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<?php var_dump(isset($some->variable->that["doesn't"]->exist)); var_dump($some->variable->that["doesn't"]->exist ?? 'default value');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/eIOtj
function name:  (null)
number of ops:  17
compiled vars:  !0 = $some
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        FETCH_OBJ_IS                                     ~1      !0, 'variable'
          2        FETCH_OBJ_IS                                     ~2      ~1, 'that'
          3        FETCH_DIM_IS                                     ~3      ~2, 'doesn%27t'
          4        ISSET_ISEMPTY_PROP_OBJ                           ~4      ~3, 'exist'
          5        SEND_VAL                                                 ~4
          6        DO_ICALL                                                 
    4     7        INIT_FCALL                                               'var_dump'
          8        FETCH_OBJ_IS                                     ~6      !0, 'variable'
          9        FETCH_OBJ_IS                                     ~7      ~6, 'that'
         10        FETCH_DIM_IS                                     ~8      ~7, 'doesn%27t'
         11        FETCH_OBJ_IS                                     ~9      ~8, 'exist'
         12        COALESCE                                         ~10     ~9
         13        QM_ASSIGN                                        ~10     'default+value'
         14        SEND_VAL                                                 ~10
         15        DO_ICALL                                                 
         16      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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