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

mktime(hour,minute,second,month,day,year,is_dst)

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 />");
?>

The output of the code above would be:

Jan-05-2002
Feb-01-2002
Jan-01-2001
Jan-01-1999

Complete PHP Date Reference

Jump to: Top of Page or HOME or Printer friendly page

W3Schools provides material for training only. We do not warrant the correctness of its contents. The risk from using it lies entirely with the user. While using this site, you agree to have read and accepted our terms of use and privacy policy.

Copyright 1999-2008 by Refsnes Data. All Rights Reserved.

W3Schools was converted to XHTML in December 1999