How to implement the Prototype design pattern in PHP for cloning objects?

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by gilbert , in category: PHP General , 2 years ago

How to implement the Prototype design pattern in PHP for cloning objects?

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1 answer

by scotty_walker , 2 years ago

@gilbert 

To implement the Prototype design pattern in PHP, you can follow these steps:

  1. Create an abstract class or interface for the prototype, which defines the methods that will be used for cloning.
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abstract class Prototype
{
    abstract public function clone();
}


  1. Create a concrete class that extends the prototype and implements the clone method. This class will define the default values for the object's properties.
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class ConcretePrototype extends Prototype
{
    private $property;

    public function __construct($property)
    {
        $this->property = $property;
    }

    public function clone()
    {
        return new ConcretePrototype($this->property);
    }
}


  1. Create a client class that uses the prototype to create new objects by cloning.
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class Client
{
    private $prototype;

    public function __construct(Prototype $prototype)
    {
        $this->prototype = $prototype;
    }

    public function createObject()
    {
        return $this->prototype->clone();
    }
}


  1. To use the Prototype pattern, create an instance of the client class and pass it a prototype object. Then use the createObject method to create new objects by cloning the prototype.
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$prototype = new ConcretePrototype('default value');
$client = new Client($prototype);

$newObject = $client->createObject();


In this example, $newObject will be a new instance of the ConcretePrototype class, with the same property value as the original prototype. You can then modify the new object's properties without affecting the original prototype.

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