The unixtojd() function converts Unix timestamp to Julian Day Count.
PHP unixtojd() Function has the following syntax.
unixtojd(timestamp);
PHP unixtojd() Function returns the Julian Day number for a Unix timestamp (seconds since 1.1.1970), or for the current day if no timestamp is given.
Convert Unix timestamp to Julian Day Count
<?php
echo unixtojd();
?>
The code above generates the following result.