View difference between Paste ID: TEEjW5Ck and 8zDxkMR4

 <?php
 class BusinessCalc
 {
     const BUSINESS_START = 9;
     const BUSINESS_END = 17;
     const SECONDS_PER_HOUR = 3600;
     const SECONDS_PER_DAY = 86400;
 
     /**
      * @var array $_excludedDays
      */
     protected $_excludedDays = array(6, 7);
 
     /**
      * @var DateTime $_start
      */
     protected $_start;
 
     /**
      * @param DateTime $start
      */
     public function __construct($start)
     {
         $this->_start = $start;
     }
 
     /**
      * @param DateTime $now
      * @return integer
      */
     public function calculateSeconds(DateTime $now)
     {
         $difference = 0;
         if ($this->_isBusinessDay($this->_start)
             && $this->_isInBusinessTime($this->_start)
         ) {
             $difference += $this->_getEndOfBusinessDay($this->_start)->getTimestamp()
                 - $this->_start->getTimestamp();
         }
 
         if ($this->_isBusinessDay($now)
             && $this->_isInBusinessTime($now)
         ) {
             $difference += $this->_getStartOfBusinessDay($now)->getTimestamp()
                 - $now->getTimestamp();
         }
 
         // the following part looks crappy but works ;)
         // adds business hours to difference
         // checks if the last day is reached, skips this, cause we already have this above
-        while ($dayIterator + 86400 < $now->getTimestamp()
+
         while ($dayIterator + self::SECONDS_PER_DAY < $now->getTimestamp()
             && $this->_getEndOfBusinessDay(new DateTime('@' . $dayIterator))->getTimestamp() < $now->getTimestamp()
-            $dayIterator += 86400;
+
             $dayIterator += self::SECONDS_PER_DAY;
             if ($this->_isBusinessDay(new DateTime('@' . $dayIterator))) {
                 $difference += (self::BUSINESS_END - self::BUSINESS_START) * self::SECONDS_PER_HOUR;
             }
 
         }
 
         return $difference;
     }
 
     /**
      * @param DateTime $time
      * @return DateTime
      */
     protected function _getEndOfBusinessDay($time)
     {
         $endOfDay = new DateTime('@' . $time->getTimestamp());
         $endOfDay->setTime(self::BUSINESS_END, 0, 0);
         return $endOfDay;
     }
 
     /**
      * @param DateTime $time
      * @return DateTime
      */
     protected function _getStartOfBusinessDay($time)
     {
         $startOfDay = new DateTime('@' . $time->getTimestamp());
         $startOfDay->setTime(self::BUSINESS_START, 0, 0);
         return $startOfDay;
     }
 
     /**
      * @param DateTime $time
      * @return integer
      */
     protected function _getWeekDay($time)
     {
         return date('N', $time->getTimestamp());
     }
 
     /**
      * @param DateTime $time
      * @return boolean
      */
     protected function _isInBusinessTime(DateTime $time)
     {
         if ($time->getTimestamp() <= $this->_getEndOfBusinessDay($time)->getTimestamp()
             && $time->getTimestamp() >= $this->_getStartOfBusinessDay($time)->getTimestamp()
         ) {
             return true;
         } else {
             return false;
         }
     }
 
     /**
      * @param DateTime $time
      * @return boolean
      */
     protected function _isBusinessDay($time)
     {
         $weekday = date('N', $time->getTimestamp());
         if (in_array($weekday, $this->_excludedDays) === true) {
             return true;
         } else {
             return false;
         }
     }
 }
 
 
 error_reporting(-1);
 $start = time() - 12234567;
 $a = new BusinessCalc(new DateTime('@' . $start));
 echo $a->calculateSeconds(new DateTime());