Calendar Function in PHP: Part 1

Introduction

The PHP Calendar functions are for working with various calendar formats. Basically the calendar formats are based on Julian dates. Here I am going to explain some of PHP calendar functions.

PHP cal_days_in_month function

This function returns the number of days in a month of a given year and calendar.

Syntax

cal_days_in_month (calendar, month, year)

Parameters in cal_days_in_month function

It has three parameters and every parameter is required in this function.

Parameter	Description
calendar	It specifies which type of calendar.
month	It specifies month number.
year	It specifies year.

Example of cal_days_month function:

<?php

$daysval=cal_days_in_month(CAL_GREGORIAN,2,2016);

echo("The $daysval days will be in Feb 2016");
?>

Output

PHP cal_from_jd function

It converts the given Julian day into date of the given calendar.

Syntax

cal_from_jd (jday, calendar)

Parameters in cal_from_jd function

It have two parameters and every parameter is required in this function.

Parameter	Description
calendar	It specifies which type of calendar.
jday	It is used for count Julian days.

Example of cal_from_jd function:

<?php

$d=unixtojd(mktime(0,0,0,1,10,2005));

echo"<pre>";

print_r (cal_from_jd($d,CAL_GREGORIAN));
?>

Output

PHP cal_info function

It returns the array that contains information about a given calendar.

Syntax

cal_info (calendar)

Parameters of the cal_info function

It has only one parameter.

Parameter	Description
calendar	It specifies which type of calendar. In it 0 defines CAL_GREGORIAN. 1 defines CAL_JULIAN. 2 defines CAL_French.

Example of cal_info function:

<?php
$calinfo=cal_info(0);
echo"<pre>";
print_r($calinfo);
?>

Output