What is use of mktime function?

The mktime() function is an inbuilt function in PHP which is used to return the Unix timestamp for a date. The hour, minute, second, month, day and year are sent as parameters to the mktime() function and it returns an integer Unix timestamp on success and False on error.

What is the difference between time () method and Mktime () method?

The time() function returns the current time. The main function of the mktime() function is not to return the current time, but to format the time. The mktime() function returns an Unix timestamp of 1 date. …

What does mktime return?

The mktime() function returns Universal Coordinate Time (UTC) having type time_t. The value (time_t)(-1) is returned if the Universal Coordinate Time cannot be represented.

How does Mktime work?

The mktime() function converts a broken-down time structure, expressed as local time, to calendar time representation. The function ignores the values supplied by the caller in the tm_wday and tm_yday fields.

When does the mktime function return a calendar time?

The mktime function returns a calendar time that describes a broken-down local time pointed to by timeptr. If there is an error, the mktime function will return -1.

How to use the mktime function in PHP?

PHP mktime () Function 1 Definition and Usage. The gmmktime () function returns the Unix timestamp for a date. Tip: This function is identical to… 2 Syntax. 3 Parameter Values. Set this parameter to 1 if the time is during daylight savings time (DST), 0 if it is not, or -1 (the… More

How does mktime ( ) work in Linux man?

The mktime () function converts a broken-down time structure, expressed as local time, to calendar time representation. The function ignores the values supplied by the caller in the tm_wday and tm_yday fields.

When does mktime return an undefined value?

Some times are invalid if DST is enabled on the system PHP is running on or is_dst is set to 1. If DST is enabled in e.g. 2:00, all times between 2:00 and 3:00 are invalid and mktime () returns an undefined (usually negative) value.