DesignPatternsPHP/Structural/Proxy/RecordProxy.php

<?php

namespace DesignPatterns\Structural\Proxy;

/**
 * Class RecordProxy.
 */
class RecordProxy extends Record
{
    /**
     * @var bool
     */
    protected $isDirty = false;

    /**
     * @var bool
     */
    protected $isInitialized = false;

    /**
     * @param array $data
     */
    public function __construct($data)
    {
        parent::__construct($data);

        // when the record has data, mark it as initialized
        // since Record will hold our business logic, we don't want to
        // implement this behaviour there, but instead in a new proxy class
        // that extends the Record class
        if (null !== $data) {
            $this->isInitialized = true;
            $this->isDirty = true;
        }
    }

    /**
     * magic setter.
     *
     * @param string $name
     * @param mixed  $value
     *
     * @return void
     */
    public function __set($name, $value)
    {
        $this->isDirty = true;
        parent::__set($name, $value);
    }
}