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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| 18 | class NaptrRecord extends Record  | 
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| 19 | { | 
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| 20 | /**  | 
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| 21 | * @var Int  | 
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| 22 | */  | 
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| 23 | protected $order;  | 
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| 24 | /**  | 
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| 25 | * @var Int  | 
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| 26 | */  | 
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| 27 | protected $preference;  | 
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| 28 | /**  | 
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| 29 | * @var int  | 
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| 30 | */  | 
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| 31 | protected $flags;  | 
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| 32 | /**  | 
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| 33 | * @var string  | 
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| 34 | */  | 
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| 35 | protected $services;  | 
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| 36 | |||
| 37 | /**  | 
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| 38 | * @var string  | 
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| 39 | */  | 
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| 40 | protected $regexp;  | 
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| 41 | |||
| 42 | /**  | 
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| 43 | * @var string  | 
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| 44 | */  | 
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| 45 | protected $replacement;  | 
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| 46 | |||
| 47 | /**  | 
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| 48 | * NaptrRecord constructor.  | 
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| 49 | *  | 
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| 50 | * @param Node $node  | 
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| 51 | * @param int $ttl  | 
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| 52 | * @param int $order  | 
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| 53 | * @param int $preference  | 
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| 54 | * @param string $flags  | 
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| 55 | * @param string $services  | 
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| 56 | * @param string $regexp  | 
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| 57 | * @param string $replacement  | 
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| 58 | */  | 
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| 59 | public function __construct(Node $node, int $ttl,  | 
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| 71 | |||
| 72 | /**  | 
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| 73 | * @return string  | 
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| 74 | */  | 
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| 75 | public function __toString(): string  | 
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| 87 | |||
| 88 | /**  | 
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| 89 | * @return Int  | 
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| 90 | */  | 
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| 91 | public function getOrder()  | 
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| 95 | |||
| 96 | /**  | 
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| 97 | * @param Int $order  | 
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| 98 | *  | 
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| 99 | * @return Record  | 
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| 100 | */  | 
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| 101 | public function setOrder(Int $order)  | 
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| 105 | |||
| 106 | /**  | 
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| 107 | * @return Int  | 
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| 108 | */  | 
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| 109 | public function getPreference()  | 
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| 113 | |||
| 114 | /**  | 
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| 115 | * @param Int $preference  | 
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| 116 | *  | 
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| 117 | * @return Record  | 
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| 118 | */  | 
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| 119 | public function setPreference(Int $preference)  | 
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| 123 | |||
| 124 | /**  | 
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| 125 | * @return string  | 
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| 126 | */  | 
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| 127 | public function getFlags()  | 
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| 131 | |||
| 132 | /**  | 
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| 133 | * @param string $flags  | 
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| 134 | *  | 
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| 135 | * @return Record  | 
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| 136 | */  | 
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| 137 | public function setFlags(string $flags)  | 
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| 141 | |||
| 142 | /**  | 
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| 143 | * @return string  | 
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| 144 | */  | 
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| 145 | public function getServices()  | 
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| 149 | |||
| 150 | /**  | 
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| 151 | * @param string $services  | 
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| 152 | *  | 
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| 153 | * @return Record  | 
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| 154 | */  | 
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| 155 | public function setServices(string $services)  | 
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| 159 | |||
| 160 | /**  | 
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| 161 | * @return string  | 
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| 162 | */  | 
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| 163 | public function getRegexp()  | 
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| 167 | |||
| 168 | /**  | 
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| 169 | * @param string $regexp  | 
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| 170 | *  | 
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| 171 | * @return Record  | 
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| 172 | */  | 
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| 173 | public function setRegexp(string $regexp)  | 
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| 177 | |||
| 178 | /**  | 
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| 179 | * @return string  | 
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| 180 | */  | 
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| 181 | public function getReplacement()  | 
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| 185 | |||
| 186 | /**  | 
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| 187 | * @param string $replacement  | 
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| 188 | *  | 
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| 189 | * @return Record  | 
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| 190 | */  | 
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| 191 | public function setReplacement(string $replacement)  | 
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| 195 | |||
| 196 | /**  | 
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| 197 | * @return bool  | 
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| 198 | */  | 
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| 199 | View Code Duplication | public function validate(): bool  | 
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| 221 | |||
| 222 | /**  | 
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| 223 | * @return array  | 
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| 224 | */  | 
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| 225 | protected function recordDataToArray(): array  | 
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| 236 | }  | 
            
This check looks for assignments to scalar types that may be of the wrong type.
To ensure the code behaves as expected, it may be a good idea to add an explicit type cast.