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<?php $dt1 = new \DateTimeImmutable('2017-01-01T00:00:00.000000Z'); $dt2 = new \DateTimeImmutable('2017-01-01T00:00:00.123456Z'); $diff = $dt1->diff($dt2); //var_dump($diff); var_dump($diff->f); var_dump(get_object_vars($diff)['f']); var_dump($diff->f === get_object_vars($diff)['f']);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/sM32U
function name:  (null)
number of ops:  33
compiled vars:  !0 = $dt1, !1 = $dt2, !2 = $diff
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $3      'DateTimeImmutable'
          1        SEND_VAL_EX                                              '2017-01-01T00%3A00%3A00.000000Z'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $3
    4     4        NEW                                              $6      'DateTimeImmutable'
          5        SEND_VAL_EX                                              '2017-01-01T00%3A00%3A00.123456Z'
          6        DO_FCALL                                      0          
          7        ASSIGN                                                   !1, $6
    5     8        INIT_METHOD_CALL                                         !0, 'diff'
          9        SEND_VAR_EX                                              !1
         10        DO_FCALL                                      0  $9      
         11        ASSIGN                                                   !2, $9
    7    12        INIT_FCALL                                               'var_dump'
         13        FETCH_OBJ_R                                      ~11     !2, 'f'
         14        SEND_VAL                                                 ~11
         15        DO_ICALL                                                 
    8    16        INIT_FCALL                                               'var_dump'
         17        INIT_FCALL                                               'get_object_vars'
         18        SEND_VAR                                                 !2
         19        DO_ICALL                                         $13     
         20        FETCH_DIM_R                                      ~14     $13, 'f'
         21        SEND_VAL                                                 ~14
         22        DO_ICALL                                                 
    9    23        INIT_FCALL                                               'var_dump'
         24        FETCH_OBJ_R                                      ~16     !2, 'f'
         25        INIT_FCALL                                               'get_object_vars'
         26        SEND_VAR                                                 !2
         27        DO_ICALL                                         $17     
         28        FETCH_DIM_R                                      ~18     $17, 'f'
         29        IS_IDENTICAL                                     ~19     ~16, ~18
         30        SEND_VAL                                                 ~19
         31        DO_ICALL                                                 
         32      > RETURN                                                   1

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