03c03-1.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 13 行

<?php
// Let's you know if a certain year is a leap year or not:
function is_leap_year($y) {
	// If the year is divisible by 4 but not by 100 unless by 400
	return ((($y % 4) == 0) && ((($y % 100) != 0) || (($y % 400) == 0)));
}

// Determine for a few years if they are leap years or not:
foreach (range(1999, 2009) as $year) {
	// Output the result:
	echo "<p>{$year} = ", is_leap_year($year) ? 'Leap Year' : 'not', '</p>';
}
?>