THE WORLD'S LARGEST WEB DEVELOPER SITE

PHP Tutorial

PHP HOME PHP Intro PHP Install PHP Syntax PHP Comments PHP Variables PHP Echo / Print PHP Data Types PHP Strings PHP Numbers PHP Constants PHP Operators PHP If...Else...Elseif PHP Switch PHP While Loops PHP For Loops PHP Functions PHP Arrays PHP Superglobals

PHP Forms

PHP Form Handling PHP Form Validation PHP Form Required PHP Form URL/E-mail PHP Form Complete

PHP Advanced

PHP Date and Time PHP Include PHP File Handling PHP File Open/Read PHP File Create/Write PHP File Upload PHP Cookies PHP Sessions PHP Filters PHP Filters Advanced PHP JSON

PHP OOP

PHP What is OOP PHP Classes/Objects PHP Constructor PHP Destructor PHP Access Modifiers PHP Inheritance PHP Constants PHP Abstract Classes PHP Traits PHP Static Methods PHP Static Properties

MySQL Database

MySQL Database MySQL Connect MySQL Create DB MySQL Create Table MySQL Insert Data MySQL Get Last ID MySQL Insert Multiple MySQL Prepared MySQL Select Data MySQL Delete Data MySQL Update Data MySQL Limit Data

PHP XML

PHP XML Parsers PHP SimpleXML Parser PHP SimpleXML - Get PHP XML Expat PHP XML DOM

PHP - AJAX

AJAX Intro AJAX PHP AJAX Database AJAX XML AJAX Live Search AJAX Poll

PHP Examples

PHP Examples PHP Quiz PHP Exercises PHP Certificate

PHP Reference

PHP Overview PHP Array PHP Calendar PHP Date PHP Directory PHP Error PHP Filesystem PHP Filter PHP FTP PHP JSON PHP Libxml PHP Mail PHP Math PHP Misc PHP MySQLi PHP Network PHP SimpleXML PHP Stream PHP String PHP XML Parser PHP Zip PHP Timezones

PHP jdtounix() Function

❮ PHP Calendar Reference

Example

Convert a Gregorian date to a Julian Day Count; then convert the Julian Day Count to Unix timestamp:

<?php
$jd=gregoriantojd(10,3,1975);
echo jdtounix($jd);
?>
Run Example »

Definition and Usage

The jdtounix() function converts Julian Day Count to Unix timestamp.

Note: This function will return false if the parameter jd is not inside the Unix epoch (which means that the Gregorian years must be between 1970 and 2037 OR that jd >= 2440588 and jd <= 2465342). The time returned is local time.

Tip: Look at the unixtojd() function to convert Unix timestamp to Julian Day Count.


Syntax

jdtounix(jd);

Parameter Values

Parameter Description
jd Required. A Julian Day number between 2440588 and 2465342


Technical Details

Return Value: Returns the Unix timestamp for the start of the specified Julian day
PHP Version: 4+

❮ PHP Calendar Reference