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<?php $obj = new stdClass(); $obj->bar = "xyz"; $data = array("foo" => "bar"); $key = "foo"; // echo $obj->${data[$key]}; syntax error echo $obj->{$data[$key]}; $member = $data[$key]; echo $obj->${member}; echo $obj->{$member}; echo ${data[$key]}; echo "${data[$key]}"; // of course, this works echo "\n{${'data'}[$key]}\n"; echo "{$data[$key]}";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/fCvQh
function name:  (null)
number of ops:  34
compiled vars:  !0 = $obj, !1 = $data, !2 = $key, !3 = $member
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   NEW                                              $4      'stdClass'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $4
    4     3        ASSIGN_OBJ                                               !0, 'bar'
          4        OP_DATA                                                  'xyz'
    5     5        ASSIGN                                                   !1, <array>
    6     6        ASSIGN                                                   !2, 'foo'
    8     7        FETCH_DIM_R                                      ~10     !1, !2
          8        FETCH_OBJ_R                                      ~11     !0, ~10
          9        ECHO                                                     ~11
    9    10        FETCH_DIM_R                                      ~12     !1, !2
         11        ASSIGN                                                   !3, ~12
   10    12        FETCH_CONSTANT                                   ~14     'member'
         13        FETCH_R                      local               ~15     ~14
         14        FETCH_OBJ_R                                      ~16     !0, ~15
         15        ECHO                                                     ~16
   11    16        FETCH_OBJ_R                                      ~17     !0, !3
         17        ECHO                                                     ~17
   13    18        FETCH_CONSTANT                                   ~18     'data'
         19        FETCH_DIM_R                                      ~19     ~18, !2
         20        FETCH_R                      local               ~20     ~19
         21        ECHO                                                     ~20
   14    22        FETCH_DIM_R                                      ~21     !1, !2
         23        CAST                                          6  ~22     ~21
         24        ECHO                                                     ~22
   15    25        ROPE_INIT                                     3  ~25     '%0A'
         26        FETCH_DIM_R                                      ~23     !1, !2
         27        ROPE_ADD                                      1  ~25     ~25, ~23
         28        ROPE_END                                      2  ~24     ~25, '%0A'
         29        ECHO                                                     ~24
   16    30        FETCH_DIM_R                                      ~27     !1, !2
         31        CAST                                          6  ~28     ~27
         32        ECHO                                                     ~28
         33      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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