Online PHP editor | refs for i4I05

<?php define("CURRENCY_LOOKUP", [ 'AUD' => 'Australian Dollar', 'USD' => 'US Dollar', 'GBP' => 'Pound Sterling', 'EUR' => 'Euro', ]); $currency['title'] = 'JPY'; echo CURRENCY_LOOKUP[$currency['title']] ?? $currency['title']; echo "\n---\n"; $currency['title'] = 'GBP'; echo CURRENCY_LOOKUP[$currency['title']] ?? $currency['title'];