PHP mktime() Function
 Complete PHP Date Reference
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
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mktime(hour,minute,second,month,day,year,is_dst)
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| 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 />");
?>
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The output of the code above would be:
Jan-05-2002
Feb-01-2002
Jan-01-2001
Jan-01-1999
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Complete PHP Date Reference
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