php时间计算

<?php//PHP计算两个时间差的方法 $startdate="2010-10-31:40:00";$enddate="2016-10-31:45:09";$date=floor((strtotime($enddate)-strtotime($startdate))/86400);$hour=floor((strtotime($enddate)-strtotime($startdate))%86400/3600);$minute=floor((strtotime($enddate)-strtotime($startdate))%86400/60);$second=floor((strtotime($enddate)-strtotime($startdate))%86400%60);echo $date."天<br>";echo $hour."小时<br>";echo $minute."分钟<br>";echo $second."秒<br>";?>