Re: Calendar math .... how to count in week days....?

The PEAR functions didn't seem to do what I was looking for. I built this function based on an idea given to me by Daryl Meese. After much trial and error, it actualy does what I need. My function is bassed on hours but you can easily change that. It will add or subtract days. - Anthony /* buisinessDays * Calculates a new date bassed on buisiness hours * vars: hours to adjust by, timestamp * returns: adjusted timestamp */ function businessDays($hours,$date) { // this function assumes $date is a business day $dayHours=7.5; // set how many hours are in a day // set the days we need to adjust by. there is a one day buffer $days=(abs($hours/$dayHours))+1; // weeks $adjust=604800 * floor($days / 5); // how many days are left over $remain=round($days % 5); // check for negative if ($hours<0) { // check to see if we will land on a weekend, and make appropriate adjustment if (date("w",$date)<=$remain) { $remain +=2; } // make the time adjustment, 86400000 microseconds in a day, times the remaining adjustment $date -=($adjust +(86400 * $remain)); } else { // check to see if we will land on a weekend, and make appropriate adjustment if ((6-date("w",$date))<=$remain) { $remain+=2; } // make the time adjustment, 86400000 microseconds in a day, times the remaining adjustment $date +=($adjust +(86400 * $remain)); } return $date; }