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<?php $GLOBALS["x"] = $GLOBALS["x"] ?? []; var_dump($GLOBALS["x"]); $GLOBALS["y"] ??= []; var_dump($GLOBALS["y"]);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Y4146
function name:  (null)
number of ops:  20
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   FETCH_IS                                         ~1      'x'
          1        COALESCE                                         ~2      ~1
          2        QM_ASSIGN                                        ~2      <array>
          3        FETCH_W                      global              $0      'x'
          4        ASSIGN                                                   $0, ~2
    4     5        INIT_FCALL                                               'var_dump'
          6        FETCH_R                      global              ~4      'x'
          7        SEND_VAL                                                 ~4
          8        DO_ICALL                                                 
    5     9        FETCH_IS                                         ~6      'y'
         10        COALESCE                                         ~7      ~6
         11        FETCH_W                      global              $8      'y'
         12        ASSIGN                                           ~9      $8, <array>
         13        QM_ASSIGN                                        ~7      ~9
         14        FREE                                                     ~7
    6    15        INIT_FCALL                                               'var_dump'
         16        FETCH_R                      global              ~10     'y'
         17        SEND_VAL                                                 ~10
         18        DO_ICALL                                                 
         19      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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