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<?php $_GET['value'] = true; $x = $_GET['value'] ?? false ?: 'Default'; var_dump($x); $_GET['value'] = false; $x = $_GET['value'] ?? false ?: 'Default'; var_dump($x);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/tlXO1
function name:  (null)
number of ops:  27
compiled vars:  !0 = $x
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   FETCH_W                      global              $1      '_GET'
          1        ASSIGN_DIM                                               $1, 'value'
          2        OP_DATA                                                  <true>
    3     3        FETCH_IS                                         ~3      '_GET'
          4        FETCH_DIM_IS                                     ~4      ~3, 'value'
          5        COALESCE                                         ~5      ~4
          6        QM_ASSIGN                                        ~5      <false>
          7        JMP_SET                                          ~6      ~5, ->9
          8        QM_ASSIGN                                        ~6      'Default'
          9        ASSIGN                                                   !0, ~6
    4    10        INIT_FCALL                                               'var_dump'
         11        SEND_VAR                                                 !0
         12        DO_ICALL                                                 
    6    13        FETCH_W                      global              $9      '_GET'
         14        ASSIGN_DIM                                               $9, 'value'
         15        OP_DATA                                                  <false>
    7    16        FETCH_IS                                         ~11     '_GET'
         17        FETCH_DIM_IS                                     ~12     ~11, 'value'
         18        COALESCE                                         ~13     ~12
         19        QM_ASSIGN                                        ~13     <false>
         20        JMP_SET                                          ~14     ~13, ->22
         21        QM_ASSIGN                                        ~14     'Default'
         22        ASSIGN                                                   !0, ~14
    8    23        INIT_FCALL                                               'var_dump'
         24        SEND_VAR                                                 !0
         25        DO_ICALL                                                 
         26      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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