The supplied code with the GregorianToJD function does not work, even with lower case. None of the calendar functions work.

<?php
$jd = GregorianToJD(10,11,1970);
echo("$jd\n");
$gregorian = JDToGregorian($jd);
echo("$gregorian\n");
?>

I get the error :

Fatal error: Call to unsupported or undefined function gregoriantojd() in
/usr/local/src/work/apache_1.3.0/share/htdocs/work/crypt.phtml on line 2

I would really appreciate a response as it is hoding my project up.