A handy accessor and mutator for storing amounts in cents and accessing and setting them in dollars

amount_in_dollars.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class [Insert Name Here] extends Model
{
    protected $guarded = [];

    function getAmountInDollarsAttribute($dollars)
    {
        return sprintf('$%01.2f', $this->amount_in_cents / 100);
    }

    function setAmountInDollarsAttribute($dollars)
    {
        $dollars = str_replace('$', '', $dollars);

        $this->amount_in_cents = (int) (((float) $dollars) * 100);
    }
}