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<?php $test = ''; $ar = array('' => 'test'); if (!empty($test) && isset($ar[$test])) { echo $ar[$test]; } else { echo "false"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 5, Position 2 = 7
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 11
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 12
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 11
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
filename:       /in/cK5p3
function name:  (null)
number of ops:  13
compiled vars:  !0 = $test, !1 = $ar
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, ''
    5     1        ASSIGN                                                   !1, <array>
    7     2        ISSET_ISEMPTY_CV                                 ~4      !0
          3        BOOL_NOT                                         ~5      ~4
          4      > JMPZ_EX                                          ~5      ~5, ->7
          5    >   ISSET_ISEMPTY_DIM_OBJ                         0  ~6      !1, !0
          6        BOOL                                             ~5      ~6
          7    > > JMPZ                                                     ~5, ->11
    8     8    >   FETCH_DIM_R                                      ~7      !1, !0
          9        ECHO                                                     ~7
         10      > JMP                                                      ->12
   11    11    >   ECHO                                                     'false'
   12    12    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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