hari pada bulan berjalan

<?php
/*
    fungsi untuk mengeluarkan hari kerja dalam beberapa minggu
*/
function dayinMonth($date=''){
//  $i = 1;
    $kalender=array();
    $aDay=array();
    $startDate="Saturday";
    if($date=='')$date=date("Y-m-1");
    $numDate = strtotime($date);
    $last_date = date("t",$numDate);
    $start = date("d",$numDate);

    for($i=$start ;$i <= $last_date; $i++){
//      $d = date("d",$date);
//      $d = $d + $i;
        $date2='Y-m-'.$i;
        $numDate2 = date($date2,$numDate);
        $day = date('l',strtotime($numDate2));
        // $hari[] = $date2;
        // $kalender ['week'.$w] = $hari;
        $aDay[]=$hari;
        if ($day == $startDate && count($aDay)>1){
            $w++;
        }
        $week[$w]=array(
            'date'=>$date2,
            'day'=>$day,

        );

    }
    $kalender=array(
        'week'=>$week,
    );

return $kalender;
}
$kalender = dayinMonth(date('Y-m-01'));
var_dump($kalender);