- var_dump: documentation ( source)
<?php
if( DateTime::COOKIE === 'd-M-y H:i:s T' )
$cookieString = 'Thursday, 25-Dec-75 14:15:16 EST';
else
$cookieString = 'Thursday, 25-Dec-1975 14:15:16 EST';
var_dump(DateTime::COOKIE === 'd-M-y H:i:s T', DateTime::COOKIE);