Online PHP editor | output for DeWqY

<?php $beginday=date('Y-m-01'); $lastday=date('Y-m-t'); $nr_work_days = getWorkingDays($beginday,$lastday); echo $nr_work_days; function getWorkingDays($startDate, $endDate){ $begin=strtotime($startDate); $end=strtotime($endDate); if($begin>$end){ echo "startdate is in the future! <br>"; return 0; }else{ $working_days=0; $total_days=0; while($begin<=$end){ $what_day=date("N",$begin); $total_days++; if($what_day<=5) { // 6 and 7 are weekend days $working_days++; }; $begin+=86400; // +1 day }; $testString = "working days: " . $working_days . " total days: " . $total_days; return $testString; }