PHP Date Functions

PHP Date Functions

PHP Date Functions :

The php date() function is used to format a time and/or date.

Date(format [,timestamp])

Where format argument is mandatory and it specifies the format of the timestamp.timestamp attribute is optional ,specifies a timestamp . default is the timestamp of current date and time.

Timestamp is the number of seconds from 1970 jan 1^st onwards.

Different formats used for date and time :

    D – day of the week {mon,tue,wed,…etc}

 d- the day of the month(01-31)

m – the current month , as a number(01-12)

M – {jan,feb,mar,,,,,,,,,,,}

y- the current year in 4 digits.

H – hours

i-                    Minuts

s- seconds

S – suffix to date like rd,th,st,nd etc… characters like “/”,”.”,or “-“ can be inserted between the letters to add formatting .

Time() – is a built-in function of php used for getting the seconds from 1970 jan 1^st onwards(getting current timestamp) to get the timezone , open php.ini and set as date.timezone = asia/calcutta.

Strtotime(date in string) – function is used to convert a date in string format to timestamp(corresponding number of seconds from 1970 jan 1^st).

<?php

 $d = date("1,ds-M-y::H:i:s");

 echo $d."<br>";

 $t = time();

 echo $t."seconds from 1970 jan 1st <br>";

 $d = date("1,ds-M-y::H:i:s",366);

 echo $d."<br>";

 $d1 = date("y-m-d");

 //var_dump($sal);

 $d2 = "2011-09-21";

 $diff = (strtotime($d1)-  strtotime($d2))/(60*60*24);

 echo "days difference=".$diff ;

?>