How does the "clone" command in PHP help in improving script performance when dealing with object instances?

When dealing with object instances in PHP, directly assigning one object to another creates a reference, meaning any changes made to one object will affect the other. This can lead to unintended side effects and performance issues. To avoid this, the "clone" command in PHP can be used to create a copy of an object without creating a reference, improving script performance by ensuring each object instance is independent. 

class MyClass {
    public $data;

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

$originalObject = new MyClass("original data");
$clonedObject = clone $originalObject;

$originalObject->data = "modified data";

echo $originalObject->data; // Output: modified data
echo $clonedObject->data; // Output: original data

Keywords

clone PHP object instances script performance optimization

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