Online PHP editor | refs for nYJ2R

<?php var_dump(count(\DateTimeZone::listIdentifiers())); var_dump(count(timezone_identifiers_list())); $zonelist = timezone_identifiers_list(); $zones = array(); foreach ($zonelist as $zone) { if (preg_match('!^((Africa|America|Antarctica|Arctic|Asia|Atlantic|Australia|Europe|Indian|Pacific)/|UTC$)!', $zone)) { $zones[$zone] = $zone; } } var_dump(count($zones));