- var_dump: documentation ( source)
- date: documentation ( source)
<?php
function is_leap_year(int $year) :bool {
return $year % 4 == 0 and ($year % 100 != 0 or $year % 400 == 0);
}
$year = 2016;
var_dump(is_leap_year($year)); # true
var_dump( (bool) date('L', $year));
$year = 2018;
var_dump(is_leap_year($year) === date('L', $year)); # false
var_dump( (bool) date('L', $year));