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<?php $test = ''; var_dump($test[0], isset($test[0]), $test === '');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hqebU
function name:  (null)
number of ops:  10
compiled vars:  !0 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, ''
    3     1        INIT_FCALL                                               'var_dump'
          2        FETCH_DIM_R                                      ~2      !0, 0
          3        SEND_VAL                                                 ~2
          4        ISSET_ISEMPTY_DIM_OBJ                         0  ~3      !0, 0
          5        SEND_VAL                                                 ~3
          6        IS_IDENTICAL                                     ~4      !0, ''
          7        SEND_VAL                                                 ~4
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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