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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| 9 | 	class Grunion_Contact_Form_Endpoint extends WP_REST_Posts_Controller { | 
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| 10 | /**  | 
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| 11 | * Check whether a given request has proper authoriztion to view feedback items.  | 
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| 12 | *  | 
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| 13 | * @param WP_REST_Request $request Full details about the request.  | 
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| 14 | * @return WP_Error|boolean  | 
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| 15 | */  | 
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| 16 | View Code Duplication | 		public function get_items_permissions_check( $request ) { | 
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| 27 | |||
| 28 | /**  | 
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| 29 | * Check whether a given request has proper authoriztion to view feedback item.  | 
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| 30 | *  | 
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| 31 | * @param WP_REST_Request $request Full details about the request.  | 
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| 32 | * @return WP_Error|boolean  | 
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| 33 | */  | 
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| 34 | View Code Duplication | 		public function get_item_permissions_check( $request ) { | 
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| 45 | |||
| 46 | }  | 
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