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<?php $x = 'a'; var_dump(isset($x->a->b->c[0]->d));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/F5u7p
function name:  (null)
number of ops:  10
compiled vars:  !0 = $x
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'a'
    5     1        INIT_FCALL                                               'var_dump'
          2        FETCH_OBJ_IS                                     ~2      !0, 'a'
          3        FETCH_OBJ_IS                                     ~3      ~2, 'b'
          4        FETCH_OBJ_IS                                     ~4      ~3, 'c'
          5        FETCH_DIM_IS                                     ~5      ~4, 0
          6        ISSET_ISEMPTY_PROP_OBJ                           ~6      ~5, 'd'
          7        SEND_VAL                                                 ~6
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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