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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| 10 | class Select_Field extends Predefined_Options_Field { | 
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| 11 | /**  | 
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| 12 | 	 * {@inheritDoc} | 
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| 13 | */  | 
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| 14 | 	public function set_value_from_input( $input ) { | 
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| 32 | |||
| 33 | /**  | 
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| 34 | 	 * {@inheritDoc} | 
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| 35 | */  | 
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| 36 | View Code Duplication | 	public function to_json( $load ) { | 
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| 49 | |||
| 50 | /**  | 
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| 51 | 	 * {@inheritDoc} | 
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| 52 | */  | 
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| 53 | 	public function get_formatted_value() { | 
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| 65 | }  | 
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| 66 |