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<?php $a = []; if (isset($a['key']) && $a['key'] > 5) { echo 'See, no errors!'; } else { echo 'But the result is `false`'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 3, Position 2 = 6
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 9
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 10
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
filename:       /in/BMd4V
function name:  (null)
number of ops:  11
compiled vars:  !0 = $a
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
    5     1        ISSET_ISEMPTY_DIM_OBJ                             0  ~2      !0, 'key'
          2      > JMPZ_EX                                              ~2      ~2, ->6
          3    >   FETCH_DIM_R                                          ~3      !0, 'key'
          4        IS_SMALLER                                           ~4      5, ~3
          5        BOOL                                                 ~2      ~4
          6    > > JMPZ                                                         ~2, ->9
    6     7    >   ECHO                                                         'See%2C+no+errors%21'
    5     8      > JMP                                                          ->10
    8     9    >   ECHO                                                         'But+the+result+is+%60false%60'
    9    10    > > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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