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Date and Time : Time and Mktime
time
(PHP 3, PHP 4 )
time -- Return current UNIX timestamp
Description
int time (void)Returns the current time measured in the number of seconds since the Unix Epoch (January 1 1970 00:00:00 GMT).
mktime
(PHP 3, PHP 4 )
mktime -- Get UNIX timestamp for a date
Description
int mktime ( int hour, int minute, int second, int month, int day, int year [, int is_dst])Returns the Unix timestamp corresponding to the arguments given. This timestamp is a long integer containing the number of seconds between the Unix Epoch (January 1 1970) and the time specified.
This 'time' can then be used in conjunction with the date() function to output a date string based on a give time.
Code Examples
mktime() is useful for doing date arithmetic and validation, as it will automatically calculate the correct value for out-of-range input. For example, each of the following lines produces the string "Jan-01-1998".
echo date ("M-d-Y", mktime (0,0,0,12,32,1997));
echo date ("M-d-Y", mktime (0,0,0,13,1,1997));
echo date ("M-d-Y", mktime (0,0,0,1,1,1998));
echo date ("M-d-Y", mktime (0,0,0,1,1,98));
The last day of any given month can be expressed as the "0" day of the next month, not the -1 day. Both of the following examples will produce the string "The last day in Feb 2000 is: 29".
$lastday = mktime (0,0,0,3,0,2000);
echo strftime ("Last day in Feb 2000 is: %d", $lastday);
$lastday = mktime (0,0,0,4,-31,2000);
echo strftime ("Last day in Feb 2000 is: %d", $lastday);
Author: Markavian
Last edited on: 8th Dec, 12:50 am
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