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Summary of commonly used PHP date functions

WBOY
WBOYOriginal
2016-07-25 08:45:09889browse

Summary of commonly used date functions in PHP: including checking whether the date format is legal, checking whether the time is legal, time comparison functions, and returning seconds, minutes, hours or days between two dates.

  1. function check_date($date) { //Check whether the date is a legal date
  2. $dateArr = explode("-", $date);
  3. if (is_numeric($dateArr[0]) && is_numeric ($dateArr[1]) && is_numeric($dateArr[2])) {
  4. return checkdate($dateArr[1],$dateArr[2],$dateArr[0]);
  5. }
  6. return false;
  7. }
  8. function check_time($time) { //Check whether the time is legal time
  9. $timeArr = explode(":", $time);
  10. if (is_numeric($timeArr[0]) && is_numeric($timeArr[1]) && is_numeric ($timeArr[2])) {
  11. if (($timeArr[0] >= 0 && $timeArr[0] <= 23) && ($timeArr[1] >= 0 && $timeArr[1] <= 59) && ($timeArr[2] >= 0 && $timeArr[2] <= 59))
  12. return true;
  13. else
  14. return false;
  15. }
  16. return false;
  17. }
  19. function DateDiff ($date1, $date2, $unit = "") { //Time comparison function, returns the seconds, minutes, hours or days between two dates
  20. switch ($unit) {
  21. case 's':
  22. $dividend = 1;
  23. break;
  24. case 'i':
  25. $dividend = 60;
  26. break;
  27. case 'h':
  28. $dividend = 3600;
  29. break;
  30. case 'd':
  31. $dividend = 86400;
  32. break;
  33. default:
  34. $dividend = 86400;
  35. }
  36. $time1 = strtotime($date1);
  37. $time2 = strtotime($date2);
  38. if ($time1 && $time2) //OSPHP.COM.Cn Open source
  39. return (float)($time1 - $time2) / $dividend;
  40. return false;
  41. }
  43. ?>
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