モデルのインターフェースを定義してみる。 ref: http://qiita.com/items/2389

file0.php

<?php

interface ModelInterface
{
    /**
     * Sets the value of a property.
     * @param string $name
     * @param mixed $value
     * @return void
     */
    public function __set($name, $value);

    /**
     * Gets the value of a property.
     * @param string $name
     * @return mixed
     */
    public function __get($name);

    /**
     * Determines if a variable is set and is not NULL.
     * @param string $name
     * @return bool
     */
    public function __isset($name);

    /**
     * Sets the value of a property.
     * @param string $name
     * @param mixed $value
     * @return ModelInterface
     */
    public function set($name, $value);

    /**
     * Gets the value of a property.
     * @param string $name
     * @return mixed
     */
    public function get($name);

    /**
     * Determines if a variable is set and is not NULL.
     * @param string $name
     * @return bool
     */
    public function defined($name);

    /**
     * Determines if a variable exists.
     * @param string $name
     * @return bool
     */
    public function exists($name);

    /**
     * Imports the values of properties.
     * @param array $values
     * @return ModelInterface
     */
    public function import(array $values);

    /**
     * Exports the values of all properties.
     * @return array
     */
    public function export();
}