trait.php

<?php
trait Accessors
{
    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;
    }
  }
}
class Hoge
{
    use Accessors;

    private $hoge;
}
$obj = new Hoge();
$obj->hoge = "hoge";
echo $obj->hoge; #=>hoge
?>