Parametre array dans fonction

Bonjour,

j'ai trouvé fonctions qui calculte nombre de jours total entre deux dates sans compter weekend

<?php
//The function returns the no. of business days between two dates and it skeeps the holidays
function getWorkingDays($startDate,$endDate,$holidays){
    //The total number of days between the two dates. We compute the no. of seconds and divide it to 60*60*24
    //We add one to inlude both dates in the interval.
    $days = (strtotime($endDate) - strtotime($startDate)) / 86400 + 1;

    $no_full_weeks = floor($days / 7);
    $no_remaining_days = fmod($days, 7);

    //It will return 1 if it's Monday,.. ,7 for Sunday
    $the_first_day_of_week = date("N",strtotime($startDate));
    $the_last_day_of_week = date("N",strtotime($endDate));

    //---->The two can be equal in leap years when february has 29 days, the equal sign is added here
    //In the first case the whole interval is within a week, in the second case the interval falls in two weeks.
    if ($the_first_day_of_week <= $the_last_day_of_week){
        if ($the_first_day_of_week <= 6 && 6 <= $the_last_day_of_week) $no_remaining_days--;
        if ($the_first_day_of_week <= 7 && 7 <= $the_last_day_of_week) $no_remaining_days--;
    }
    else{
        if ($the_first_day_of_week <= 6) $no_remaining_days--;
        //In the case when the interval falls in two weeks, there will be a Sunday for sure
        $no_remaining_days--;
    }

    //The no. of business days is: (number of weeks between the two dates) * (5 working days) + the remainder
//---->february in none leap years gave a remainder of 0 but still calculated weekends between first and last day, this is one way to fix it
   $workingDays = $no_full_weeks * 5;
    if ($no_remaining_days > 0 )
    {
      $workingDays += $no_remaining_days;
    }

    //We subtract the holidays
    foreach($holidays as $holiday){
        $time_stamp=strtotime($holiday);
        //If the holiday doesn't fall in weekend
        if (strtotime($startDate) <= $time_stamp && $time_stamp <= strtotime($endDate) && date("N",$time_stamp) != 6 && date("N",$time_stamp) != 7)
            $workingDays--;
    }

    return $workingDays;
}
?>

et si je met

<?php
$holidays=array("2006-12-25","2006-12-26","2007-01-01");

echo getWorkingDays("2006-12-22","2007-01-06",$holidays)
?>

j'aurais resultat 8
mais comment on fait pour donner beaucoup de dates a cete fonction et avoir resultat total
par exemple si je done deux foix ces deux dates j'aurais résultat 16
j'ai essayé de déclarer array dans fonction mais toujours erreur:

<?php
Parse error: parse error, unexpected T_VARIABLE, expecting ')' 
?>