Date

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PHP Date() - Format the Date

The required format parameter in the date() function specifies how to format the date/time.
Here are some characters that can be used:

d - Represents the day of the month (01 to 31)
m - Represents a month (01 to 12)
Y - Represents a year (in four digits)

A list of all the characters that can be used in the format parameter, can be found in our PHP Date reference.
Other characters, like"/", ".", or "-" can also be inserted between the letters to add additional formatting:

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

PHP Date() - Adding a Timestamp

The optional timestamp parameter in the date() function specifies a timestamp. If you do not specify a timestamp, the current date and time will be used.
The mktime() function returns the Unix timestamp for a date.
The Unix timestamp contains the number of seconds between the Unix Epoch (January 1 1970 00:00:00 GMT) and the time specified.

Syntax for mktime()

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

<?php
$tomorrow = mktime(0,0,0,date("m"),date("d")+1,date("Y"));
echo "Tomorrow is ".date("Y/m/d", $tomorrow);
?>

PHP Date / Time Functions

PHP: indicates the earliest version of PHP that supports the function.

Function	Description	PHP
checkdate()	Validates a Gregorian date	3
date_default_timezone_get()	Returns the default time zone	5
date_default_timezone_set()	Sets the default time zone	5
date_sunrise()	Returns the time of sunrise for a given day / location	5
date_sunset()	Returns the time of sunset for a given day / location	5
date()	Formats a local time/date	3
getdate()	Returns an array that contains date and time information for a Unix timestamp	3
gettimeofday()	Returns an array that contains current time information	3
gmdate()	Formats a GMT/UTC date/time	3
gmmktime()	Returns the Unix timestamp for a GMT date	3
gmstrftime()	Formats a GMT/UTC time/date according to locale settings	3
idate()	Formats a local time/date as integer	5
localtime()	Returns an array that contains the time components of a Unix timestamp	4
microtime()	Returns the microseconds for the current time	3
mktime()	Returns the Unix timestamp for a date	3
strftime()	Formats a local time/date according to locale settings	3
strptime()	Parses a time/date generated with strftime()	5
strtotime()	Parses an English textual date or time into a Unix timestamp	3
time()	Returns the current time as a Unix timestamp	3