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 UUID extends StringLiteral |
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11 | { |
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12 | /** @var BaseUuid */ |
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13 | protected $value; |
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14 | |||
15 | /** |
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16 | * @param string $uuid |
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17 | * @return UUID |
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18 | * @throws \ValueObjects\Exception\InvalidNativeArgumentException |
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19 | */ |
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20 | 1 | public static function fromNative() |
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27 | |||
28 | /** |
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29 | * Generate a new UUID string |
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30 | * |
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31 | * @return string |
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32 | */ |
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33 | 1 | public static function generateAsString() |
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40 | |||
41 | 28 | public function __construct($value = null) |
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42 | { |
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43 | 28 | $uuid_str = BaseUuid::uuid4(); |
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44 | |||
45 | 28 | if (null !== $value) { |
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46 | 2 | $pattern = '/'.BaseUuid::VALID_PATTERN.'/'; |
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47 | |||
48 | 2 | if (! \preg_match($pattern, $value)) { |
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49 | 1 | throw new InvalidNativeArgumentException($value, array('UUID string')); |
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50 | } |
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51 | |||
52 | 1 | $uuid_str = $value; |
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53 | } |
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54 | |||
55 | 27 | $this->value = \strval($uuid_str); |
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56 | 27 | } |
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57 | |||
58 | /** |
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59 | * Tells whether two UUID are equal by comparing their values |
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60 | * |
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61 | * @param UUID $uuid |
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62 | * @return bool |
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63 | */ |
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64 | 2 | View Code Duplication | public function sameValueAs(ValueObjectInterface $uuid) |
72 | } |
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73 |
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italy
is not defined by the methodfinale(...)
.The most likely cause is that the parameter was removed, but the annotation was not.