php如何获取两个日期之间的间隔天数

Answer 1

<?php
$datetime1 = date_create('2009-10-11');
$datetime2 = date_create('2009-10-13');
$interval = date_diff($datetime1, $datetime2);
echo $interval->format('%R%a days');
?>
$interval
是个DateInterval对象

http://php.net/manual/en/class.dateinterval.php