- var_dump: documentation ( source)
<?php
$intlDateFormatter = new IntlDateFormatter('it', 2, -1, 'Europe/Rome', 1, 'dd/MM/yyyy');
$intlDateFormatter->setLenient(false);
$date = '28/05/1972';
// $intlDateFormatter->setLenient(true);
$res = $intlDateFormatter->parse($date);
var_dump($intlDateFormatter->getErrorMessage());