Calendar Functions in PHP: Part 5

Introduction

In this tutorial you will learn how to use PHP calendar functions. The PHP calendar functions are used to implement various types of calendar formats. Here I will explain some calendar functions and I am also describing some PHP calendar functions in PART 1 and PART 2.

PHP Calendar JDToJulian function

It converts a Julian day count to Julian calendar date in the from of "Month/Day/Year".

Syntax

jdtojulian (jd)

Parameters in JDToJulian function

It contains one parameter.

Parameter	Description
jd	It specifies Julian day count as integer.

Example of JDToJulian function

<?php

$daycount=juliantojd(12,26,2012);

echo $daycount ."</br>";

$jdday=jdtojulian($daycount);

echo $jdday;

Output

PHP Calendar JDToUnix function

It converts Julian day count to Unix timestamp. Basically this function will return a Unix time stamp corresponding to the given Julian date. This function returns false if the given Julian day count is not in Gregorian date (must be 1970 -2037).

Syntax

jdtounix (jd)

Parameters in JDToUnix function

It contains one parameter.

Parameter	Description
jd	It specifies Julian day count as integer.

Example of JDToUnix function

<?php

$jdays=gregoriantojd(12,26,2012);

$unixtime=jdtounix($jdays);

echo $unixtime;

Output

PHP Calendar JewishToJD function

It converts Jewish calendar to Julian day count and this function can handle dates all the way back to the year 1 (3761 B.C).

Syntax

jewishtojd (month, day, year)

Parameters in JewishToJD function

It has three parameters and all three are required.

Parameter	Description
month	It specifies month number.
day	It specifies day.
year	It specifies year.

Example of JewishToJD function

<?php

$d=jewishtojd(12,26,2012);

echo $d;

Output

PHP Calendar JulianToJD function

It converts a Julian calendar date to Julian day count and the valid range of this function is 4713 B.C to 9999 A.D (according to Julian date).

Syntax

juliantojd (month, day, year)

Parameters in JulianToJD function

It has three parameters and all three are required.

Parameter	Description
month	It specifies month number.
day	It specifies day.
year	It specifies year.

Example of JulianToJD function

<?php

$days=juliantojd(12,26,2012);

echo $days;

Output

PHP Calendar UnixToJD function

It converts Unix timestamp to Julian day count; basically it returns the Julian day for a Unix timestamp (seconds since 1.1.1970).

Syntax

unixtojd (timestamp)

Parameters in UnixToJD function

Contains one parameter and it is an optional parameter..

Parameter	Description
timestamp	It specifies a Unix timestamp.

Example of UnixToJD function

<?php

$d=unixtojd();

echo $d;

Output