Dear mr. Maas, First of all my appologies for taking so long to respond. I had a family death to attend to. I will respond to the message in message. Yours, Kevin "Jochem Maas" <jochem@xxxxxxxxxxxxx> wrote in message news:422F5C9C.2050701@xxxxxxxxxxxxxxxx > ... > >> > >>Why re-invent the wheel? > > > > > > It's part of a game. In the RPG there are dates which the players would like > > to be able to convert from our calendar to that one, and back again.. > > > > > >>>In order to do that I need to find the exact days since the year 0 > > > > BC/AD. > > why is OBC relevant, I read later on that you take the start of egyptian > civilization as zero. is that not much earlier. Well it's relevant to make a baseline so that I can calculate the difference from then until now. That's the only reason thusfar. > > whats the structure of the egyptian|rpg calendar? A year consists of 769 days, 13 months of 63 days a month, except for month 13 which has 14 days. Every month has 7 weeks of 9 days, of course month 13 is the exception. A day is 24 hours. > > > > >>>However, the functions php provides only allow up to the unix epoch. > >>> > >>>Could you guys give me some pointers on how to accomplish this, > >>>accurately? > >> > >>Take a look at the MySQL date ranges -- They may have a data type that > >>allows for more than just 1/1/1970 to 3/??/2038 > >> > >>If not, consider using PostgreSQL which has VERY extensive and flexible > >>date support, for ranges MUCH larger than 0 BC/AD. > >>http://postgresql.org > >> > >>I believe PostgreSQL even supports time scales on the order of geological > >>events and for astronomical purposes, though not with "day" accuracy. > >> > > +1 on using a DB to calculate and format dates on this one :-) > I'm guessing Kevins probably written an SQL statement before and he's > already proved he can RTFPM (P for PHP) > > >>I am assuming that by "accurately" you mean "to the nearest day" since you > >>spoke of "exact days", right? > > > > > > Aye.. it's nearest day, and according to calculations should have repeatable > > results. So what is date X today should also be it tomorrow (after the > > calculations of course). That's what i've noticed so far. when I add a date > > and convert it and then convert it back it is a different date. > > > > show us some code :-) At the end of the message code will be provided. > > >>But you didn't define how far into the future you need to go. > >>Current time? > >>A few years out? > >>Stardates from Star Trek? > >>You have to specify a start date, end date, and accuracy to choose a > >>correct calendar system. > > > > > > It's mostly the past. The RPG is set in Egypt and the beginning of the > > society in egypt has been taken as year 0. The start date I think is > > obvious, but I do not understand an end date of a calendar.. Perhaps I'm > > just blond.. but could you perhaps explain that one? > > > > I must be blond, I don't even grok that question :-/ WEll I don't understand why an end date is important or what is meant with accuracy. The term being blond is, at least in the Netherlands "a dumb blond", so I made it so that when I am dumb or anything, I'm blond (which in fact I am - dark blond) :-P. > > rgds, > jochem Code: function get_date_ec($EarthDay, $EarthMonth, $EarthYear) { $DayOfYear = 0; # Setting internal date variables. $intDay = intval($EarthDay); $intMonth = intval($EarthMonth); $intYear = intval($EarthYear); $array_MonthDays["1"] = intval(31); // January $array_MonthDays["3"] = intval(31); // March $array_MonthDays["4"] = intval(30); // April $array_MonthDays["5"] = intval(31); // May $array_MonthDays["6"] = intval(30); // June $array_MonthDays["7"] = intval(31); // July $array_MonthDays["8"] = intval(31); // August $array_MonthDays["9"] = intval(30); // September $array_MonthDays["10"] = intval(31); // October $array_MonthDays["11"] = intval(30); // November $array_MonthDays["12"] = intval(31); // December # Making a few Leap Year Checks $RETURN_CHECK_LEAP_YEAR = check_leap_year($intYear); if ($RETURN_CHECK_LEAP_YEAR == TRUE) { $array_MonthDays["2"] = intval(29); // february } else { $array_MonthDays["2"] = intval(28); // february }; if ($RETURN_CHECK_LEAP_YEAR == 1) { #check date if leapdate has passed. echo "$intYear is a LEAP YEAR <br> "; if (($intDay >= 29) AND ($intMonth >= 2)) { echo "LEAP DATE HAS PASSED!!!! <br>"; for ($n=1 ; $n<$intMonth ; $n++) { $DayOfYear = $DayOfYear + $array_MonthDays["$n"]; $testje = $array_MonthDays["$n"]+$intDay; echo "testje: $testje <br>"; }; $DayOfYear = $DayOfYear + $intDay; echo "$DayOfYear <Br>"; $intTotalDaysSinceEpoch = ($intYear * 365) + ($intYear / 4) + $DayOfYear; echo "$intTotalDaysSinceEpoch = ($intYear*365) + ($intYear /4) + $DayOfYear <br>"; echo "$intTotalDaysSinceEpoch = " . $intYear*365 ." + ". ($intYear /4) . "+ $DayOfYear <br><br>"; } else { echo "LEAP DATE HAS NOT YET PASSED..<br>"; for ($n=1 ; $n<$intMonth ; $n++) { $DayOfYear = $DayOfYear + $array_MonthDays["$n"]; $testje = $array_MonthDays["$n"]+$intDay; echo "testje: $testje <br>"; }; $DayOfYear = $DayOfYear + $intDay; echo "$DayOfYear <Br>"; $intTotalDaysSinceEpoch = ($intYear * 365) + (($intYear / 4) - 1) + $DayOfYear; echo "$intTotalDaysSinceEpoch = ($intYear*365) + (($intYear /4)-1) + $DayOfYear <br>"; echo "$intTotalDaysSinceEpoch = ". $intYear*365 . " + " . (($intYear /4)-1). " + $DayOfYear <br><br>"; }; } else { echo "$intYear is NOT a LEAP YEAR <br> "; }; # Calculating the year in Egypt. $yr_Egypt = floor($EgyptianDays / 769); # Calculating the Month in Egypt. $mnt_Egypt = round( ($EgyptianDays-($yr_Egypt*769)) / 63 ); # Calculating the Day in Egypt. $dy_Egypt = round( $EgyptianDays - (($yr_Egypt * 769) + ($mnt_Egypt * 63)) ); # Filling the date array variable with the day, month and year of the Egyptian calendar. $ec_date["Day"] = $dy_Egypt; $ec_date["Month"] = $mnt_Egypt; $ec_date["Year"] = $yr_Egypt; # Returning the Calculated date. return $ec_date; }; Here is the code to feed the function with the values: $DUMP = get_date_ec(1, 3, 2004); echo "<pre>"; var_dump($DUMP); echo "</pre>"; -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
