php gets the start and end timestamps of today, yesterday, last week, and this month

The following is an introduction to the usage of the mktime() function.

PHP mktime() function is used to return the Unix timestamp of a date.

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

Parameter Description hour optional. Specified hours. minute is optional. Specified minutes. second is optional. Specifies seconds. month is optional. Specifies the numeric month. day is optional. Specify days. year is optional. Specified year. On some systems, legal values ​​are between 1901 - 2038. However, this limitation no longer exists in PHP 5. is_dst Optional. Set to 1 if the time is during Daylight Saving Time (DST), 0 otherwise, or -1 if unknown.

Since 5.1.0, the is_dst parameter is deprecated. Therefore the new time zone handling features should be used.

Usage

The argument always represents a GMT date, so is_dst has no effect on the result.

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

Note that before PHP 5.1, if the parameters of this function are illegal, false will be returned.

Note: This function is useful for date operations and validation. It can automatically correct out-of-bounds input, such as: echo(date("M-d-Y",mktime(0,0,0,12,36,2013))); Output result: Jan-05-2014

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