PHP code example of phpgears / immutability

1. Go to this page and download the library: Download phpgears/immutability library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

phpgears / immutability example snippets





use Gears\Immutability\ImmutabilityBehaviour;

interface MyInterface extends \Serializable
{
    /**
     * @return string
     */
    public function getParameter(): string;
}

final class MyClass implements MyInterface
{
    use ImmutabilityBehaviour;

    protected function __construct()
    {
        $this->assertImmutable();
    }

    /**
     * Static methods are allowed.
     */
    public static function instance(): self
    {
        return new self();
    }

    /**
     * Method allowed because it's defined in the interface.
     */
    public function getParameter(): string
    {
        return '';
    }

    /**
     * Method allowed because it's defined in the \Serializable.
     */
    public function serialize(): string
    {
        return '';
    }

    /**
     * Method allowed because it's defined in the \Serializable.
     */
    public function unserialize($serialized): void
    {
        $this->assertImmutable();

        // unserialize
    }

    /**
     * {@inheritdoc}
     */
    protected function getAllowedInterfaces(): array
    {
        return [MyInterface::class];
    }
}