这篇文章主要介绍了php实现的DateDiff和DateAdd时间函数代码分享,DateDiff用来计算两个时间的间隔,DateAdd用来对两个时间进行相加,需要的朋友可以参考下

扩展php中的时间函数DateDiff和DateAdd

1. function DateDiff($part, $begin, $end)
2. {
3. $diff = strtotime($end) - strtotime($begin);
4. switch($part)
5. {
6. case "y": $retval = bcdiv($diff, (60 * 60 * 24 * 365)); break;
7. case "m": $retval = bcdiv($diff, (60 * 60 * 24 * 30)); break;
8. case "w": $retval = bcdiv($diff, (60 * 60 * 24 * 7)); break;
9. case "d": $retval = bcdiv($diff, (60 * 60 * 24)); break;
10. case "h": $retval = bcdiv($diff, (60 * 60)); break;
11. case "n": $retval = bcdiv($diff, 60); break;
12. case "s": $retval = $diff; break;
13. }
14. return $retval;
15. }
16. function DateAdd($part, $number, $date)
17. {
18. $date_array = getdate(strtotime($date));
19. $hor = $date_array["hours"];
20. $min = $date_array["minutes"];
21. $sec = $date_array["seconds"];
22. $mon = $date_array["mon"];
23. $day = $date_array["mday"];
24. $yar = $date_array["year"];
25. switch($part)
26. {
27. case "y": $yar += $number; break;
28. case "q": $mon += ($number * 3); break;
29. case "m": $mon += $number; break;
30. case "w": $day += ($number * 7); break;
31. case "d": $day += $number; break;
32. case "h": $hor += $number; break;
33. case "n": $min += $number; break;
34. case "s": $sec += $number; break;
35. }
36. return date("Y-m-d H:i:s", mktime($hor, $min, $sec, $mon, $day, $yar));
37. }
38. Function DateAdd($part, $n, $date)
39. {
40. switch($part)
41. {
42. case "y": $val = date("Y-m-d H:i:s", strtotime($date ." +$n year")); break;
43. case "m": $val = date("Y-m-d H:i:s", strtotime($date ." +$n month")); break;
44. case "w": $val = date("Y-m-d H:i:s", strtotime($date ." +$n week")); break;
45. case "d": $val = date("Y-m-d H:i:s", strtotime($date ." +$n day")); break;
46. case "h": $val = date("Y-m-d H:i:s", strtotime($date ." +$n hour")); break;
47. case "n": $val = date("Y-m-d H:i:s", strtotime($date ." +$n minute")); break;
48. case "s": $val = date("Y-m-d H:i:s", strtotime($date ." +$n second")); break;
49. }
50. return $val;
51. }