phpvms/config/phpvms.php

<?php

return [

    /**
     * Pick one of:
     *  dollar, euro, gbp, yen, jpy, rupee, ruble
     */
    'currency' => 'dollar',

    'fuel_types' => [
        '100LL' => 0,
        'JETA' => 1,
        'MOGAS' => 2,
    ],
];