PHP中对日期加减的类，很不错

PHP中对日期操作的函数功能强大，下面的代码是PHP对日期加减的类，很不错，有需要的朋友可以用一下。
如何使用这个类呢？请看下面的演示：

$temptime

 = time();
echo

 

strftime

( 

"%Hh%M %A %d %b"

,

$temptime

);
$date

 = 

new

 DateAccount();
$temptime

 = 

$date

->DateAdd(

"n"

 ,50,

$temptime

);
echo

 

"<p>"

;
echo

 

strftime

( 

"%Hh%M %A %d %b"

,

$temptime

);

$temptime = time(); echo strftime( "%Hh%M %A %d %b",$temptime); $date = new DateAccount(); $temptime = $date->DateAdd("n" ,50,$temptime); echo "<p>"; echo strftime( "%Hh%M %A %d %b",$temptime);
如果一切顺利，你可以看到以下结果：
15h41 Saturday 03 Jun
16h31 Saturday 03 Jun

$currenttime

 = time();
echo

 

"Current time: "

. 

strftime

(

"%Hh%M %A %d %b"

 ,

$currenttime

).

"<br>"

;
$date

 = 

new

 DateAccount();
$newtime

 = 

$date

->DateAdd (

"n"

,50 ,

$currenttime

);
echo

 

"Time plus 50 minutes: "

. 

strftime

(

"%Hh%M %A %d %b"

 ,

$newtime

).

"<br>"

;
$temptime

 = 

$date

->DateDiff (

"n"

,

$currenttime

 ,

$newtime

);
echo

 

"Interval between two times: "

.

$temptime

;

$currenttime = time(); echo "Current time: ". strftime("%Hh%M %A %d %b" ,$currenttime)."<br>"; $date = new DateAccount(); $newtime = $date->DateAdd ("n",50 ,$currenttime); echo "Time plus 50 minutes: ". strftime("%Hh%M %A %d %b" ,$newtime)."<br>"; $temptime = $date->DateDiff ("n",$currenttime ,$newtime); echo "Interval between two times: ".$temptime;
如果一切顺利，你可以看到以下结果：
Current time: 16h23 Saturday 03 Jun
Time plus 50 minutes: 17h13 Saturday 03 Jun
Interval between two times: 50

<?php
 

class

 DateAccount{
     

function

 __construct(){
     }

     

function

 DateAdd (

$interval

,

$number

, 

$date

) {
        

$date_time_array

 = 

getdate

(

$date

);
        

$hours

 = 

$date_time_array

[

"hours"

];
        

$minutes

 = 

$date_time_array

[

"minutes"

];
        

$seconds

 = 

$date_time_array

[

"seconds"

];
        

$month

 = 

$date_time_array

[

"mon"

];
        

$day

 = 

$date_time_array

[

"mday"

];
        

$year

 = 

$date_time_array

[

"year"

];
        

switch

 (

$interval

) {
          

case

 

"yyyy"

: 

$year

 +=

$number

; 

break

;
          

case

 

"q"

: 

$month

 +=(

$number

*3); 

break

;
          

case

 

"m"

: 

$month

 +=

$number

; 

break

;
          

case

 

"y"

:
          

case

 

"d"

:
          

case

 

"w"

: 

$day

+=

$number

; 

break

;
          

case

 

"ww"

: 

$day

+=(

$number

*7); 

break

;
          

case

 

"h"

: 

$hours

+=

$number

; 

break

;
          

case

 

"n"

: 

$minutes

+=

$number

; 

break

;
          

case

 

"s"

: 

$seconds

+=

$number

; 

break

;
        }
        

$timestamp

 = 

mktime

(

$hours

 ,

$minutes

, 

$seconds

,

$month

 ,

$day

, 

$year

);
        

return

 

$timestamp

;
   }

   

function

 DateDiff (

$interval

,

$date1

,

$date2

) {
        

$timedifference

 = 

$date2

 - 

$date1

;
        

switch

 (

$interval

) {
          

case

 

"w"

: 

$retval

 = 

bcdiv

(

$timedifference

 ,604800); 

break

;
          

case

 

"d"

: 

$retval

 = 

bcdiv

( 

$timedifference

,86400); 

break

;
          

case

 

"h"

: 

$retval

 = 

bcdiv

 (

$timedifference

,3600); 

break

;
          

case

 

"n"

: 

$retval

 = 

bcdiv

( 

$timedifference

,60); 

break

;
          

case

 

"s"

: 

$retval

 = 

$timedifference

; 

break

;
        }
        

return

 

$retval

;
    }
 }
?>