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<?php $x = 1; if (@$z != 5 || !isset($x)) echo 'not set';
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 47) Position 1 = 6, Position 2 = 9
Branch analysis from position: 6
2 jumps found. (Code = 43) Position 1 = 10, Position 2 = 11
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 11
Branch analysis from position: 9
filename:       /in/9fh2U
function name:  (null)
number of ops:  12
compiled vars:  !0 = $x
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 1
    5     1        BEGIN_SILENCE                                    ~2      
          2        FETCH_R                      local               ~3      'z'
          3        END_SILENCE                                              ~2
          4        IS_NOT_EQUAL                                     ~4      ~3, 5
          5      > JMPNZ_EX                                         ~4      ~4, ->9
          6    >   ISSET_ISEMPTY_CV                                 ~5      !0
          7        BOOL_NOT                                         ~6      ~5
          8        BOOL                                             ~4      ~6
          9    > > JMPZ                                                     ~4, ->11
         10    >   ECHO                                                     'not+set'
         11    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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