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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| 21 | class ForgeCommand extends AbstractCommand  | 
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| 22 | { | 
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| 23 | /**  | 
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| 24 | * AbstractCommand constructor.  | 
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| 25 | *  | 
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| 26 | * @param Payload $payload  | 
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| 27 | * @param RealTimeClient $client  | 
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| 28 | * @param array|null $configuration  | 
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| 29 | */  | 
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| 30 | 9 | View Code Duplication | public function __construct(Payload $payload, RealTimeClient $client, array $configuration = null)  | 
            
| 39 | |||
| 40 | /**  | 
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| 41 | * process show.  | 
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| 42 | *  | 
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| 43 | * @return string  | 
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| 44 | */  | 
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| 45 | 8 | protected function processShow() : string  | 
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| 62 | }  | 
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| 63 |