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<?php $x = NULL; $y = NULL; $z = 3; var_dump($x ?? $y ?? $z); // int(3) $a = false; $b = true; var_dump($a ?? $b); // bool(false) $d = 42; var_dump($c ?? $d); // int(42) $e = $c; var_dump($e);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gIrL4
function name:  (null)
number of ops:  28
compiled vars:  !0 = $x, !1 = $y, !2 = $z, !3 = $a, !4 = $b, !5 = $d, !6 = $c, !7 = $e
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, null
    4     1        ASSIGN                                                   !1, null
    5     2        ASSIGN                                                   !2, 3
    6     3        INIT_FCALL                                               'var_dump'
          4        COALESCE                                         ~11     !0
          5        COALESCE                                         ~12     !1
          6        QM_ASSIGN                                        ~12     !2
          7        QM_ASSIGN                                        ~11     ~12
          8        SEND_VAL                                                 ~11
          9        DO_ICALL                                                 
    8    10        ASSIGN                                                   !3, <false>
    9    11        ASSIGN                                                   !4, <true>
   11    12        INIT_FCALL                                               'var_dump'
         13        COALESCE                                         ~16     !3
         14        QM_ASSIGN                                        ~16     !4
         15        SEND_VAL                                                 ~16
         16        DO_ICALL                                                 
   13    17        ASSIGN                                                   !5, 42
   14    18        INIT_FCALL                                               'var_dump'
         19        COALESCE                                         ~19     !6
         20        QM_ASSIGN                                        ~19     !5
         21        SEND_VAL                                                 ~19
         22        DO_ICALL                                                 
   15    23        ASSIGN                                                   !7, !6
   16    24        INIT_FCALL                                               'var_dump'
         25        SEND_VAR                                                 !7
         26        DO_ICALL                                                 
         27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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