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<?php class Foo { } $a = new Foo(); $z = array(); var_dump(isset($a->b->c)); //var_dump(isset($a->b->c['d'])); var_dump(isset($z['y']['x'])); var_dump(isset($a->b['c']->d)); var_dump(isset($a->b['c']['d'])); var_dump(isset($z['y']->x));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/WWsGI
function name:  (null)
number of ops:  32
compiled vars:  !0 = $a, !1 = $z
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   NEW                                              $2      'Foo'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $2
    5     3        ASSIGN                                                   !1, <array>
    6     4        INIT_FCALL                                               'var_dump'
          5        FETCH_OBJ_IS                                     ~6      !0, 'b'
          6        ISSET_ISEMPTY_PROP_OBJ                           ~7      ~6, 'c'
          7        SEND_VAL                                                 ~7
          8        DO_ICALL                                                 
    8     9        INIT_FCALL                                               'var_dump'
         10        FETCH_DIM_IS                                     ~9      !1, 'y'
         11        ISSET_ISEMPTY_DIM_OBJ                         0  ~10     ~9, 'x'
         12        SEND_VAL                                                 ~10
         13        DO_ICALL                                                 
    9    14        INIT_FCALL                                               'var_dump'
         15        FETCH_OBJ_IS                                     ~12     !0, 'b'
         16        FETCH_DIM_IS                                     ~13     ~12, 'c'
         17        ISSET_ISEMPTY_PROP_OBJ                           ~14     ~13, 'd'
         18        SEND_VAL                                                 ~14
         19        DO_ICALL                                                 
   10    20        INIT_FCALL                                               'var_dump'
         21        FETCH_OBJ_IS                                     ~16     !0, 'b'
         22        FETCH_DIM_IS                                     ~17     ~16, 'c'
         23        ISSET_ISEMPTY_DIM_OBJ                         0  ~18     ~17, 'd'
         24        SEND_VAL                                                 ~18
         25        DO_ICALL                                                 
   11    26        INIT_FCALL                                               'var_dump'
         27        FETCH_DIM_IS                                     ~20     !1, 'y'
         28        ISSET_ISEMPTY_PROP_OBJ                           ~21     ~20, 'x'
         29        SEND_VAL                                                 ~21
         30        DO_ICALL                                                 
         31      > RETURN                                                   1

Class Foo: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.0.0


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