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<?php $a = ['i' => 'a']; var_dump($a['i'] ?: 'empty'); var_dump($a['i'] ?? 'empty'); var_dump($a['j'] ?: 'empty'); var_dump($a['j'] ?? 'empty'); var_dump($a['j'] ?? $a['i'] ?: 'empty');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/A0kJ6
function name:  (null)
number of ops:  35
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        INIT_FCALL                                               'var_dump'
          2        FETCH_DIM_R                                      ~2      !0, 'i'
          3        JMP_SET                                          ~3      ~2, ->5
          4        QM_ASSIGN                                        ~3      'empty'
          5        SEND_VAL                                                 ~3
          6        DO_ICALL                                                 
    6     7        INIT_FCALL                                               'var_dump'
          8        FETCH_DIM_IS                                     ~5      !0, 'i'
          9        COALESCE                                         ~6      ~5
         10        QM_ASSIGN                                        ~6      'empty'
         11        SEND_VAL                                                 ~6
         12        DO_ICALL                                                 
    7    13        INIT_FCALL                                               'var_dump'
         14        FETCH_DIM_R                                      ~8      !0, 'j'
         15        JMP_SET                                          ~9      ~8, ->17
         16        QM_ASSIGN                                        ~9      'empty'
         17        SEND_VAL                                                 ~9
         18        DO_ICALL                                                 
    8    19        INIT_FCALL                                               'var_dump'
         20        FETCH_DIM_IS                                     ~11     !0, 'j'
         21        COALESCE                                         ~12     ~11
         22        QM_ASSIGN                                        ~12     'empty'
         23        SEND_VAL                                                 ~12
         24        DO_ICALL                                                 
    9    25        INIT_FCALL                                               'var_dump'
         26        FETCH_DIM_IS                                     ~14     !0, 'j'
         27        COALESCE                                         ~15     ~14
         28        FETCH_DIM_R                                      ~16     !0, 'i'
         29        QM_ASSIGN                                        ~15     ~16
         30        JMP_SET                                          ~17     ~15, ->32
         31        QM_ASSIGN                                        ~17     'empty'
         32        SEND_VAL                                                 ~17
         33        DO_ICALL                                                 
         34      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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