Definition and Usage
The mktime() function returns the Unix timestamp for a date.This timestamp contains the number of seconds between the Unix Epoch (January 1 1970 00:00:00 GMT) and the time specified.
Syntax
mktime(hour,minute,second,month,day,year,is_dst)
| Parameter | Description |
|---|---|
| hour | Optional. Specifies the hour |
| minute | Optional. Specifies the minute |
| second | Optional. Specifies the second |
| month | Optional. Specifies the numerical month |
| day | Optional. Specifies the day |
| year | Optional. Specifies the year. The valid range for year is on some systems between 1901 and 2038. However this limitation is overcome in PHP 5 |
| is_dst | Optional. Set this parameter to 1 if the time is during daylight savings time (DST), 0 if it is not, or -1 (the default) if it is unknown. If it's unknown, PHP tries to find out itself (which may cause unexpected results). Note: This parameter became deprecated in PHP 5. The new timezone handling features should be used instead. |
Tips and Notes
Note: If the arguments are invalid, the function returns false (PHP versions before 5.1 returns -1).Example
The mktime() function is useful for doing date arithmetic and validation. It will automatically calculate the correct value for out-of-range input:
<?php
echo(date("M-d-Y",mktime(0,0,0,12,36,2001))."<br />");
echo(date("M-d-Y",mktime(0,0,0,14,1,2001))."<br />");
echo(date("M-d-Y",mktime(0,0,0,1,1,2001))."<br />");
echo(date("M-d-Y",mktime(0,0,0,1,1,99))."<br />");
?>
echo(date("M-d-Y",mktime(0,0,0,12,36,2001))."<br />");
echo(date("M-d-Y",mktime(0,0,0,14,1,2001))."<br />");
echo(date("M-d-Y",mktime(0,0,0,1,1,2001))."<br />");
echo(date("M-d-Y",mktime(0,0,0,1,1,99))."<br />");
?>
OUTPUT :
Jan-05-2002
Feb-01-2002
Jan-01-2001
Jan-01-1999
Feb-01-2002
Jan-01-2001
Jan-01-1999