PHP mktime() Function

PHP Date/Time PHP Date/Time Reference

Example

Return the Unix timestamp for a date. Then use it to find the day of that date:

<?php
// Prints: October 3, 1975 was on a Friday
echo "Oct 3, 1975 was on a ".date("l", mktime(0,0,0,10,3,1975));
?>

Run example »

Definition and Usage

The gmmktime() function returns the Unix timestamp for a date.

Tip: This function is identical to gmmktime() except the passed parameters represents a date (not a GMT date).


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 month
day Optional. Specifies the day
year Optional. Specifies the year
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 5.1.0. The new timezone handling features should be used instead

Technical Details

Return Value: Returns an integer Unix timestamp. FALSE on error
PHP Version: 4+
Changelog: PHP 5.3.0: Throws E_DEPRECATED if the is_dst parameter is used
PHP 5.1.0: The is_dst parameter was deprecated. If mktime() is called with no arguments, it now throws E_STRICT notice. Use the time() function instead.

PHP Date/Time PHP Date/Time Reference

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