01.<?php
02. function DateDiff($strDate1,$strDate2)
03. {
04. return (strtotime($strDate2) - strtotime($strDate1))/ ( 60 * 60 * 24 );
05. }
06. function TimeDiff($strTime1,$strTime2)
07. {
08. return (strtotime($strTime2) - strtotime($strTime1))/ ( 60 * 60 );
09. }
10. function DateTimeDiff($strDateTime1,$strDateTime2)
11. {
12. return (strtotime($strDateTime2) - strtotime($strDateTime1))/ ( 60 * 60 );
13. }
14.
15. echo "Date Diff = ".DateDiff("2023-10-18","2024-03-31")."<br>";
16.
17. $total_pen_day1 = DateDiff("2023-10-18","2024-03-31");
18.
19. echo $total_pen_day1."<br>";
20.
21.?>
