Stripe amount to standard Currency + Amount and vice-versa

stripe_amount_helpers.php

<?php

// This function converts a normal currency amount to a Stripe-compatible amount.
// To be used on creating Stripe Checkout Stations
// e.g. USD 10.00 to 1000

if (! function_exists('convert_normal_to_stripe_amount')) {
    function convert_normal_to_stripe_amount($currency, $amount)
    {
        $stripe_amount = $amount;
        $currency = strtolower(trim($currency));

        if (in_array($currency, ['bif', 'clp', 'djf', 'gnf', 'jpy', 'kmf', 'krw'])) {
            $stripe_amount = number_format(ceil($stripe_amount), 0, '', '');
        } else {
            $stripe_amount = number_format(($stripe_amount * 100), 0, '', '');
        }

        return $stripe_amount;
    }
}

// This function converts Stripe amounts back to normal currency amounts.
// To be used on parsing Stripe Webhooks
// e.g. 1000 to 10.00

function convert_stripe_to_normal_amount($currency, $stripe_amount)
{
    $amount = $stripe_amount;
    $currency = strtolower(trim($currency));

    if (in_array($currency, ['bif', 'clp', 'djf', 'gnf', 'jpy', 'kmf', 'krw'])) {
        $amount = number_format((float) $amount, 0, '.', '');
    } else {
        $amount = number_format((float) $amount / 100, 2, '.', '');
    }

    return $amount;
}