<?php ini_set("intl.error_level", E_WARNING); $c = new IntlGregorianCalendar(NULL, 'pt_PT'); var_dump($c->getFirstDayOfWeek(1)); var_dump(intlcal_get_first_day_of_week($c, 1)); var_dump(intlcal_get_first_day_of_week(1));