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 AudienceRestriction extends AbstractCondition |
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| 19 | { |
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| 20 | /** |
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| 21 | * @var string[] |
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| 22 | */ |
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| 23 | protected $audience = array(); |
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| 24 | |||
| 25 | /** |
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| 26 | * @param string|string[] $audience |
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| 27 | */ |
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| 28 | 15 | public function __construct($audience = array()) |
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| 35 | |||
| 36 | /** |
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| 37 | * @param string $audience |
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| 38 | * |
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| 39 | * @return AudienceRestriction |
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| 40 | */ |
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| 41 | 6 | public function addAudience($audience) |
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| 47 | |||
| 48 | /** |
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| 49 | * @return string[] |
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| 50 | */ |
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| 51 | 7 | public function getAllAudience() |
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| 55 | |||
| 56 | /** |
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| 57 | * @param string $value |
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| 58 | * |
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| 59 | * @return bool |
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| 60 | */ |
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| 61 | 2 | public function hasAudience($value) |
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| 73 | |||
| 74 | /** |
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| 75 | * @param \DOMNode $parent |
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| 76 | * @param SerializationContext $context |
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| 77 | */ |
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| 78 | 4 | public function serialize(\DOMNode $parent, SerializationContext $context) |
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| 84 | |||
| 85 | /** |
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| 86 | * @param \DOMNode $node |
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| 87 | * @param DeserializationContext $context |
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| 88 | */ |
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| 89 | 3 | View Code Duplication | public function deserialize(\DOMNode $node, DeserializationContext $context) |
| 96 | } |
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| 97 |
When comparing two booleans, it is generally considered safer to use the strict comparison operator.