Maximum time() | PHP

Question

It\'s kind of a silly question, but what would be the maximum INT value of a time() and it\'s future date, e.g.

1st January 2999

Answer 1

PHP stores the highest integer number it can represent in the PHP_INT_MAX constant:

date('Y-m-d H:i:s', PHP_INT_MAX); // 2038-01-19 04:14:07

If you want to work with dates beyond that, consider using the DateTime API, e.g.

$dt = new DateTime('1st January 2999');
$dt->add(DateInterval::createFromDateString('+1 day'));
echo $dt->format('Y-m-d H:i:s'); // 2999-01-02 00:00:00
echo $dt->format('U');           // 32472226800