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<?php $a = NULL; $c = ''; print $a ?? '1b'; print "\n"; print $a ?: '2b'; print "\n"; print $c ?? '1d'; print "\n"; print $c ?: '2d'; print "\n"; print $e ?? '1f'; print "\n"; print $e ?: '2f';
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ZBAa1
function name:  (null)
number of ops:  26
compiled vars:  !0 = $a, !1 = $c, !2 = $e
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, null
   4     1        ASSIGN                                                   !1, ''
   6     2        COALESCE                                         ~5      !0
         3        QM_ASSIGN                                        ~5      '1b'
         4        ECHO                                                     ~5
   7     5        ECHO                                                     '%0A'
   9     6        JMP_SET                                          ~6      !0, ->8
         7        QM_ASSIGN                                        ~6      '2b'
         8        ECHO                                                     ~6
  10     9        ECHO                                                     '%0A'
  12    10        COALESCE                                         ~7      !1
        11        QM_ASSIGN                                        ~7      '1d'
        12        ECHO                                                     ~7
  13    13        ECHO                                                     '%0A'
  15    14        JMP_SET                                          ~8      !1, ->16
        15        QM_ASSIGN                                        ~8      '2d'
        16        ECHO                                                     ~8
  16    17        ECHO                                                     '%0A'
  18    18        COALESCE                                         ~9      !2
        19        QM_ASSIGN                                        ~9      '1f'
        20        ECHO                                                     ~9
  19    21        ECHO                                                     '%0A'
  21    22        JMP_SET                                          ~10     !2, ->24
        23        QM_ASSIGN                                        ~10     '2f'
        24        ECHO                                                     ~10
        25      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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