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<?php $a = 0; var_dump($a ?? 5, $b ?? 5);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/VHKe8
function name:  (null)
number of ops:  10
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 0
    4     1        INIT_FCALL                                               'var_dump'
          2        COALESCE                                         ~3      !0
          3        QM_ASSIGN                                        ~3      5
          4        SEND_VAL                                                 ~3
          5        COALESCE                                         ~4      !1
          6        QM_ASSIGN                                        ~4      5
          7        SEND_VAL                                                 ~4
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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