Online PHP editor | refs for TmmUi

<?php $domain_markets = [ 'AU' => 'sensasiaweb.itravelsoftware.com', 'UK' => 'sensasiaweb.itravelsoftware.com', 'US' => 'sensasiaweb.itravelsoftware.com', 'ES' => 'sensasiaweb.itravelsoftware.com', 'DE' => 'sensasiaweb-de.itravelsoftware.com', 'FR' => 'sensasiaweb-fr.itravelsoftware.com' ]; var_dump(array_keys($domain_markets), 'sensasiaweb.itravelsoftware.com', true);