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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($bar['a'])); var_dump(isset($bar['a']['b']));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/pokbl
function name:  (null)
number of ops:  26
compiled vars:  !0 = $foo, !1 = $bar
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  ~3      !0, 'a'
          3        SEND_VAL                                                 ~3
          4        DO_ICALL                                                 
    6     5        INIT_FCALL                                               'var_dump'
          6        FETCH_DIM_IS                                     ~5      !0, 'a'
          7        ISSET_ISEMPTY_DIM_OBJ                         0  ~6      ~5, 'b'
          8        SEND_VAL                                                 ~6
          9        DO_ICALL                                                 
    7    10        INIT_FCALL                                               'var_dump'
         11        FETCH_DIM_IS                                     ~8      !0, 'a'
         12        FETCH_OBJ_IS                                     ~9      ~8, 'bar'
         13        ISSET_ISEMPTY_DIM_OBJ                         0  ~10     ~9, 'b'
         14        SEND_VAL                                                 ~10
         15        DO_ICALL                                                 
    8    16        INIT_FCALL                                               'var_dump'
         17        ISSET_ISEMPTY_DIM_OBJ                         0  ~12     !1, 'a'
         18        SEND_VAL                                                 ~12
         19        DO_ICALL                                                 
    9    20        INIT_FCALL                                               'var_dump'
         21        FETCH_DIM_IS                                     ~14     !1, 'a'
         22        ISSET_ISEMPTY_DIM_OBJ                         0  ~15     ~14, 'b'
         23        SEND_VAL                                                 ~15
         24        DO_ICALL                                                 
         25      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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