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<?php var_dump($b ?? $c ?? 1); // 1 var_dump($b ?? ($c ?? 1)); // 1 var_dump(($b ?? $c) ?? 1); // 1
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/oKaFh
function name:  (null)
number of ops:  22
compiled vars:  !0 = $b, !1 = $c
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        COALESCE                                         ~2      !0
          2        COALESCE                                         ~3      !1
          3        QM_ASSIGN                                        ~3      1
          4        QM_ASSIGN                                        ~2      ~3
          5        SEND_VAL                                                 ~2
          6        DO_ICALL                                                 
    4     7        INIT_FCALL                                               'var_dump'
          8        COALESCE                                         ~5      !0
          9        COALESCE                                         ~6      !1
         10        QM_ASSIGN                                        ~6      1
         11        QM_ASSIGN                                        ~5      ~6
         12        SEND_VAL                                                 ~5
         13        DO_ICALL                                                 
    5    14        INIT_FCALL                                               'var_dump'
         15        COALESCE                                         ~8      !0
         16        QM_ASSIGN                                        ~8      !1
         17        COALESCE                                         ~9      ~8
         18        QM_ASSIGN                                        ~9      1
         19        SEND_VAL                                                 ~9
         20        DO_ICALL                                                 
         21      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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