Helper function for cloning objects

Function Kenny1911\CloneWith\clone_with can set values of properties during the cloning process.

In future versions of php, there may be a clone with construct that will solve the same problem.

Usage

use function Kenny1911\CloneWith\clone_with;

class Post
{
    /** @var string */
    private $title;
    
    /** @var string */
    private $author;
    
    public function __construct(string $title, string $author)
    {
        $this->title = $title;
        $this->author = $author;
    }
    
    public function getTitle(): string
    {
        return $this->title;
    }
    
    public function getAuthor(): string
    {
        return $this->author;
    }
}

$post = new Post('Foo', 'Author');

$post2 = clone_with($post, ['title' => 'Bar']);

echo $post2->getTitle(); // Bar

Cloning PHP 8.1 readonly properties

Readonly properties appeared in PHP 8.1.

It values cannot be changed, if use standard way to cloning objects (using clone operator).

Function clone_with supports override values of readonly object properties.

Support classes with __clone() method

Classes can has __clone() method, that contains additional logic of cloning object instance.

Function clone_with supports it and clone logic will not be violated.

Alternatives

• spatie/php-cloneable - A Cloneable trait that allows you to clone readonly properties in PHP 8.1.