- var_dump: documentation ( source)
- mktime: documentation ( source)
- date: documentation ( source)
<?php
var_dump(
mktime(PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX),
date('Y-m-d H:i:s', mktime(PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX, PHP_INT_MAX))
);