In PHP, how do I deep copy objects for production systems?

In PHP, deep copying objects can be achieved using various methods. One common method is utilizing the `clone` keyword, but this only creates a shallow copy. For deep copying, you'll often need to implement a custom method to ensure that all nested objects are also copied.

Using serialization is a straightforward way to deep copy an object, as it allows you to preserve the state of the entire object structure. Below is an example demonstrating how to perform a deep copy using serialization.


    <?php
    class Address {
        public $street;
        public $city;

        public function __construct($street, $city) {
            $this->street = $street;
            $this->city = $city;
        }
    }

    class User {
        public $name;
        public $address;

        public function __construct($name, Address $address) {
            $this->name = $name;
            $this->address = $address;
        }
    }

    function deepCopy($object) {
        return unserialize(serialize($object));
    }

    // Creating an original user object
    $originalUser = new User("John Doe", new Address("123 Main St", "Anytown"));

    // Creating a deep copy of the user
    $copiedUser = deepCopy($originalUser);

    // Modify the copied user address
    $copiedUser->address->street = "456 Elm St";

    echo $originalUser->address->street; // Outputs: 123 Main St
    echo $copiedUser->address->street;    // Outputs: 456 Elm St
    ?>

In PHP, how do I deep copy objects for production systems?

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In PHP, how do I deep copy objects for production systems?

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