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<?php //set timezone to UTC to disregard daylight savings ini_set('date.timezone', 'America/New_York'); $date1 = new \DateTime('2006-01-01T12:00:00'); $date2 = new \DateTime('2006-06-01T12:00:00'); $interval = new \DateInterval('PT1H'); $periods = new \DatePeriod($date1, $interval, $date2); $hours = iterator_count($periods); echo $hours . ' hours';
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/eO9KE
function name:  (null)
number of ops:  29
compiled vars:  !0 = $date1, !1 = $date2, !2 = $interval, !3 = $periods, !4 = $hours
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   INIT_FCALL                                               'ini_set'
          1        SEND_VAL                                                 'date.timezone'
          2        SEND_VAL                                                 'America%2FNew_York'
          3        DO_ICALL                                                 
    5     4        NEW                                              $6      'DateTime'
          5        SEND_VAL_EX                                              '2006-01-01T12%3A00%3A00'
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !0, $6
    6     8        NEW                                              $9      'DateTime'
          9        SEND_VAL_EX                                              '2006-06-01T12%3A00%3A00'
         10        DO_FCALL                                      0          
         11        ASSIGN                                                   !1, $9
    7    12        NEW                                              $12     'DateInterval'
         13        SEND_VAL_EX                                              'PT1H'
         14        DO_FCALL                                      0          
         15        ASSIGN                                                   !2, $12
    9    16        NEW                                              $15     'DatePeriod'
         17        SEND_VAR_EX                                              !0
         18        SEND_VAR_EX                                              !2
         19        SEND_VAR_EX                                              !1
         20        DO_FCALL                                      0          
         21        ASSIGN                                                   !3, $15
   10    22        INIT_FCALL                                               'iterator_count'
         23        SEND_VAR                                                 !3
         24        DO_ICALL                                         $18     
         25        ASSIGN                                                   !4, $18
   11    26        CONCAT                                           ~20     !4, '+hours'
         27        ECHO                                                     ~20
         28      > RETURN                                                   1

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