Laracasts Value Object example.

Performance.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Performance extends Model
{
    public function getRevenueAttribute($revenue)
    {
        return new Revenue($revenue);
    }
}

Revenue.php

<?php

namespace App;

class Revenue
{
    private $revenue;

    public function __construct($revenue)
    {
        $this->revenue = $revenue;
    }

    public function inDollars()
    {
        return $this->revenue / 100; // 86
    }

    public function asCurrency()
    {
        return money_format('$%i', $this->inDollars()); // $86.00
    }

    public function __toString()
    {
        return (string) $this->AsCurrency();
    }
}