->service->send($invitation); |
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36 | } |
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37 | |||
38 | /** |
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39 | * Listen to the UserInvitation deleting event. |
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40 | * |
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41 | * @param UserInvitation $invitation |
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42 | * @return void |
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43 | */ |
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44 | public function deleting(UserInvitation $invitation) |
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45 | { |
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46 | // |
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47 | } |
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48 | |||
49 | /** |
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50 | * Listen to the UserInvitation deleted event. |
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51 | */ |
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52 | View Code Duplication | public function deleted(UserInvitation $invitation) |
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68 | } |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.