<?php
        function calculateWorkingDays($fromDate,$tillDate) {
            $arrDatumRange = range(
                strtotime($fromDate) ,
                strtotime($tillDate) ,
                (3600*24)
            );
            foreach ($arrDatumRange as $key=>$iTime) {
                if (date("N",$iTime) != 6 && date("N",$iTime) != 7) {
                    $arrDatumRange[$key] = date("j-n-Y",$iTime);
                } else {
                    unset ($arrDatumRange[$key]);
                }
            }
            return $arrDatumRange;
        }
 
// Example:
$arrWorkingDayDates = calculateWorkingDays("20-1-2009","19-4-2009");
?>

<?php
function getNoWorkingDays()
 
    {
 
    $days_in_month = date('t');
 
    $noofwokingdays=0;
 
 
    for ($j=0; $j<$days_in_month; $j++)
    {
 
    $d = $j + 1;
    $my = date('m-Y');
    $day_of_week = date('w', strtotime("$d-$my", 0));
    if ( $day_of_week == 6 || $day_of_week == 0)
        {
 
        $noofwokingdays=$noofwokingdays;
 
        }
    else
        {
        $noofwokingdays++;
        }
 
    }
 
    return $noofwokingdays;
 
    }
?>

<?php
/**
 * Finds the difference in days between two calendar dates.
 *
 * @param Date $startDate
 * @param Date $endDate
 * @return Int
 */
function dateDiff($startDate, $endDate)
{
    // Parse dates for conversion
    $startArry = date_parse($startDate);
    $endArry = date_parse($endDate);
 
    // Convert dates to Julian Days
    $start_date = gregoriantojd($startArry["month"], $startArry["day"], $startArry["year"]);
    $end_date = gregoriantojd($endArry["month"], $endArry["day"], $endArry["year"]);
 
    // Return difference
    return round(($end_date - $start_date), 0);
}
?>