php date/week problem

[BlueFire]

I'm kind of at a loss here. It seems as though somehow my code is missing a whole week at the end of 2009 and I've tried a couple different things.My base function to get the start and end date for a week is below. Given a Year, Week and Day of the Week it gives you a date.\[code\]function datefromweeknr($aYear, $aWeek, $aDay) { $Days=array('xx','ma','di','wo','do','vr','za','zo'); //xx = Current Sun, ma = Mon ..... zo = Sun of the next Week $DayOfWeek=array_search($aDay,$Days); //get day of week (1=Monday) $DayOfWeekRef = date("w", mktime (0,0,0,1,4,$aYear)); //get day of week of January 4 (always week 1) if ($DayOfWeekRef==0){ $DayOfWeekRef=7; } $ResultDate=mktime(0,0,0,1,4,$aYear)+((($aWeek-1)*7+($DayOfWeek-$DayOfWeekRef))*86400); return $ResultDate; }\[/code\]Seemed to work completely fine until I realized that I was missing the week of December 27th 2009 to January 2nd 2010.\[code\]echo '<table border="1">';for($i = 1; $i < 53; $i++){ if($i < 10){ $w = '0'.$i.'1'; } else{ $w = $i.'1'; } echo '<tr><td>Week#'.$i.' </td><td> '.date("Y-m-d",datefromweeknr(2009,$i,"xx")).' </td><td> '.date("Y-m-d",datefromweeknr(2009, $i,"za")).'</td><td> Week = '.date("W: Y-m-d",strtotime("2009W$w")).' </td></tr>';}echo '</table>';\[/code\]It seems the 52nd week of the year ends on 2009-12-26 and the 1st week of the new year starts on 2010-01-03. I'm losing a whole week, No Bueno!Anyone know what I'm doing wrong or can point me to a fool proof way of supplying a week number and a year to get me the start and end date of that week without losing any days in the process?