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<?php $foo = array(); var_dump(isset($foo['a'])); var_dump(isset($foo['a']['b'])); var_dump(isset($foo['a']->bar['b'])); var_dump(isset($foo[$bar][$baz])); var_dump(isset($bar['a'])); var_dump(isset($bar['a']['b']));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CJh5e
function name:  (null)
number of ops:  31
compiled vars:  !0 = $foo, !1 = $bar, !2 = $baz
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        INIT_FCALL                                               'var_dump'
          2        ISSET_ISEMPTY_DIM_OBJ                         0  ~4      !0, 'a'
          3        SEND_VAL                                                 ~4
          4        DO_ICALL                                                 
    6     5        INIT_FCALL                                               'var_dump'
          6        FETCH_DIM_IS                                     ~6      !0, 'a'
          7        ISSET_ISEMPTY_DIM_OBJ                         0  ~7      ~6, 'b'
          8        SEND_VAL                                                 ~7
          9        DO_ICALL                                                 
    7    10        INIT_FCALL                                               'var_dump'
         11        FETCH_DIM_IS                                     ~9      !0, 'a'
         12        FETCH_OBJ_IS                                     ~10     ~9, 'bar'
         13        ISSET_ISEMPTY_DIM_OBJ                         0  ~11     ~10, 'b'
         14        SEND_VAL                                                 ~11
         15        DO_ICALL                                                 
    8    16        INIT_FCALL                                               'var_dump'
         17        FETCH_DIM_IS                                     ~13     !0, !1
         18        ISSET_ISEMPTY_DIM_OBJ                         0  ~14     ~13, !2
         19        SEND_VAL                                                 ~14
         20        DO_ICALL                                                 
    9    21        INIT_FCALL                                               'var_dump'
         22        ISSET_ISEMPTY_DIM_OBJ                         0  ~16     !1, 'a'
         23        SEND_VAL                                                 ~16
         24        DO_ICALL                                                 
   10    25        INIT_FCALL                                               'var_dump'
         26        FETCH_DIM_IS                                     ~18     !1, 'a'
         27        ISSET_ISEMPTY_DIM_OBJ                         0  ~19     ~18, 'b'
         28        SEND_VAL                                                 ~19
         29        DO_ICALL                                                 
         30      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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