# PHP mktime() Function

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 Reference

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