php求闰年算法

php function isLeapYear($year) { if (($year % 4 == 0 && $year % 100 != 0) || $year % 400 == 0) { return true; } else { return false; } } $year = 2024; if (isLeapYear($year)) { echo $year . '年是闰年'; } else { echo $year . '年不是闰年'; }