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<?php $arr = array('a' => 1); $var = 11; echo (isset($var) ? 'true' : 'false'); $var = @$arr['b']; echo (isset($var) ? 'true' : 'false');
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 6
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 7
Branch analysis from position: 7
2 jumps found. (Code = 43) Position 1 = 14, Position 2 = 16
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 17
Branch analysis from position: 17
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 16
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
2 jumps found. (Code = 43) Position 1 = 14, Position 2 = 16
Branch analysis from position: 14
Branch analysis from position: 16
filename:       /in/LefSE
function name:  (null)
number of ops:  19
compiled vars:  !0 = $arr, !1 = $var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        ASSIGN                                                   !1, 11
    5     2        ISSET_ISEMPTY_CV                                         !1
          3      > JMPZ                                                     ~4, ->6
          4    >   QM_ASSIGN                                        ~5      'true'
          5      > JMP                                                      ->7
          6    >   QM_ASSIGN                                        ~5      'false'
          7    >   ECHO                                                     ~5
    6     8        BEGIN_SILENCE                                    ~6      
          9        FETCH_DIM_R                                      ~7      !0, 'b'
         10        END_SILENCE                                              ~6
         11        ASSIGN                                                   !1, ~7
    7    12        ISSET_ISEMPTY_CV                                         !1
         13      > JMPZ                                                     ~9, ->16
         14    >   QM_ASSIGN                                        ~10     'true'
         15      > JMP                                                      ->17
         16    >   QM_ASSIGN                                        ~10     'false'
         17    >   ECHO                                                     ~10
         18      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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