php日期实例：取得上周，本周，上月，本月，本季度，上季度

例子，php获取上周，本周，上月，本月，本季度，上季度。

2. date_default_timezone_set('PRC');
3. date("Y-m-d H:i:s", strtotime(" +2 year"));
4. date("Y-m-d H:i:s", strtotime(" +2 month"));
5. date("Y-m-d H:i:s", strtotime(" +2 week"));
6. date("Y-m-d H:i:s", strtotime(" +2 day"));
7. date("Y-m-d H:i:s", strtotime(" +2 hour"));
8. date("Y-m-d H:i:s", strtotime(" +2 minute"));
9. date("Y-m-d H:i:s", strtotime(" +2 second"));
11. echo date("Ymd",strtotime("now")), "\n";
12. echo date("Ymd",strtotime("-1 week Monday")), "\n";
13. echo date("Ymd",strtotime("-1 week Sunday")), "\n";
14. echo date("Ymd",strtotime("+0 week Monday")), "\n";
15. echo date("Ymd",strtotime("+0 week Sunday")), "\n";
17. echo "*********第几个月:";
18. echo date('n');
19. echo "*********本周周几:";
20. echo date("w");
21. echo "*********本月天数:";
22. echo date("t");
23. echo "*********";
25. echo '
    上周:
    ';
26. echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),date("d")-date("w")+1-7,date("Y"))),"\n";
27. echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7-7,date("Y"))),"\n";
28. echo '
    本周:
    ';
29. echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),date("d")-date("w")+1,date("Y"))),"\n";
30. echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7,date("Y"))),"\n";
32. echo '
    上月:
    ';
33. echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m")-1,1,date("Y"))),"\n";
34. echo date("Y-m-d H:i:s",mktime(23,59,59,date("m") ,0,date("Y"))),"\n";
35. echo '
    本月:
    ';
36. echo date("Y-m-d H:i:s",mktime(0, 0 , 0,date("m"),1,date("Y"))),"\n";
37. echo date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("t"),date("Y"))),"\n";
39. $season = ceil((date('n'))/3);//当月是第几季度
41. echo '
    本季度:
    ';
42. echo date('Y-m-d H:i:s', mktime(0, 0, 0,$season*3-3+1,1,date('Y'))),"\n";
43. echo date('Y-m-d H:i:s', mktime(23,59,59,$season*3,date('t',mktime(0, 0 , 0,$season*3,1,date("Y"))),date('Y'))),"\n";
45. $season = ceil((date('n'))/3)-1;//上季度是第几季度
47. echo '
    上季度:
    ';
48. echo date('Y-m-d H:i:s', mktime(0, 0, 0,$season*3-3+1,1,date('Y'))),"\n";
49. echo date('Y-m-d H:i:s', mktime(23,59,59,$season*3,date('t',mktime(0, 0 , 0,$season*3,1,date("Y"))),date('Y'))),"\n";
50. ?>

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