Person.php

<?php
namespace MyProject;

class Person
{

    private $data;
    
    /**
     * 
     *  [
     *      'id' => <id>,
     *      'name' => 'name',
     *      'insertDate' => '2014-04-17 15:53:00'
     *  ]
     * 
     * @param array $data
     **/
    public function __construct(array $data)
    {
        $this->data = $data;
    }
    
    /**
     * @return string
     **/
    public function getInsertTime()
    {
        return strtotime($this->data['insertDate']);
    }



    /**
     * __get 
     * 
     * @param mixed string
     * @access public
     * @return mixed
     */
    public function __get($name)
    {
        static $forbidden = array('insertDate');
        
        if (array_key_exists($name, $this->data) && !in_array($name, $forbidden)) {
            switch ($name) {
                case 'insertTime':
                    $ret = $this->getInsertTime();
                    break;
                default:
                    $ret = $this->data[$name];
                    break;
            }
        } else {
            throw new \DomainException("No such key: `$name`");
        }
        
        return $ret;
    }

}

PersonController.php

<?php

namespace MyProject;

class PersonController {
    
    /**
     * @var MyProject\PersonRepository
     */
    protected $repository;
    
    public function __construct(PersonRepository $repository)
    {
        $this->repository = $repository;
    }
    
    
    public function show($id)
    {
        if(!$person = $this->repository->findById($id)) doSome404Function();
        var_dump($person);
    }
    
    public function create()
    {
        // DO NOT ACTUALLY DO THIS, JUST AN EXAMPLE
        $input = $_POST;
        $person = $this->repository->create($input);
        return true;
    }
    
}

PersonRepository.php

<?php

namespace MyProject;

use Person as Entity;

class PersonRepository {
    
    public function make(array $data = array())
    {
        return new Entity($data);
    }
    
    public function findById($id)
    {
        // Do pdo / sql query to find a version of a person based on $id
        $data = $resultOfQuery;
        return $data ? $this->make($data) : false;
    }
    
    public function save(Entity $entity)
    {
        // Do pdo / sql query to persist $entity to the database
        // You should throw an exception here if it fails
        return $entity;
    }
    
    public function create(array $data = array())
    {
        return $this->save($this->make($data));
    }
    
    public function delete(Entity $entity)
    {
        // Do pdo / sql query to delete $entity
    }
    
}