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<?php echo 'Should see "default value"' . "\n"; $empty_string = ""; $result1 = $empty_string ?: "default value"; var_dump($result1); echo 'Should see "overridden value"' . "\n"; $non_empty_string = "overridden value"; $result2 = $non_empty_string ?: "default value"; var_dump($result2);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/akFWq
function name:  (null)
number of ops:  17
compiled vars:  !0 = $empty_string, !1 = $result1, !2 = $non_empty_string, !3 = $result2
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ECHO                                                     'Should+see+%22default+value%22%0A'
    3     1        ASSIGN                                                   !0, ''
          2        JMP_SET                                          ~5      !0, ->4
          3        QM_ASSIGN                                        ~5      'default+value'
          4        ASSIGN                                                   !1, ~5
          5        INIT_FCALL                                               'var_dump'
          6        SEND_VAR                                                 !1
          7        DO_ICALL                                                 
    4     8        ECHO                                                     'Should+see+%22overridden+value%22%0A'
    5     9        ASSIGN                                                   !2, 'overridden+value'
         10        JMP_SET                                          ~9      !2, ->12
         11        QM_ASSIGN                                        ~9      'default+value'
         12        ASSIGN                                                   !3, ~9
         13        INIT_FCALL                                               'var_dump'
         14        SEND_VAR                                                 !3
         15        DO_ICALL                                                 
         16      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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