magic_methods.php

<?php
class Test
{
    private $hoge = "hoge";

    public function __get($property)
    {
        if(property_exists($this, $property)) {
            return $this->$property;
        }
    }

    public function __set($property, $value)
    {
        if(property_exists($this, $property)) {
            $this->$property = $value;
        }
        return $this;
    }
}
$obj = new Test();
echo $obj->hoge; #=>hoge