PHP mktime () function

Definition and usage

The Mktime () function returns a Unix timestamp for a date.

The parameter always represents the GMT date, so IS_DST has no effect on the result.

Parameters can be left-to-right and empty, and empty parameters will be set to the corresponding current GMT value.

Grammar

Mktime (HOUR,MINUTE,SECOND,MONTH,DAY,YEAR,IS_DST)

Parameter description

Hour	Optional. Specified hours.
Minute	Optional. Specify minutes.
Second	Optional. Specify seconds.
Month	Optional. Specifies the number of months to be represented.
Day	Optional. Prescribed days.
Year	Optional. Prescribed year. On some systems, the legal value is between 1901-2038. However, there is no such limit in PHP 5.
Is_dst	Optional. If the time is in daylight saving time (DST), set to 1, otherwise set to 0 and if unknown, set to-1. Since 5.1.0, the IS_DST parameter has been discarded. Therefore, you should use the new Time zone processing feature.

Hints and Notes

Note: Before PHP 5.1, if the parameter of the function is illegal, it will return false.

Example

The Mktime () function is useful for date arithmetic and validation. It can automatically correct out-of-bounds input:

Output:

jan-05-2002feb-01-2002jan-01-2001jan-01-1999

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