1 | <?php |
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7 | trait UuidTrait |
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8 | { |
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9 | /** |
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10 | * @var string Primary key UUID |
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11 | * |
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12 | * @ORM\Id |
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13 | * @ORM\Column(type="string") |
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14 | * @ORM\GeneratedValue(strategy="UUID") |
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15 | */ |
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16 | protected $id; |
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17 | |||
18 | /** |
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19 | * Return primary key UUID identifier. |
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20 | * |
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21 | * @return string Primary key UUID |
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22 | */ |
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23 | public function getId() |
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27 | |||
28 | /** |
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29 | * Sets primary key UUID identifier. |
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30 | * |
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31 | * @param string $id Primary key UUID |
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32 | * |
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33 | * @return UuidTrait |
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34 | */ |
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35 | public function setId($id) |
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41 | } |
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42 |
In PHP traits cannot be used for type-hinting as they do not define a well-defined structure. This is because any class that uses a trait can rename that trait’s methods.
If you would like to return an object that has a guaranteed set of methods, you could create a companion interface that lists these methods explicitly.