calc the working hours between 2 dates in PHP

Question

I have a function to return the difference between 2 dates, however I need to work out the difference in working hours, assuming Monday to Friday (9am to 5:30pm):

Answer 1

As the old saying goes "if you want something done right do it yourself". Not saying this is optimal but its atleast returning the correct amount of hours for me.

function biss_hours($start, $end){

    $startDate = new DateTime($start);
    $endDate = new DateTime($end);
    $periodInterval = new DateInterval( "PT1H" );

    $period = new DatePeriod( $startDate, $periodInterval, $endDate );
    $count = 0;

      foreach($period as $date){

           $startofday = clone $date;
           $startofday->setTime(8,30);

           $endofday = clone $date;
           $endofday->setTime(17,30);

    if($date > $startofday && $date <= $endofday && !in_array($date->format('l'), array('Sunday','Saturday'))){

        $count++;
    }

}

//Get seconds of Start time
$start_d = date("Y-m-d H:00:00", strtotime($start));
$start_d_seconds = strtotime($start_d);
$start_t_seconds = strtotime($start);
$start_seconds = $start_t_seconds - $start_d_seconds;

//Get seconds of End time
$end_d = date("Y-m-d H:00:00", strtotime($end));
$end_d_seconds = strtotime($end_d);
$end_t_seconds = strtotime($end);
$end_seconds = $end_t_seconds - $end_d_seconds;

$diff = $end_seconds-$start_seconds;

if($diff!=0):
    $count--;
endif;

$total_min_sec = date('i:s',$diff);

return $count .":".$total_min_sec;
}

$start = '2014-06-23 12:30:00';
$end = '2014-06-27 15:45:00';

$go = biss_hours($start,$end);
echo $go;