|||||| Gregorian Date to Julian Converter

[Gary_Kambic]

Hey everyone,

I need to convert my Gregorian Date to Julian. the following script produces the following date: 2452718

which according to World Date Pages on the web, the correct Julian Date is: 2452840

$a = floor((14-$month)/12);
$y = floor($year+4800-$a);
$m = floor($month+12$a-3);
$datejulian = $day+floor((153m+2)/5)+$y*365;
$datejulian += floor($y/4)-floor($y/100)+floor($y/400)-32045;

When I try to use the function:

$datejulian = GregorianToJD (07,19,2003);
echo "$datejulian\n";
$dategregorian = JDToGregorian ($jd);
echo "$dategregorian\n";

My server returns an error saying it can't find the function. I'm currently using PHP 4.0.6. This will be upgraded at the end of the month to 4.3.2.

Is the server PHP software version the problem?

Thanks much,

Gary

[feldon23]

JDToGregorian and GregorianToJD are in PHP3 and 4 as indicated in the notes, so I'm not sure why it's not working.

Please don't use ||||||. Your questions are not any more or less important than others'.

[Weedpacket]

I get the correct Julian date; the "wrong" Julian date is for the 19th of March, 2003. This is true whether I give a month of 7 or 07 (of course, although 08 and 8 are not the same number.)

So something is telling me your script has slipped by four months somewhere. And looking at the code, I see a spot where you have "m" instead of "$m". My copy of PHP would have complained about that, because its error reporting is turned up high enough, but chances are that yours just silently cast it to 0. That would do it.

As for why the function is undefined, note the installation section in the chapter on Calendar Functions

[Gary_Kambic]

Thanks, it works fine now. It was a typo, "m" instead of $m.

Also, the "||||||" is force of habit when I e-mail people. I'll drop them in the future.

Thanks again,

Gary