| 1 | <?php  | 
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| 23 | class PublishedPost extends AggregateRoot implements ReadModelInterface  | 
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| 24 | { | 
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| 25 | /**  | 
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| 26 | * Post constructor.  | 
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| 27 | *  | 
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| 28 | * @param PostId $id  | 
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| 29 | * @param string $title  | 
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| 30 | */  | 
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| 31 | public function __construct(PostId $id, $title)  | 
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| 37 | |||
| 38 | /**  | 
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| 39 | * @return string  | 
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| 40 | */  | 
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| 41 | public function title()  | 
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| 45 | |||
| 46 | /**  | 
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| 47 | * @param string $title  | 
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| 48 | */  | 
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| 49 | public function setTitle($title)  | 
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| 53 | }  | 
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| 54 | 
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: