unixtojd() converts a UNIX timestamp to a Julian day count. If no timestamp is given, the function returns the Julian day count for the current timestamp.
As of PHP 4.0.4, this function behaves oddly if given a timestamp less than 0. Filtering the input to ensure that a valid timestamp is being passed to the function is a good idea.
Available in PHP 4.0.0 RC 2
For more information on the UNIX epoch, visit http://www.foldoc.org/ and search for epoch.
To convert a Julian day count to a UNIX timestamp date:
To convert a Julian day count to another calendar system:
See the other jdto*() functions
echo 'The Julian day count for the start of the UNIX epoch is ' . unixtojd (1);
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.