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<?php $maybeHasAB = ['a value']; $defaultAB = ['a default', 'b default']; [$a, $b] = ($maybeHasAB + $defaultAB); var_dump($a, $b); $a = $maybeHasAB[0] ?? $defaultAB[0]; $b = $maybeHasAB[1] ?? $defaultAB[1]; var_dump($a, $b);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/i6VPT
function name:  (null)
number of ops:  27
compiled vars:  !0 = $maybeHasAB, !1 = $defaultAB, !2 = $a, !3 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        ASSIGN                                                   !1, <array>
    6     2        ADD                                              ~6      !0, !1
          3        FETCH_LIST_R                                     $7      ~6, 0
          4        ASSIGN                                                   !2, $7
          5        FETCH_LIST_R                                     $9      ~6, 1
          6        ASSIGN                                                   !3, $9
          7        FREE                                                     ~6
    8     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !2
         10        SEND_VAR                                                 !3
         11        DO_ICALL                                                 
   10    12        FETCH_DIM_IS                                     ~12     !0, 0
         13        COALESCE                                         ~13     ~12
         14        FETCH_DIM_R                                      ~14     !1, 0
         15        QM_ASSIGN                                        ~13     ~14
         16        ASSIGN                                                   !2, ~13
   11    17        FETCH_DIM_IS                                     ~16     !0, 1
         18        COALESCE                                         ~17     ~16
         19        FETCH_DIM_R                                      ~18     !1, 1
         20        QM_ASSIGN                                        ~17     ~18
         21        ASSIGN                                                   !3, ~17
   13    22        INIT_FCALL                                               'var_dump'
         23        SEND_VAR                                                 !2
         24        SEND_VAR                                                 !3
         25        DO_ICALL                                                 
         26      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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