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<?php $a = ['bar' => '42']; var_dump($a['foo'] ?? 42); var_dump($a['bar'] ?? 42); var_dump((int)($a['foo'] ?? 42)); var_dump((int)($a['bar'] ?? 42));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/vSEYW
function name:  (null)
number of ops:  28
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1        INIT_FCALL                                               'var_dump'
          2        FETCH_DIM_IS                                     ~2      !0, 'foo'
          3        COALESCE                                         ~3      ~2
          4        QM_ASSIGN                                        ~3      42
          5        SEND_VAL                                                 ~3
          6        DO_ICALL                                                 
    4     7        INIT_FCALL                                               'var_dump'
          8        FETCH_DIM_IS                                     ~5      !0, 'bar'
          9        COALESCE                                         ~6      ~5
         10        QM_ASSIGN                                        ~6      42
         11        SEND_VAL                                                 ~6
         12        DO_ICALL                                                 
    5    13        INIT_FCALL                                               'var_dump'
         14        FETCH_DIM_IS                                     ~8      !0, 'foo'
         15        COALESCE                                         ~9      ~8
         16        QM_ASSIGN                                        ~9      42
         17        CAST                                          4  ~10     ~9
         18        SEND_VAL                                                 ~10
         19        DO_ICALL                                                 
    6    20        INIT_FCALL                                               'var_dump'
         21        FETCH_DIM_IS                                     ~12     !0, 'bar'
         22        COALESCE                                         ~13     ~12
         23        QM_ASSIGN                                        ~13     42
         24        CAST                                          4  ~14     ~13
         25        SEND_VAL                                                 ~14
         26        DO_ICALL                                                 
         27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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