$time='2014-11-12';
怎么echo到2014-11-09
<?php$time='2014-11-12';echo date('Y-m-d',strtotime("$time-3 days"));?>
$conn=mysqli_connect('localhost','root','root');$res=mysqli_query($conn,"SELECT ADDDATE('2014-11-12',INTERVAL -3 DAY)");$row=mysqli_fetch_array($res);echo $row[0];2014-11-09
