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<?php $a = new stdClass(); $position = $a->lookahead['position'] ?? null; var_dump($position); $a->lookahead['position'] = 'test'; $position = $a->lookahead['position'] ?? null; var_dump($position);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/731YX
function name:  (null)
number of ops:  23
compiled vars:  !0 = $a, !1 = $position
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   NEW                                                  $2      'stdClass'
          1        DO_FCALL                                          0          
          2        ASSIGN                                                       !0, $2
    5     3        FETCH_OBJ_IS                                         ~5      !0, 'lookahead'
          4        FETCH_DIM_IS                                         ~6      ~5, 'position'
          5        COALESCE                                             ~7      ~6
          6        QM_ASSIGN                                            ~7      null
          7        ASSIGN                                                       !1, ~7
    7     8        INIT_FCALL                                                   'var_dump'
          9        SEND_VAR                                                     !1
         10        DO_ICALL                                                     
    9    11        FETCH_OBJ_W                                          $10     !0, 'lookahead'
         12        ASSIGN_DIM                                                   $10, 'position'
         13        OP_DATA                                                      'test'
   11    14        FETCH_OBJ_IS                                         ~12     !0, 'lookahead'
         15        FETCH_DIM_IS                                         ~13     ~12, 'position'
         16        COALESCE                                             ~14     ~13
         17        QM_ASSIGN                                            ~14     null
         18        ASSIGN                                                       !1, ~14
   13    19        INIT_FCALL                                                   'var_dump'
         20        SEND_VAR                                                     !1
         21        DO_ICALL                                                     
         22      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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