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<?php $period_durations = [ 'every_2_hours' => 2, 'every_4_hours' => 4, 'every_8_hours' => 8, ]; $period = 'every_8_hours'; $hour = (int) date('G'); $duration = $period_durations[$period]; $hour = ((int)($hour/$duration)+1)*$duration; // drop remainder $dateTime = new DateTime(); $dateTime->setTime($hour, 0, 0); print_r($dateTime);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/oFfaU
function name:  (null)
number of ops:  26
compiled vars:  !0 = $period_durations, !1 = $period, !2 = $hour, !3 = $duration, !4 = $dateTime
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   ASSIGN                                                   !0, <array>
   10     1        ASSIGN                                                   !1, 'every_8_hours'
   12     2        INIT_FCALL                                               'date'
          3        SEND_VAL                                                 'G'
          4        DO_ICALL                                         $7      
          5        CAST                                          4  ~8      $7
          6        ASSIGN                                                   !2, ~8
   14     7        FETCH_DIM_R                                      ~10     !0, !1
          8        ASSIGN                                                   !3, ~10
   16     9        DIV                                              ~12     !2, !3
         10        CAST                                          4  ~13     ~12
         11        ADD                                              ~14     ~13, 1
         12        MUL                                              ~15     !3, ~14
         13        ASSIGN                                                   !2, ~15
   18    14        NEW                                              $17     'DateTime'
         15        DO_FCALL                                      0          
         16        ASSIGN                                                   !4, $17
   19    17        INIT_METHOD_CALL                                         !4, 'setTime'
         18        SEND_VAR_EX                                              !2
         19        SEND_VAL_EX                                              0
         20        SEND_VAL_EX                                              0
         21        DO_FCALL                                      0          
   21    22        INIT_FCALL                                               'print_r'
         23        SEND_VAR                                                 !4
         24        DO_ICALL                                                 
         25      > RETURN                                                   1

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