Simple example for the Decorator pattern in PHP

decorator_design_pattern.php

<?php

class Transaction
{
    public function execute(callable $operation)
    {
        echo 'Begin Transaction', PHP_EOL;
        $operation();
        echo 'Commit Transaction', PHP_EOL;
    }
}

interface ServiceInterface
{
    public function execute(string $request);
}

class ServiceDecorator implements ServiceInterface
{
    private ServiceInterface $service;
    private Transaction $transaction;

    public function __construct(ServiceInterface $service, Transaction $transaction)
    {
        $this->service = $service;
        $this->transaction = $transaction;
    }

    public function execute(string $request)
    {
        $operation = function () use ($request) {
            $this->service->execute($request);
        };

        $this->transaction->execute($operation->bindTo($this));
    }
}

class Service implements ServiceInterface
{
    public function execute(string $request)
    {
        echo $request, PHP_EOL;
    }
}

//$service = new Service();
$service = new ServiceDecorator(new Service(), new Transaction());
$service->execute('Execute method run lot of code');