PHP introductory tutorial (21) PHP date and time functions

echo time(); // return "1264668961"
?>

2, date()

To convert a UNIX timestamp into a readable current time, use the date() function.

The prototype of the date function is as follows:

echo date("Y/m/d");
echo "";
echo date("Y.m.d");
echo "";
echo date("Y-m-d");
?>

output: 2013/11/21 2013.11.21 2013-11-21

3, mktime() The mktime() function returns the Unix timestamp of a date.

Parameter description:

echo(date("M-d-Y",mktime(0,0,0,12,36,2001)));
echo(date("M-d-Y",mktime(0,0 ,0,14,1,2001)));
echo(date("M-d-Y",mktime(0,0,0,1,1,2001)));
echo(date("M-d-Y",mktime(0 ,0,0,1,1,99)));
?>

output: Jan-05-2002 Feb-01-2002 Jan-01-2001 Jan-01-1999 4.checkdate() The checkdate() function verifies a Gregorian date. The function returns true if the specified value is legal, false otherwise. Dates are legal if: month is between and including 1 - 12 The value of Day is within the range of days that a given month should have, taking leap years into account. year is between and including 1 to 32767 grammar checkdate(month,day,year) parameter

var_dump(checkdate(12,31,2000));
var_dump(checkdate(2,29,2003));
var_dump(checkdate(2,29,2004));
 ?>

output: bool(true) bool(false) bool(true)

>> View more php introductory tutorials