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<?php $test = array(); $test['one'] = array(); $false = false; $test['one'][$false] = 'three'; var_dump(isset($test['one'][$false])); $false = (string) $false; var_dump(isset($test['one'][$false]));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/X1aPm
function name:  (null)
number of ops:  20
compiled vars:  !0 = $test, !1 = $false
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1        ASSIGN_DIM                                               !0, 'one'
          2        OP_DATA                                                  <array>
    4     3        ASSIGN                                                   !1, <false>
    5     4        FETCH_DIM_W                                      $5      !0, 'one'
          5        ASSIGN_DIM                                               $5, !1
          6        OP_DATA                                                  'three'
    6     7        INIT_FCALL                                               'var_dump'
          8        FETCH_DIM_IS                                     ~7      !0, 'one'
          9        ISSET_ISEMPTY_DIM_OBJ                         0  ~8      ~7, !1
         10        SEND_VAL                                                 ~8
         11        DO_ICALL                                                 
    7    12        CAST                                          6  ~10     !1
         13        ASSIGN                                                   !1, ~10
    8    14        INIT_FCALL                                               'var_dump'
         15        FETCH_DIM_IS                                     ~12     !0, 'one'
         16        ISSET_ISEMPTY_DIM_OBJ                         0  ~13     ~12, !1
         17        SEND_VAL                                                 ~13
         18        DO_ICALL                                                 
         19      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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