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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| 5 | abstract class Input  | 
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| 6 | { | 
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| 7 | /**  | 
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| 8 | * Input.  | 
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| 9 | *  | 
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| 10 | * @var string  | 
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| 11 | */  | 
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| 12 | protected $input;  | 
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| 13 | |||
| 14 | /**  | 
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| 15 | * Original input string.  | 
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| 16 | *  | 
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| 17 | * @var string  | 
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| 18 | */  | 
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| 19 | protected $original;  | 
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| 20 | |||
| 21 | /**  | 
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| 22 | * Input name.  | 
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| 23 | *  | 
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| 24 | * @var string  | 
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| 25 | */  | 
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| 26 | protected $name;  | 
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| 27 | |||
| 28 | /**  | 
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| 29 | * Input description.  | 
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| 30 | *  | 
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| 31 | * @var null|string  | 
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| 32 | */  | 
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| 33 | protected $description;  | 
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| 34 | |||
| 35 | /**  | 
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| 36 | * Array of input modes to apply.  | 
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| 37 | *  | 
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| 38 | * @var array  | 
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| 39 | */  | 
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| 40 | protected $modeArray = [];  | 
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| 41 | |||
| 42 | /**  | 
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| 43 | * Argument mode.  | 
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| 44 | *  | 
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| 45 | * @var int  | 
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| 46 | */  | 
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| 47 | protected $mode = 0;  | 
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| 48 | |||
| 49 | /**  | 
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| 50 | * Construct.  | 
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| 51 | *  | 
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| 52 | * @param string $input  | 
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| 53 | */  | 
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| 54 | public function __construct($input)  | 
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| 59 | |||
| 60 | /**  | 
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| 61 | * Parse the set input string.  | 
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| 62 | *  | 
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| 63 | * @return $this  | 
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| 64 | */  | 
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| 65 | abstract public function parse();  | 
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| 66 | |||
| 67 | /**  | 
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| 68 | * Get the input attributes.  | 
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| 69 | *  | 
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| 70 | * @return array  | 
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| 71 | */  | 
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| 72 | abstract public function getAttributes();  | 
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| 73 | |||
| 74 | /**  | 
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| 75 | * Set array modeArray value if value contains *.  | 
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| 76 | *  | 
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| 77 | * @param string $constant  | 
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| 78 | *  | 
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| 79 | * @return $this  | 
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| 80 | */  | 
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| 81 | View Code Duplication | protected function setArray($constant)  | 
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| 91 | |||
| 92 | /**  | 
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| 93 | * Parse an argument/option description.  | 
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| 94 | *  | 
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| 95 | * @return $this  | 
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| 96 | */  | 
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| 97 | protected function setDescription()  | 
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| 109 | |||
| 110 | /**  | 
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| 111 | * Calculate the mode score.  | 
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| 112 | *  | 
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| 113 | * @param string $class  | 
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| 114 | *  | 
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| 115 | * @return $this  | 
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| 116 | */  | 
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| 117 | protected function calculateMode($class)  | 
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| 125 | |||
| 126 | /**  | 
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| 127 | * Set the input name as the input value.  | 
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| 128 | *  | 
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| 129 | * @return $this  | 
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| 130 | */  | 
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| 131 | protected function setName()  | 
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| 137 | }  | 
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| 138 |