PHP之两个日期之间相差天数

利用日期时间对象中的方法

$start_date = "2018-05-25";
$end_date = "2017-05-23";
 
$datetime_start = new DateTime($start_date);
$datetime_end = new DateTime($end_date);
$days = $datetime_start->diff($datetime_end)->days;
echo "时间差是:$days";