php获取前一天后一天,php时间函数操作

 1 <?php
 2 
 3 date_default_timezone_set('PRC'); //默认时区
 4 
 5 echo "今天:",date("Y-m-d",time()),"<br>";
 6 
 7 echo "今天:",date("Y-m-d",strtotime("18 june 2008")),"<br>";
 8 
 9 echo "昨天:",date("Y-m-d",strtotime("-1 day")), "<br>";
10 
11 echo "明天:",date("Y-m-d",strtotime("+1 day")), "<br>";
12 
13 echo "一周后:",date("Y-m-d",strtotime("+1 week")), "<br>";
14 
15 echo "一周零两天四小时两秒后:",date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")), "<br>";
16 
17 echo "下个星期四:",date("Y-m-d",strtotime("next Thursday")), "<br>";
18 
19 echo "上个周一:".date("Y-m-d",strtotime("last Monday"))."<br>";
20 
21 echo "一个月前:".date("Y-m-d",strtotime("last month"))."<br>";
22 
23 echo "一个月后:".date("Y-m-d",strtotime("+1 month"))."<br>";
24 
25 echo "十年后:".date("Y-m-d",strtotime("+10 year"))."<br>";
26 
27 ?>
28 
29 <?php
30 
31 echo (strtotime('2020-5-20′)-strtotime(date(“Y-m-d”)))/86400;
32 
33 ?>