--TEST-- Test strftime() function : usage variation - Checking week related formats which was not supported on Windows before VC14. --FILE-- "%V", 'Weekday as decimal' => "%u", ); // loop through each element of the array for timestamp foreach($inputs as $key =>$value) { echo "\n--$key--\n"; var_dump( strftime($value) ); var_dump( strftime($value, $timestamp) ); } ?> --EXPECTF-- *** Testing strftime() : usage variation *** --The ISO 8601:1988 week number-- string(2) "%d" string(2) "32" --Weekday as decimal-- string(1) "%d" string(1) "5"