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<?php $data = json_decode('{"a": {"b": [], "c": {}}}'); var_dump(isset($data->a->d));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ktUbh
function name:  (null)
number of ops:  10
compiled vars:  !0 = $data
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'json_decode'
          1        SEND_VAL                                                 '%7B%22a%22%3A+%7B%22b%22%3A+%5B%5D%2C+%22c%22%3A+%7B%7D%7D%7D'
          2        DO_ICALL                                         $1      
          3        ASSIGN                                                   !0, $1
    5     4        INIT_FCALL                                               'var_dump'
          5        FETCH_OBJ_IS                                     ~3      !0, 'a'
          6        ISSET_ISEMPTY_PROP_OBJ                           ~4      ~3, 'd'
          7        SEND_VAL                                                 ~4
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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